build(docs-infra): use pinned dependencies when possible in ng-packages-installer (#28510)

Previously, `ng-packages-installer` would replace the version ranges for
all dependencies that were peer dependencies of an Angular package with
the version range used in the Angular package. This effectively meant
that the pinned version (from `yarn.lock`) for that dependency was
ignored (even if the pinned version satisfied the new version range).

This commit reduces non-determinism in CI jobs using the locally built
Angular packages by always using pinned versions of dependencies for
Angular package peer dependencies if possible.

For example, assuming the following versions for the RxJS dependency:

- **aio/package.json**: `rxjs: ^6.3.0`
- **aio/yarn.lock**: `rxjs@^6.3.0: 6.3.3`
- **@angular/core#peerDependencies**: `rxjs: ^6.0.0`

...the following versions would be used with `ng-packages-installer`:

- Before this commit:
  - **aio/package.json**: `rxjs: ^6.0.0`
  - **node_modules/rxjs/**: `6.4.0` (latest version satisfying `^6.0.0`)
- After this commit:
  - **aio/package.json**: `rxjs: ^6.3.0`
  - **node_modules/rxjs/**: `6.3.3` (because it satisfies `^6.0.0`)

PR Close #28510

.circleci/config.yml

@@ -12,8 +12,8 @@
 ## IMPORTANT
 # If you change the `docker_image` version, also change the `cache_key` suffix and the version of
 # `com_github_bazelbuild_buildtools` in the `/WORKSPACE` file.
-var_1: &docker_image angular/ngcontainer:0.4.0
-var_2: &cache_key v2-angular-{{ .Branch }}-{{ checksum "yarn.lock" }}-0.4.0
+var_1: &docker_image angular/ngcontainer:0.6.0
+var_2: &cache_key v2-angular-{{ .Branch }}-{{ checksum "yarn.lock" }}-0.6.0
 
 # Define common ENV vars
 var_3: &define_env_vars
@@ -48,7 +48,7 @@ jobs:
 
       # Check BUILD.bazel formatting before we have a node_modules directory
       # Then we don't need any exclude pattern to avoid checking those files
-      - run: 'buildifier -mode=check $(find . -type f \( -name BUILD.bazel -or -name BUILD \)) ||
+      - run: 'buildifier -mode=check $(find . -type f \( -name "*.bzl" -or -name BUILD.bazel -or -name BUILD \)) ||
               (echo "BUILD files not formatted. Please run ''yarn buildifier''" ; exit 1)'
       # Run the skylark linter to check our Bazel rules
       # deprecated-api is disabled because we use actions.new_file(genfiles_dir)
@@ -148,6 +148,7 @@ jobs:
       - run: bazel run @yarn//:yarn
       - run: bazel query --output=label //... | xargs bazel test --define=compile=local --build_tag_filters=ivy-local --test_tag_filters=-manual,ivy-local
 
+  # This job should only be run on PR builds, where `CIRCLE_PR_NUMBER` is defined.
   aio_preview:
     <<: *job_defaults
     environment:
@@ -158,13 +159,28 @@ jobs:
       - restore_cache:
           key: *cache_key
       - run: yarn install --frozen-lockfile --non-interactive
-      - run: ./aio/scripts/build-artifacts.sh $AIO_SNAPSHOT_ARTIFACT_PATH
+      - run: ./aio/scripts/build-artifacts.sh $AIO_SNAPSHOT_ARTIFACT_PATH $CIRCLE_PR_NUMBER $CIRCLE_SHA1
       - store_artifacts:
           path: *aio_preview_artifact_path
           # The `destination` needs to be kept in synch with the value of
           # `AIO_ARTIFACT_PATH` in `aio/aio-builds-setup/Dockerfile`
           destination: aio/dist/aio-snapshot.tgz
 
+  # This job should only be run on PR builds, where `CIRCLE_PR_NUMBER` is defined.
+  test_aio_preview:
+    <<: *job_defaults
+    steps:
+      - checkout:
+          <<: *post_checkout
+      - restore_cache:
+          key: *cache_key
+      - run: yarn install --cwd aio --frozen-lockfile --non-interactive
+      - run:
+          name: Wait for preview and run tests
+          command: |
+            source "./scripts/ci/env.sh" print
+            xvfb-run --auto-servernum node aio/scripts/test-preview.js $CIRCLE_PR_NUMBER $CIRCLE_SHA1 $AIO_MIN_PWA_SCORE
+
   # This job exists only for backwards-compatibility with old scripts and tests
   # that rely on the pre-Bazel dist/packages-dist layout.
   # It duplicates some work with the job above: we build the bazel packages
@@ -251,7 +267,11 @@ jobs:
           <<: *post_checkout
       - restore_cache:
           key: *cache_key
-      - run: xvfb-run --auto-servernum ./aio/scripts/test-production.sh
+      - run:
+          name: Run tests against the deployed apps
+          command: |
+            source "./scripts/ci/env.sh" print
+            xvfb-run --auto-servernum ./aio/scripts/test-production.sh $AIO_MIN_PWA_SCORE
 
 workflows:
   version: 2
@@ -262,7 +282,14 @@ workflows:
       - test_ivy_jit
       - test_ivy_aot
       - build-packages-dist
-      - aio_preview
+      - aio_preview:
+          # Only run on PR builds. (There can be no previews for non-PR builds.)
+          filters:
+            branches:
+              only: /pull\/\d+/
+      - test_aio_preview:
+          requires:
+            - aio_preview
       - integration_test:
           requires:
             - build-packages-dist
@@ -291,6 +318,7 @@ workflows:
             branches:
               only:
                 - master
+
 notify:
   webhooks:
     - url: https://ngbuilds.io/circle-build

.github/angular-robot.yml

@@ -3,11 +3,8 @@
 #options for the size plugin
 size:
   disabled: false
-  maxSizeIncrease: 1000
-  circleCiStatusName: "ci/circleci: build-packages-dist"
-  status:
-    disabled: false
-    context: "ci/angular: size"
+  maxSizeIncrease: 2000
+  circleCiStatusName: "ci/circleci: test"
 
 # options for the merge plugin
 merge:
@@ -68,7 +65,7 @@ merge:
     # This enables us to request reviews from both eng and tech writers, or multiple eng folks, and prevents accidental merges.
     # Rather than merging PRs with pending reviews, if all PullApprove requirements are satisfied and additional reviews are not needed pending reviewers should be removed via GitHub UI (this also leaves an audit trail behind these decisions).
     requireReviews: true,
-  
+
     # whether the PR shouldn't have a conflict with the base branch
     noConflict: true
     # list of labels that a PR needs to have, checked with a regexp (e.g. "PR target:" will work for the label "PR target: master")

.nvmrc

@@ -1 +1 @@
-8.9
+10.9.0

.travis.yml

@@ -2,7 +2,7 @@ language: node_js
 sudo: false
 dist: trusty
 node_js:
-  - '8.9.1'
+  - '10.9.0'
 
 addons:
 #  firefox: "38.0"
@@ -49,12 +49,14 @@ env:
     - CI_MODE=browserstack_optional
     - CI_MODE=aio_tools_test
     - CI_MODE=aio
+    - CI_MODE=aio_local
     - CI_MODE=aio_e2e AIO_SHARD=0
     - CI_MODE=aio_e2e AIO_SHARD=1
 
 matrix:
   fast_finish: true
   allow_failures:
+    - env: "CI_MODE=aio_local"
     - env: "CI_MODE=saucelabs_optional"
     - env: "CI_MODE=browserstack_optional"
 

CHANGELOG.md

@@ -1,3 +1,45 @@
+<a name="6.1.10"></a>
+## [6.1.10](https://github.com/angular/angular/compare/6.1.9...6.1.10) (2018-10-10)
+
+
+### Bug Fixes
+
+* **platform-browser:** fix [#22155](https://github.com/angular/angular/issues/22155), destroy hammer manager when `HammerInstance.off()` is run ([#22156](https://github.com/angular/angular/issues/22156)) ([3b4d9dc](https://github.com/angular/angular/commit/3b4d9dc))
+* **upgrade:** properly destroy upgraded component elements and descendants ([#26209](https://github.com/angular/angular/issues/26209)) ([623adbb](https://github.com/angular/angular/commit/623adbb)), closes [#26208](https://github.com/angular/angular/issues/26208)
+
+
+
+<a name="6.1.9"></a>
+## [6.1.9](https://github.com/angular/angular/compare/6.1.8...6.1.9) (2018-09-26)
+
+
+### Bug Fixes
+
+* **service-worker:** do not blow up when caches are unwritable ([#26042](https://github.com/angular/angular/issues/26042)) ([a169743](https://github.com/angular/angular/commit/a169743))
+
+
+
+<a name="6.1.8"></a>
+## [6.1.8](https://github.com/angular/angular/compare/6.1.7...6.1.8) (2018-09-19)
+
+
+### Bug Fixes
+
+* **bazel:** allow compile_strategy to be (privately) imported ([#25080](https://github.com/angular/angular/issues/25080)) ([2d0e642](https://github.com/angular/angular/commit/2d0e642))
+* **bazel:** correct type concatenated to devmode_js ([#25467](https://github.com/angular/angular/issues/25467)) ([91dd160](https://github.com/angular/angular/commit/91dd160))
+* **bazel:** move bazel managed runtime deps for downstream usage ([#25690](https://github.com/angular/angular/issues/25690)) ([48d7f4e](https://github.com/angular/angular/commit/48d7f4e))
+* **bazel:** specify the package and lock files using the workspace ([#25694](https://github.com/angular/angular/issues/25694)) ([678b420](https://github.com/angular/angular/commit/678b420))
+* **compiler:** Fix look up of entryComponents in AOT Summaries ([#24892](https://github.com/angular/angular/issues/24892)) ([a31cfc5](https://github.com/angular/angular/commit/a31cfc5))
+* **router:** mount correct component if router outlet was not instantiated and if using a route reuse strategy ([#25313](https://github.com/angular/angular/issues/25313)) ([#25314](https://github.com/angular/angular/issues/25314)) ([e117b1f](https://github.com/angular/angular/commit/e117b1f))
+
+
+### Features
+
+* **bazel:** add additional parameters to `ts_api_guardian_test` def ([#25694](https://github.com/angular/angular/issues/25694)) ([97ae7ae](https://github.com/angular/angular/commit/97ae7ae))
+* **ivy:** enable .ngfactory.js generation in g3 only ([#25392](https://github.com/angular/angular/issues/25392)) ([1c44b71](https://github.com/angular/angular/commit/1c44b71))
+
+
+
 <a name="6.1.7"></a>
 ## [6.1.7](https://github.com/angular/angular/compare/6.1.6...6.1.7) (2018-09-06)
 
@@ -8,12 +50,6 @@
 * **core:** size regression with closure compiler ([#25531](https://github.com/angular/angular/issues/25531)) ([ebcf762](https://github.com/angular/angular/commit/ebcf762))
 * **docs-infra:** show "suggest edits" only for /guide and /tutorial dirs ([#24378](https://github.com/angular/angular/issues/24378)) ([66b7870](https://github.com/angular/angular/commit/66b7870))
 * **upgrade:** trigger `$destroy` event on upgraded component element ([#25357](https://github.com/angular/angular/issues/25357)) ([82e0676](https://github.com/angular/angular/commit/82e0676)), closes [#25334](https://github.com/angular/angular/issues/25334)
-
-
-### Features
-
-* **docs-infra:** add "suggest edits" feature to all docs ([#24378](https://github.com/angular/angular/issues/24378)) ([82088a8](https://github.com/angular/angular/commit/82088a8))
-* **docs-infra:** disable "status" selector in API list when displaying only packages ([#25718](https://github.com/angular/angular/issues/25718)) ([6f7df8a](https://github.com/angular/angular/commit/6f7df8a)), closes [#25708](https://github.com/angular/angular/issues/25708)
 * **router:** warn if navigation triggered outside Angular zone ([#24959](https://github.com/angular/angular/issues/24959)) ([23a96dc](https://github.com/angular/angular/commit/23a96dc)), closes [#15770](https://github.com/angular/angular/issues/15770) [#15946](https://github.com/angular/angular/issues/15946) [#24728](https://github.com/angular/angular/issues/24728)
 
 

CONTRIBUTING.md

@@ -71,6 +71,8 @@ Before you submit your Pull Request (PR) consider the following guidelines:
 
 1. Search [GitHub](https://github.com/angular/angular/pulls) for an open or closed PR
   that relates to your submission. You don't want to duplicate effort.
+1. Be sure that an issue describes the problem you're fixing, or documents the design for the feature you'd like to add.
+  Discussing the design up front helps to ensure that we're ready to accept your work.
 1. Please sign our [Contributor License Agreement (CLA)](#cla) before sending PRs.
   We cannot accept code without this. Make sure you sign with the primary email address of the Git identity that has been granted access to the Angular repository.
 1. Fork the angular/angular repo.

WORKSPACE

@@ -3,58 +3,58 @@ workspace(name = "angular")
 #
 # Download Bazel toolchain dependencies as needed by build actions
 #
-http_archive(
-    name = "build_bazel_rules_nodejs",
-    urls = ["https://github.com/bazelbuild/rules_nodejs/archive/0.12.0.zip"],
-    strip_prefix = "rules_nodejs-0.12.0",
-    sha256 = "2977cdbc8ae0eed7d4186385af56a50a3321a549e2136a959998bba89d2edb6e",
-)
-
-http_archive(
-    name = "bazel_skylib",
-    urls = ["https://github.com/bazelbuild/bazel-skylib/archive/0.3.1.zip"],
-    strip_prefix = "bazel-skylib-0.3.1",
-    sha256 = "95518adafc9a2b656667bbf517a952e54ce7f350779d0dd95133db4eb5c27fb1",
-)
-
-http_archive(
-    name = "io_bazel_rules_webtesting",
-    url = "https://github.com/bazelbuild/rules_webtesting/archive/0.2.1.zip",
-    strip_prefix = "rules_webtesting-0.2.1",
-    sha256 = "7d490aadff9b5262e5251fa69427ab2ffd1548422467cb9f9e1d110e2c36f0fa",
-)
-
 http_archive(
     name = "build_bazel_rules_typescript",
-    url = "https://github.com/bazelbuild/rules_typescript/archive/0.16.0.zip",
-    strip_prefix = "rules_typescript-0.16.0",
-    sha256 = "e65c5639a42e2f6d3f9d2bda62487d6b42734830dda45be1620c3e2b1115070c",
+    url = "https://github.com/bazelbuild/rules_typescript/archive/0.17.0.zip",
+    strip_prefix = "rules_typescript-0.17.0",
+    sha256 = "1626ee2cc9770af6950bfc77dffa027f9aedf330fe2ea2ee7e504428927bd95d",
+)
+load("@build_bazel_rules_typescript//:package.bzl", "rules_typescript_dependencies")
+rules_typescript_dependencies()
+
+http_archive(
+  name = "bazel_toolchains",
+  urls = [
+    "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/5124557861ebf4c0b67f98180bff1f8551e0b421.tar.gz",
+    "https://github.com/bazelbuild/bazel-toolchains/archive/5124557861ebf4c0b67f98180bff1f8551e0b421.tar.gz",
+  ],
+  strip_prefix = "bazel-toolchains-5124557861ebf4c0b67f98180bff1f8551e0b421",
+  sha256 = "c3b08805602cd1d2b67ebe96407c1e8c6ed3d4ce55236ae2efe2f1948f38168d",
 )
 
 http_archive(
-    name = "io_bazel_rules_go",
-    url = "https://github.com/bazelbuild/rules_go/releases/download/0.10.3/rules_go-0.10.3.tar.gz",
-    sha256 = "feba3278c13cde8d67e341a837f69a029f698d7a27ddbb2a202be7a10b22142a",
+    name = "io_bazel_rules_sass",
+    url = "https://github.com/bazelbuild/rules_sass/archive/1.11.0.zip",
+    strip_prefix = "rules_sass-1.11.0",
+    sha256 = "dbe9fb97d5a7833b2a733eebc78c9c1e3880f676ac8af16e58ccf2139cbcad03",
 )
 
 # This commit matches the version of buildifier in angular/ngcontainer
 # If you change this, also check if it matches the version in the angular/ngcontainer
 # version in /.circleci/config.yml
-BAZEL_BUILDTOOLS_VERSION = "82b21607e00913b16fe1c51bec80232d9d6de31c"
+BAZEL_BUILDTOOLS_VERSION = "49a6c199e3fbf5d94534b2771868677d3f9c6de9"
 
 http_archive(
     name = "com_github_bazelbuild_buildtools",
     url = "https://github.com/bazelbuild/buildtools/archive/%s.zip" % BAZEL_BUILDTOOLS_VERSION,
     strip_prefix = "buildtools-%s" % BAZEL_BUILDTOOLS_VERSION,
-    sha256 = "edb24c2f9c55b10a820ec74db0564415c0cf553fa55e9fc709a6332fb6685eff",
+    sha256 = "edf39af5fc257521e4af4c40829fffe8fba6d0ebff9f4dd69a6f8f1223ae047b",
 )
 
 # Fetching the Bazel source code allows us to compile the Skylark linter
 http_archive(
     name = "io_bazel",
-    url = "https://github.com/bazelbuild/bazel/archive/968f87900dce45a7af749a965b72dbac51b176b3.zip",
-    strip_prefix = "bazel-968f87900dce45a7af749a965b72dbac51b176b3",
-    sha256 = "e373d2ae24955c1254c495c9c421c009d88966565c35e4e8444c082cb1f0f48f",
+    url = "https://github.com/bazelbuild/bazel/archive/0.17.1.zip",
+    strip_prefix = "bazel-0.17.1",
+    sha256 = "ace8cced3b21e64a8fdad68508e9b0644201ec848ad583651719841d567fc66d",
+)
+
+http_archive(
+    name = "io_bazel_skydoc",
+    # TODO: switch to upstream when https://github.com/bazelbuild/skydoc/pull/103 is merged
+    url = "https://github.com/alexeagle/skydoc/archive/fe2e9f888d28e567fef62ec9d4a93c425526d701.zip",
+    strip_prefix = "skydoc-fe2e9f888d28e567fef62ec9d4a93c425526d701",
+    sha256 = "7bfb5545f59792a2745f2523b9eef363f9c3e7274791c030885e7069f8116016",
 )
 
 # We have a source dependency on the Devkit repository, because it's built with
@@ -72,9 +72,9 @@ http_archive(
 
 http_archive(
     name = "org_brotli",
-    url = "https://github.com/google/brotli/archive/f9b8c02673c576a3e807edbf3a9328e9e7af6d7c.zip",
-    strip_prefix = "brotli-f9b8c02673c576a3e807edbf3a9328e9e7af6d7c",
-    sha256 = "8a517806d2b7c8505ba5c53934e7d7c70d341b68ffd268e9044d35b564a48828",
+    url = "https://github.com/google/brotli/archive/v1.0.5.zip",
+    strip_prefix = "brotli-1.0.5",
+    sha256 = "774b893a0700b0692a76e2e5b7e7610dbbe330ffbe3fe864b4b52ca718061d5a",
 )
 
 #
@@ -97,16 +97,18 @@ local_repository(
 # Load and install our dependencies downloaded above.
 #
 
-load("@build_bazel_rules_nodejs//:defs.bzl", "check_bazel_version", "node_repositories", "yarn_install")
+load("@build_bazel_rules_nodejs//:defs.bzl", "check_bazel_version", "node_repositories")
 
-check_bazel_version("0.16.0", """
+check_bazel_version("0.17.0", """
 If you are on a Mac and using Homebrew, there is a breaking change to the installation in Bazel 0.16
 See https://blog.bazel.build/2018/08/22/bazel-homebrew.html
 
 """)
 node_repositories(
-  package_json = ["//:package.json"],
-  preserve_symlinks = True,
+    package_json = ["//:package.json"],
+    preserve_symlinks = True,
+    node_version = "10.9.0",
+    yarn_version = "1.9.2",
 )
 
 load("@io_bazel_rules_go//go:def.bzl", "go_rules_dependencies", "go_register_toolchains")
@@ -130,20 +132,11 @@ load("@angular//:index.bzl", "ng_setup_workspace")
 
 ng_setup_workspace()
 
-#
-# Ask Bazel to manage these toolchain dependencies for us.
-# Bazel will run `yarn install` when one of these toolchains is requested during
-# a build.
-#
+##################################
+# Skylark documentation generation
 
-yarn_install(
-    name = "ts-api-guardian_runtime_deps",
-    package_json = "//tools/ts-api-guardian:package.json",
-    yarn_lock = "//tools/ts-api-guardian:yarn.lock",
-)
+load("@io_bazel_rules_sass//sass:sass_repositories.bzl", "sass_repositories")
+sass_repositories()
 
-yarn_install(
-    name = "http-server_runtime_deps",
-    package_json = "//tools/http-server:package.json",
-    yarn_lock = "//tools/http-server:yarn.lock",
-)
+load("@io_bazel_skydoc//skylark:skylark.bzl", "skydoc_repositories")
+skydoc_repositories()

aio/README.md

@@ -22,8 +22,8 @@ Here are the most important tasks you might need to use:
 * `yarn start` - run a development web server that watches the files; then builds the doc-viewer and reloads the page, as necessary.
 * `yarn serve-and-sync` - run both the `docs-watch` and `start` in the same console.
 * `yarn lint` - check that the doc-viewer code follows our style rules.
-* `yarn test` - run all the unit tests once.
-* `yarn test --watch` - watch all the source files, for the doc-viewer, and run all the unit tests when any change.
+* `yarn test` - watch all the source files, for the doc-viewer, and run all the unit tests when any change.
+* `yarn test --watch=false` - run all the unit tests once.
 * `yarn e2e` - run all the e2e tests for the doc-viewer.
 
 * `yarn docs` - generate all the docs from the source files.
@@ -56,14 +56,9 @@ It's necessary to remove the temporary files, because otherwise they're displaye
 
 ## Using ServiceWorker locally
 
-Since abb36e3cb, running `yarn start --prod` will no longer set up the ServiceWorker, which
-would require manually running `yarn sw-manifest` and `yarn sw-copy` (something that is not possible
-with webpack serving the files from memory).
-
-If you want to test ServiceWorker locally, you can use `yarn build` and serve the files in `dist/`
-with `yarn http-server dist -p 4200`.
-
-For more details see #16745.
+Running `yarn start` (even when explicitly targeting production mode) does not set up the
+ServiceWorker. If you want to test the ServiceWorker locally, you can use `yarn build` and then
+serve the files in `dist/` with `yarn http-server dist -p 4200`.
 
 
 ## Guide to authoring

aio/aio-builds-setup/dockerbuild/cronjobs/aio-builds-cleanup

@@ -1,2 +1,2 @@
 # Periodically clean up builds that do not correspond to currently open PRs
-0 12 * * * root /usr/local/bin/aio-clean-up >> /var/log/cron.log 2>&1
+0 12 * * * /usr/local/bin/aio-clean-up >> /var/log/cron.log 2>&1

aio/aio-builds-setup/dockerbuild/nginx/aio-builds.conf

@@ -36,6 +36,11 @@ server {
   access_log {{$AIO_NGINX_LOGS_DIR}}/access.log;
   error_log  {{$AIO_NGINX_LOGS_DIR}}/error.log;
 
+  error_page 404 /404.html;
+  location "=/404.html" {
+    internal;
+  }
+
   location "~/[^/]+\.[^/]+$" {
     try_files $uri $uri/ =404;
   }
@@ -66,6 +71,21 @@ server {
     return 200 '';
   }
 
+  # Check PRs previewability
+  location "~^/can-have-public-preview/\d+/?$" {
+    if ($request_method != "GET") {
+      add_header Allow "GET";
+      return 405;
+    }
+
+    proxy_pass_request_headers on;
+    proxy_redirect             off;
+    proxy_method               GET;
+    proxy_pass                 http://{{$AIO_PREVIEW_SERVER_HOSTNAME}}:{{$AIO_PREVIEW_SERVER_PORT}}$request_uri;
+
+    resolver 127.0.0.1;
+  }
+
   # Notify about CircleCI builds
   location "~^/circle-build/?$" {
     if ($request_method != "POST") {

aio/aio-builds-setup/dockerbuild/scripts-js/lib/clean-up/build-cleaner.ts

@@ -5,12 +5,12 @@ import * as shell from 'shelljs';
 import {HIDDEN_DIR_PREFIX} from '../common/constants';
 import {GithubApi} from '../common/github-api';
 import {GithubPullRequests} from '../common/github-pull-requests';
-import {assertNotMissingOrEmpty, createLogger, getPrInfoFromDownloadPath} from '../common/utils';
+import {assertNotMissingOrEmpty, getPrInfoFromDownloadPath, Logger} from '../common/utils';
 
 // Classes
 export class BuildCleaner {
 
-  private logger = createLogger('BuildCleaner');
+  private logger = new Logger('BuildCleaner');
 
   // Constructor
   constructor(protected buildsDir: string, protected githubOrg: string, protected githubRepo: string,
@@ -122,6 +122,6 @@ export class BuildCleaner {
     this.logger.log(`Existing downloads: ${existingDownloads.length}`);
     this.logger.log(`Removing ${toRemove.length} download(s): ${toRemove.join(', ')}`);
 
-    toRemove.forEach(filePath => shell.rm(filePath));
+    toRemove.forEach(filePath => shell.rm(path.join(this.downloadsDir, filePath)));
   }
 }

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/circle-ci-api.ts

@@ -62,7 +62,7 @@ export class CircleCiApi {
       if (response.status !== 200) {
         throw new Error(`${baseUrl}: ${response.status} - ${response.statusText}`);
       }
-      return response.json<BuildInfo>();
+      return response.json();
     } catch (error) {
         throw new Error(`CircleCI build info request failed (${error.message})`);
     }
@@ -77,7 +77,7 @@ export class CircleCiApi {
     const baseUrl = `${CIRCLE_CI_API_URL}/${this.githubOrg}/${this.githubRepo}/${buildNumber}`;
     try {
       const response = await fetch(`${baseUrl}/artifacts?${this.tokenParam}`);
-      const artifacts = await response.json<ArtifactResponse>();
+      const artifacts = await response.json() as ArtifactResponse;
       const artifact = artifacts.find(item => item.path === artifactPath);
       if (!artifact) {
         throw new Error(`Missing artifact (${artifactPath}) for CircleCI build: ${buildNumber}`);

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-api.ts

@@ -38,7 +38,8 @@ export class GithubApi {
     return this.request<T>('post', path, data);
   }
 
-  public getPaginated<T>(pathname: string, baseParams: RequestParams = {}, currentPage: number = 0): Promise<T[]> {
+  // In GitHub API paginated requests, page numbering is 1-based. (https://developer.github.com/v3/#pagination)
+  public getPaginated<T>(pathname: string, baseParams: RequestParams = {}, currentPage: number = 1): Promise<T[]> {
     const perPage = 100;
     const params = {
       ...baseParams,

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-pull-requests.ts

@@ -74,6 +74,6 @@ export class GithubPullRequests {
    */
   public fetchFiles(pr: number): Promise<FileInfo[]> {
     assert(pr > 0, `Invalid PR number: ${pr}`);
-    return this.api.get<FileInfo[]>(`/repos/${this.repoSlug}/pulls/${pr}/files`);
+    return this.api.getPaginated<FileInfo>(`/repos/${this.repoSlug}/pulls/${pr}/files`);
   }
 }

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/run-tests.ts

@@ -1,14 +1,14 @@
-export const runTests = (specFiles: string[], helpers?: string[]) => {
-  // We can't use `import` here, because of the following mess:
-  // - GitHub project `jasmine/jasmine` is `jasmine-core` on npm and its typings `@types/jasmine`.
-  // - GitHub project `jasmine/jasmine-npm` is `jasmine` on npm and has no typings.
-  //
-  // Using `import...from 'jasmine'` here, would import from `@types/jasmine` (which refers to the
-  // `jasmine-core` module and the `jasmine` module).
-  // tslint:disable-next-line: no-var-requires variable-name
-  const Jasmine = require('jasmine');
+// We can't use `import...from` here, because of the following mess:
+// - GitHub project `jasmine/jasmine` is `jasmine-core` on npm and its typings `@types/jasmine`.
+// - GitHub project `jasmine/jasmine-npm` is `jasmine` on npm and has no typings.
+//
+// Using `import...from 'jasmine'` here, would import from `@types/jasmine` (which refers to the
+// `jasmine-core` module and the `jasmine` module).
+import Jasmine = require('jasmine');
+import 'source-map-support/register';
+
+export const runTests = (specFiles: string[]) => {
   const config = {
-    helpers,
     random: true,
     spec_files: specFiles,
     stopSpecOnExpectationFailure: true,
@@ -16,7 +16,7 @@ export const runTests = (specFiles: string[], helpers?: string[]) => {
 
   process.on('unhandledRejection', (reason: any) => console.log('Unhandled rejection:', reason));
 
-  const runner = new Jasmine();
+  const runner = new Jasmine({});
   runner.loadConfig(config);
   runner.onComplete((passed: boolean) => process.exit(passed ? 0 : 1));
   runner.execute();

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/utils.ts

@@ -74,12 +74,25 @@ export const getEnvVar = (name: string, isOptional = false): string => {
   return value || '';
 };
 
-export function createLogger(scope: string) {
-  const padding = ' '.repeat(20 - scope.length);
-  return {
-    error: (...args: any[]) => console.error(`[${new Date()}]`, `${scope}:${padding}`, ...args),
-    info: (...args: any[]) => console.info(`[${new Date()}]`, `${scope}:${padding}`, ...args),
-    log: (...args: any[]) => console.log(`[${new Date()}]`, `${scope}:${padding}`, ...args),
-    warn: (...args: any[]) => console.warn(`[${new Date()}]`, `${scope}:${padding}`, ...args),
-  };
+/**
+ * A basic logger implementation.
+ * Delegates to `console`, but prepends each message with the current date and specified scope (i.e caller).
+ */
+export class Logger {
+  private padding = ' '.repeat(20 - this.scope.length);
+
+  /**
+   * Create a new `Logger` instance for the specified `scope`.
+   * @param scope The logger's scope (added to all messages).
+   */
+  constructor(private scope: string) {}
+
+  public error(...args: any[]) { this.callMethod('error', args); }
+  public info(...args: any[]) { this.callMethod('info', args); }
+  public log(...args: any[]) { this.callMethod('log', args); }
+  public warn(...args: any[]) { this.callMethod('warn', args); }
+
+  private callMethod(method: 'error' | 'info' | 'log' | 'warn', args: any[]) {
+    console[method](`[${new Date()}]`, `${this.scope}:${this.padding}`, ...args);
+  }
 }

aio/aio-builds-setup/dockerbuild/scripts-js/lib/preview-server/build-creator.ts

@@ -5,14 +5,14 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as shell from 'shelljs';
 import {HIDDEN_DIR_PREFIX} from '../common/constants';
-import {assertNotMissingOrEmpty, computeShortSha, createLogger} from '../common/utils';
+import {assertNotMissingOrEmpty, computeShortSha, Logger} from '../common/utils';
 import {ChangedPrVisibilityEvent, CreatedBuildEvent} from './build-events';
 import {PreviewServerError} from './preview-error';
 
 // Classes
 export class BuildCreator extends EventEmitter {
 
-  private logger = createLogger('BuildCreator');
+  private logger = new Logger('BuildCreator');
 
   // Constructor
   constructor(protected buildsDir: string) {

aio/aio-builds-setup/dockerbuild/scripts-js/lib/preview-server/build-retriever.ts

@@ -4,7 +4,7 @@ import {dirname} from 'path';
 import {mkdir} from 'shelljs';
 import {promisify} from 'util';
 import {CircleCiApi} from '../common/circle-ci-api';
-import {assert, assertNotMissingOrEmpty, computeArtifactDownloadPath, createLogger} from '../common/utils';
+import {assert, assertNotMissingOrEmpty, computeArtifactDownloadPath, Logger} from '../common/utils';
 import {PreviewServerError} from './preview-error';
 
 export interface GithubInfo {
@@ -19,7 +19,7 @@ export interface GithubInfo {
  * A helper that can get information about builds and download build artifacts.
  */
 export class BuildRetriever {
-  private logger = createLogger('BuildRetriever');
+  private logger = new Logger('BuildRetriever');
   constructor(private api: CircleCiApi, private downloadSizeLimit: number, private downloadDir: string) {
     assert(downloadSizeLimit > 0, 'Invalid parameter "downloadSizeLimit" should be a number greater than 0.');
     assertNotMissingOrEmpty('downloadDir', downloadDir);
@@ -34,7 +34,7 @@ export class BuildRetriever {
     const buildInfo = await this.api.getBuildInfo(buildNum);
     const githubInfo: GithubInfo = {
       org: buildInfo.username,
-      pr: getPrfromBranch(buildInfo.branch),
+      pr: getPrFromBranch(buildInfo.branch),
       repo: buildInfo.reponame,
       sha: buildInfo.vcs_revision,
       success: !buildInfo.failed,
@@ -73,7 +73,7 @@ export class BuildRetriever {
   }
 }
 
-function getPrfromBranch(branch: string): number {
+function getPrFromBranch(branch: string): number {
   // CircleCI only exposes PR numbers via the `branch` field :-(
   const match = /^pull\/(\d+)$/.exec(branch);
   if (!match) {

aio/aio-builds-setup/dockerbuild/scripts-js/lib/preview-server/preview-server-factory.ts

@@ -2,11 +2,12 @@
 import * as bodyParser from 'body-parser';
 import * as express from 'express';
 import * as http from 'http';
+import {AddressInfo} from 'net';
 import {CircleCiApi} from '../common/circle-ci-api';
 import {GithubApi} from '../common/github-api';
 import {GithubPullRequests} from '../common/github-pull-requests';
 import {GithubTeams} from '../common/github-teams';
-import {assert, assertNotMissingOrEmpty, createLogger} from '../common/utils';
+import {assert, assertNotMissingOrEmpty, Logger} from '../common/utils';
 import {BuildCreator} from './build-creator';
 import {ChangedPrVisibilityEvent, CreatedBuildEvent} from './build-events';
 import {BuildRetriever} from './build-retriever';
@@ -31,7 +32,7 @@ export interface PreviewServerConfig {
   trustedPrLabel: string;
 }
 
-const logger = createLogger('PreviewServer');
+const logger = new Logger('PreviewServer');
 
 // Classes
 export class PreviewServerFactory {
@@ -52,7 +53,7 @@ export class PreviewServerFactory {
     const httpServer = http.createServer(middleware as any);
 
     httpServer.on('listening', () => {
-      const info = httpServer.address();
+      const info = httpServer.address() as AddressInfo;
       logger.info(`Up and running (and listening on ${info.address}:${info.port})...`);
     });
 
@@ -63,10 +64,36 @@ export class PreviewServerFactory {
                                  buildCreator: BuildCreator, cfg: PreviewServerConfig): express.Express {
     const middleware = express();
     const jsonParser = bodyParser.json();
+    const significantFilesRe = new RegExp(cfg.significantFilesPattern);
 
     // RESPOND TO IS-ALIVE PING
     middleware.get(/^\/health-check\/?$/, (_req, res) => res.sendStatus(200));
 
+    // RESPOND TO CAN-HAVE-PUBLIC-PREVIEW CHECK
+    const canHavePublicPreviewRe = /^\/can-have-public-preview\/(\d+)\/?$/;
+    middleware.get(canHavePublicPreviewRe, async (req, res) => {
+      try {
+        const pr = +canHavePublicPreviewRe.exec(req.url)![1];
+
+        if (!await buildVerifier.getSignificantFilesChanged(pr, significantFilesRe)) {
+          // Cannot have preview: PR did not touch relevant files: `aio/` or `packages/` (except for spec files).
+          res.send({canHavePublicPreview: false, reason: 'No significant files touched.'});
+          logger.log(`PR:${pr} - Cannot have a public preview, because it did not touch any significant files.`);
+        } else if (!await buildVerifier.getPrIsTrusted(pr)) {
+          // Cannot have preview: PR not automatically verifiable as "trusted".
+          res.send({canHavePublicPreview: false, reason: 'Not automatically verifiable as "trusted".'});
+          logger.log(`PR:${pr} - Cannot have a public preview, because not automatically verifiable as "trusted".`);
+        } else {
+          // Can have preview.
+          res.send({canHavePublicPreview: true, reason: null});
+          logger.log(`PR:${pr} - Can have a public preview.`);
+        }
+      } catch (err) {
+        logger.error('Previewability check error', err);
+        respondWithError(res, err);
+      }
+    });
+
     // CIRCLE_CI BUILD COMPLETE WEBHOOK
     middleware.post(/^\/circle-build\/?$/, jsonParser, async (req, res) => {
       try {
@@ -107,7 +134,7 @@ export class PreviewServerFactory {
           `Invalid webhook: expected "githubRepo" property to equal "${cfg.githubRepo}" but got "${repo}".`);
 
         // Do not deploy unless this PR has touched relevant files: `aio/` or `packages/` (except for spec files)
-        if (!await buildVerifier.getSignificantFilesChanged(pr, new RegExp(cfg.significantFilesPattern))) {
+        if (!await buildVerifier.getSignificantFilesChanged(pr, significantFilesRe)) {
           res.sendStatus(204);
           logger.log(`PR:${pr}, Build:${buildNum} - ` +
                      `Skipping preview processing because this PR did not touch any significant files.`);

aio/aio-builds-setup/dockerbuild/scripts-js/lib/verify-setup/helper.ts

@@ -11,7 +11,7 @@ import {
   AIO_NGINX_PORT_HTTPS,
   AIO_WWW_USER,
 } from '../common/env-variables';
-import {computeShortSha, createLogger} from '../common/utils';
+import {computeShortSha, Logger} from '../common/utils';
 
 // Interfaces - Types
 export interface CmdResult { success: boolean; err: Error | null; stdout: string; stderr: string; }
@@ -31,7 +31,7 @@ class Helper {
     https: AIO_NGINX_PORT_HTTPS,
   };
 
-  private logger = createLogger('TestHelper');
+  private logger = new Logger('TestHelper');
 
   // Constructor
   constructor() {
@@ -105,7 +105,7 @@ class Helper {
     Object.keys(this.portPerScheme).forEach(scheme => suiteFactory(scheme, this.portPerScheme[scheme]));
   }
 
-  public verifyResponse(status: number | [number, string], regex = /^/): VerifyCmdResultFn {
+  public verifyResponse(status: number | [number, string], regex: string | RegExp = /^/): VerifyCmdResultFn {
     let statusCode: number;
     let statusText: string;
 
@@ -180,26 +180,42 @@ class Helper {
   }
 }
 
+interface DefaultCurlOptions {
+  defaultMethod?: CurlOptions['method'];
+  defaultOptions?: CurlOptions['options'];
+  defaultHeaders?: CurlOptions['headers'];
+  defaultData?: CurlOptions['data'];
+  defaultExtraPath?: CurlOptions['extraPath'];
+}
+
 interface CurlOptions {
   method?: string;
   options?: string;
+  headers?: string[];
   data?: any;
   url?: string;
   extraPath?: string;
 }
 
-export function makeCurl(baseUrl: string) {
+export function makeCurl(baseUrl: string, {
+  defaultMethod = 'POST',
+  defaultOptions = '',
+  defaultHeaders = ['Content-Type: application/json'],
+  defaultData = {},
+  defaultExtraPath = '',
+}: DefaultCurlOptions = {}) {
   return function curl({
-    method = 'POST',
-    options = '',
-    data = {},
+    method = defaultMethod,
+    options = defaultOptions,
+    headers = defaultHeaders,
+    data = defaultData,
     url = baseUrl,
-    extraPath = '',
+    extraPath = defaultExtraPath,
   }: CurlOptions) {
     const dataString = data ? JSON.stringify(data) : '';
     const cmd = `curl -iLX ${method} ` +
                 `${options} ` +
-                `--header "Content-Type: application/json" ` +
+                headers.map(header => `--header "${header}" `).join('') +
                 `--data '${dataString}' ` +
                 `${url}${extraPath}`;
     return helper.runCmd(cmd);

aio/aio-builds-setup/dockerbuild/scripts-js/lib/verify-setup/mock-external-apis.ts

@@ -2,7 +2,7 @@
 import * as nock from 'nock';
 import * as tar from 'tar-stream';
 import {gzipSync} from 'zlib';
-import {createLogger, getEnvVar} from '../common/utils';
+import {getEnvVar, Logger} from '../common/utils';
 import {BuildNums, PrNums, SHA} from './constants';
 
 // We are using the `nock` library to fake responses from REST requests, when testing.
@@ -14,7 +14,7 @@ import {BuildNums, PrNums, SHA} from './constants';
 // below and return a suitable response. This is quite complicated to setup since the
 // response from, say, CircleCI will affect what request is made to, say, Github.
 
-const logger = createLogger('NOCK');
+const logger = new Logger('mock-external-apis');
 
 const log = (...args: any[]) => {
   // Filter out non-matching URL checks
@@ -76,7 +76,7 @@ const GITHUB_PULLS_URL = `/repos/${AIO_GITHUB_ORGANIZATION}/${AIO_GITHUB_REPO}/p
 const GITHUB_TEAMS_URL = `/orgs/${AIO_GITHUB_ORGANIZATION}/teams`;
 
 const getIssueUrl = (prNum: number) => `${GITHUB_ISSUES_URL}/${prNum}`;
-const getFilesUrl = (prNum: number) => `${GITHUB_PULLS_URL}/${prNum}/files`;
+const getFilesUrl = (prNum: number, pageNum = 1) => `${GITHUB_PULLS_URL}/${prNum}/files?page=${pageNum}&per_page=100`;
 const getCommentUrl = (prNum: number) => `${getIssueUrl(prNum)}/comments`;
 const getTeamMembershipUrl = (teamId: number, username: string) => `/teams/${teamId}/memberships/${username}`;
 
@@ -97,7 +97,7 @@ const githubApi = nock(GITHUB_API_HOST).log(log).persist().matchHeader('Authoriz
 //////////////////////////////
 
 // GENERAL responses
-githubApi.get(GITHUB_TEAMS_URL + '?page=0&per_page=100').reply(200, TEST_TEAM_INFO);
+githubApi.get(GITHUB_TEAMS_URL + '?page=1&per_page=100').reply(200, TEST_TEAM_INFO);
 githubApi.post(getCommentUrl(PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER)).reply(200);
 
 // BUILD_INFO errors

aio/aio-builds-setup/dockerbuild/scripts-js/lib/verify-setup/nginx.e2e.ts

@@ -3,6 +3,7 @@ import * as path from 'path';
 import {rm} from 'shelljs';
 import {AIO_BUILDS_DIR, AIO_NGINX_HOSTNAME, AIO_NGINX_PORT_HTTP, AIO_NGINX_PORT_HTTPS} from '../common/env-variables';
 import {computeShortSha} from '../common/utils';
+import {PrNums} from './constants';
 import {helper as h} from './helper';
 import {customMatchers} from './jasmine-custom-matchers';
 
@@ -252,6 +253,42 @@ describe(`nginx`, () => {
     });
 
 
+    describe(`${host}/can-have-public-preview`, () => {
+      const baseUrl = `${scheme}://${host}/can-have-public-preview`;
+
+
+      it('should disallow non-GET requests', async () => {
+        await Promise.all([
+          h.runCmd(`curl -iLX POST ${baseUrl}/42`).then(h.verifyResponse([405, 'Not Allowed'])),
+          h.runCmd(`curl -iLX PUT ${baseUrl}/42`).then(h.verifyResponse([405, 'Not Allowed'])),
+          h.runCmd(`curl -iLX PATCH ${baseUrl}/42`).then(h.verifyResponse([405, 'Not Allowed'])),
+          h.runCmd(`curl -iLX DELETE ${baseUrl}/42`).then(h.verifyResponse([405, 'Not Allowed'])),
+        ]);
+      });
+
+
+      it('should pass requests through to the preview server', async () => {
+        await h.runCmd(`curl -iLX GET ${baseUrl}/${PrNums.CHANGED_FILES_ERROR}`).
+          then(h.verifyResponse(500, /CHANGED_FILES_ERROR/));
+      });
+
+
+      it('should respond with 404 for unknown paths', async () => {
+        const cmdPrefix = `curl -iLX GET ${baseUrl}`;
+
+        await Promise.all([
+          h.runCmd(`${cmdPrefix}/foo/42`).then(h.verifyResponse(404)),
+          h.runCmd(`${cmdPrefix}-foo/42`).then(h.verifyResponse(404)),
+          h.runCmd(`${cmdPrefix}nfoo/42`).then(h.verifyResponse(404)),
+          h.runCmd(`${cmdPrefix}/42/foo`).then(h.verifyResponse(404)),
+          h.runCmd(`${cmdPrefix}/f00`).then(h.verifyResponse(404)),
+          h.runCmd(`${cmdPrefix}/`).then(h.verifyResponse(404)),
+        ]);
+      });
+
+    });
+
+
     describe(`${host}/circle-build`, () => {
 
       it('should disallow non-POST requests', done => {
@@ -287,6 +324,7 @@ describe(`nginx`, () => {
           h.runCmd(`${cmdPrefix}/circle-build/42`).then(h.verifyResponse(404)),
         ]).then(done);
       });
+
     });
 
 

aio/aio-builds-setup/dockerbuild/scripts-js/lib/verify-setup/preview-server.e2e.ts

@@ -18,6 +18,92 @@ describe('preview-server', () => {
   afterEach(() => h.cleanUp());
 
 
+  describe(`${host}/can-have-public-preview`, () => {
+    const curl = makeCurl(`${host}/can-have-public-preview`, {
+      defaultData: null,
+      defaultExtraPath: `/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}`,
+      defaultHeaders: [],
+      defaultMethod: 'GET',
+    });
+
+
+    it('should disallow non-GET requests', async () => {
+      const bodyRegex = /^Unknown resource in request/;
+
+      await Promise.all([
+        curl({method: 'POST'}).then(h.verifyResponse(404, bodyRegex)),
+        curl({method: 'PUT'}).then(h.verifyResponse(404, bodyRegex)),
+        curl({method: 'PATCH'}).then(h.verifyResponse(404, bodyRegex)),
+        curl({method: 'DELETE'}).then(h.verifyResponse(404, bodyRegex)),
+      ]);
+    });
+
+
+    it('should respond with 404 for unknown paths', async () => {
+      const bodyRegex = /^Unknown resource in request/;
+
+      await Promise.all([
+        curl({extraPath: `/foo/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}`}).then(h.verifyResponse(404, bodyRegex)),
+        curl({extraPath: `-foo/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}`}).then(h.verifyResponse(404, bodyRegex)),
+        curl({extraPath: `nfoo/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}`}).then(h.verifyResponse(404, bodyRegex)),
+        curl({extraPath: `/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}/foo`}).then(h.verifyResponse(404, bodyRegex)),
+        curl({extraPath: '/f00'}).then(h.verifyResponse(404, bodyRegex)),
+        curl({extraPath: '/'}).then(h.verifyResponse(404, bodyRegex)),
+      ]);
+    });
+
+
+    it('should respond with 500 if checking for significant file changes fails', async () => {
+      await Promise.all([
+        curl({extraPath: `/${PrNums.CHANGED_FILES_404}`}).then(h.verifyResponse(500, /CHANGED_FILES_404/)),
+        curl({extraPath: `/${PrNums.CHANGED_FILES_ERROR}`}).then(h.verifyResponse(500, /CHANGED_FILES_ERROR/)),
+      ]);
+    });
+
+
+    it('should respond with 200 (false) if no significant files were touched', async () => {
+      const expectedResponse = JSON.stringify({
+        canHavePublicPreview: false,
+        reason: 'No significant files touched.',
+      });
+
+      await curl({extraPath: `/${PrNums.CHANGED_FILES_NONE}`}).then(h.verifyResponse(200, expectedResponse));
+    });
+
+
+    it('should respond with 500 if checking "trusted" status fails', async () => {
+      await curl({extraPath: `/${PrNums.TRUST_CHECK_ERROR}`}).then(h.verifyResponse(500, 'TRUST_CHECK_ERROR'));
+    });
+
+
+    it('should respond with 200 (false) if the PR is not automatically verifiable as "trusted"', async () => {
+      const expectedResponse = JSON.stringify({
+        canHavePublicPreview: false,
+        reason: 'Not automatically verifiable as \\"trusted\\".',
+      });
+
+      await Promise.all([
+        curl({extraPath: `/${PrNums.TRUST_CHECK_INACTIVE_TRUSTED_USER}`}).then(h.verifyResponse(200, expectedResponse)),
+        curl({extraPath: `/${PrNums.TRUST_CHECK_UNTRUSTED}`}).then(h.verifyResponse(200, expectedResponse)),
+      ]);
+    });
+
+
+    it('should respond with 200 (true) if the PR can have a public preview', async () => {
+      const expectedResponse = JSON.stringify({
+        canHavePublicPreview: true,
+        reason: null,
+      });
+
+      await Promise.all([
+        curl({extraPath: `/${PrNums.TRUST_CHECK_ACTIVE_TRUSTED_USER}`}).then(h.verifyResponse(200, expectedResponse)),
+        curl({extraPath: `/${PrNums.TRUST_CHECK_TRUSTED_LABEL}`}).then(h.verifyResponse(200, expectedResponse)),
+      ]);
+    });
+
+  });
+
+
   describe(`${host}/circle-build`, () => {
 
     const curl = makeCurl(`${host}/circle-build`);

aio/aio-builds-setup/dockerbuild/scripts-js/package.json

@@ -7,43 +7,49 @@
   "license": "MIT",
   "scripts": {
     "prebuild": "yarn clean-dist",
-    "build": "tsc",
-    "build-watch": "yarn build --watch",
+    "build": "yarn ~~build",
+    "prebuild-watch": "yarn prebuild",
+    "build-watch": "yarn ~~build-watch",
     "clean-dist": "node --eval \"require('shelljs').rm('-rf', 'dist')\"",
-    "dev": "concurrently --kill-others --raw --success first \"yarn build-watch\" \"yarn test-watch\"",
+    "predev": "yarn build || true",
+    "dev": "run-p ~~build-watch ~~test-watch",
     "lint": "tslint --project tsconfig.json",
-    "pre~~test-only": "yarn lint",
-    "~~test-only": "node dist/test",
     "pretest": "yarn build",
     "test": "yarn ~~test-only",
-    "pretest-watch": "yarn build",
-    "test-watch": "nodemon --exec \"yarn ~~test-only\" --watch dist"
+    "pretest-watch": "yarn pretest",
+    "test-watch": "yarn ~~test-watch",
+    "~~build": "tsc",
+    "~~build-watch": "yarn ~~build --watch",
+    "pre~~test-only": "yarn lint",
+    "~~test-only": "node dist/test",
+    "~~test-watch": "nodemon --delay 1 --exec \"yarn ~~test-only\" --watch dist"
   },
   "dependencies": {
-    "body-parser": "^1.18.2",
+    "body-parser": "^1.18.3",
     "delete-empty": "^2.0.0",
-    "express": "^4.15.4",
-    "jasmine": "^2.8.0",
-    "nock": "^9.2.5",
-    "node-fetch": "^2.1.2",
-    "shelljs": "^0.8.1",
-    "tar-stream": "^1.6.0",
-    "tslib": "^1.7.1"
+    "express": "^4.16.3",
+    "jasmine": "^3.2.0",
+    "nock": "^9.6.1",
+    "node-fetch": "^2.2.0",
+    "shelljs": "^0.8.2",
+    "source-map-support": "^0.5.9",
+    "tar-stream": "^1.6.1",
+    "tslib": "^1.9.3"
   },
   "devDependencies": {
-    "@types/body-parser": "^1.16.5",
-    "@types/express": "^4.0.37",
-    "@types/jasmine": "^2.6.0",
-    "@types/nock": "^9.1.3",
-    "@types/node": "^8.0.30",
-    "@types/node-fetch": "^1.6.8",
+    "@types/body-parser": "^1.17.0",
+    "@types/express": "^4.16.0",
+    "@types/jasmine": "^2.8.8",
+    "@types/nock": "^9.3.0",
+    "@types/node": "^10.9.2",
+    "@types/node-fetch": "^2.1.2",
     "@types/shelljs": "^0.8.0",
-    "@types/supertest": "^2.0.3",
-    "concurrently": "^3.5.0",
-    "nodemon": "^1.12.1",
-    "supertest": "^3.0.0",
-    "tslint": "^5.7.0",
-    "tslint-jasmine-noSkipOrFocus": "^1.0.8",
-    "typescript": "^2.5.2"
+    "@types/supertest": "^2.0.5",
+    "nodemon": "^1.18.3",
+    "npm-run-all": "^4.1.5",
+    "supertest": "^3.1.0",
+    "tslint": "^5.11.0",
+    "tslint-jasmine-noSkipOrFocus": "^1.0.9",
+    "typescript": "^3.0.1"
   }
 }

aio/aio-builds-setup/dockerbuild/scripts-js/test/clean-up/build-cleaner.spec.ts

@@ -5,25 +5,28 @@ import * as shell from 'shelljs';
 import {BuildCleaner} from '../../lib/clean-up/build-cleaner';
 import {HIDDEN_DIR_PREFIX} from '../../lib/common/constants';
 import {GithubPullRequests} from '../../lib/common/github-pull-requests';
+import {Logger} from '../../lib/common/utils';
 
 const EXISTING_BUILDS = [10, 20, 30, 40];
 const EXISTING_DOWNLOADS = [
-  'downloads/10-ABCDEF0-build.zip',
-  'downloads/10-1234567-build.zip',
-  'downloads/20-ABCDEF0-build.zip',
-  'downloads/20-1234567-build.zip',
+  '10-ABCDEF0-build.zip',
+  '10-1234567-build.zip',
+  '20-ABCDEF0-build.zip',
+  '20-1234567-build.zip',
 ];
 const OPEN_PRS = [10, 40];
 const ANY_DATE = jasmine.any(String);
 
 // Tests
 describe('BuildCleaner', () => {
+  let loggerErrorSpy: jasmine.Spy;
+  let loggerLogSpy: jasmine.Spy;
   let cleaner: BuildCleaner;
 
   beforeEach(() => {
-    spyOn(console, 'error');
-    spyOn(console, 'log');
-    cleaner = new BuildCleaner('/foo/bar', 'baz', 'qux', '12345', 'downloads', 'build.zip');
+    loggerErrorSpy = spyOn(Logger.prototype, 'error');
+    loggerLogSpy = spyOn(Logger.prototype, 'log');
+    cleaner = new BuildCleaner('/foo/bar', 'baz', 'qux', '12345', '/downloads', 'build.zip');
   });
 
   describe('constructor()', () => {
@@ -51,11 +54,13 @@ describe('BuildCleaner', () => {
         toThrowError('Missing or empty required parameter \'githubToken\'!');
     });
 
+
     it('should throw if \'downloadsDir\' is empty', () => {
       expect(() => new BuildCleaner('/foo/bar', 'baz', 'qux', '12345', '', 'build.zip')).
         toThrowError('Missing or empty required parameter \'downloadsDir\'!');
     });
 
+
     it('should throw if \'artifactPath\' is empty', () => {
       expect(() => new BuildCleaner('/foo/bar', 'baz', 'qux', '12345', 'downloads', '')).
         toThrowError('Missing or empty required parameter \'artifactPath\'!');
@@ -85,9 +90,12 @@ describe('BuildCleaner', () => {
     });
 
 
-    it('should return a promise', () => {
+    it('should return a promise', async () => {
       const promise = cleaner.cleanUp();
       expect(promise).toEqual(jasmine.any(Promise));
+
+      // Do not complete the test and release the spies synchronously, to avoid running the actual implementations.
+      await promise;
     });
 
 
@@ -160,6 +168,7 @@ describe('BuildCleaner', () => {
       }
     });
 
+
     it('should reject if \'removeUnnecessaryDownloads()\' rejects', async () => {
       try {
         cleanerRemoveUnnecessaryDownloadsSpy.and.callFake(() => Promise.reject('Test'));
@@ -168,6 +177,7 @@ describe('BuildCleaner', () => {
         expect(err).toBe('Test');
       }
     });
+
   });
 
 
@@ -277,11 +287,14 @@ describe('BuildCleaner', () => {
       prDeferred.resolve([{id: 0, number: 1}, {id: 1, number: 2}, {id: 2, number: 3}]);
     });
 
+
     it('should log the number of open PRs', () => {
       promise.then(prNumbers => {
-        expect(console.log).toHaveBeenCalledWith(ANY_DATE, 'BuildCleaner:        ', `Open pull requests: ${prNumbers}`);
+        expect(loggerLogSpy).toHaveBeenCalledWith(
+          ANY_DATE, 'BuildCleaner:        ', `Open pull requests: ${prNumbers}`);
       });
     });
+
   });
 
 
@@ -301,9 +314,9 @@ describe('BuildCleaner', () => {
     });
 
 
-    it('should get the contents of the builds directory', () => {
+    it('should get the contents of the downloads directory', () => {
       expect(fsReaddirSpy).toHaveBeenCalled();
-      expect(fsReaddirSpy.calls.argsFor(0)[0]).toBe('downloads');
+      expect(fsReaddirSpy.calls.argsFor(0)[0]).toBe('/downloads');
     });
 
 
@@ -317,7 +330,7 @@ describe('BuildCleaner', () => {
     });
 
 
-    it('should resolve with the returned files (as numbers)', done => {
+    it('should resolve with the returned file names', done => {
       promise.then(result => {
         expect(result).toEqual(EXISTING_DOWNLOADS);
         done();
@@ -383,8 +396,7 @@ describe('BuildCleaner', () => {
 
       cleaner.removeDir('/foo/bar');
 
-      expect(console.error).toHaveBeenCalledWith(
-        jasmine.any(String), 'BuildCleaner:        ', 'ERROR: Unable to remove \'/foo/bar\' due to:', 'Test');
+      expect(loggerErrorSpy).toHaveBeenCalledWith('ERROR: Unable to remove \'/foo/bar\' due to:', 'Test');
     });
 
   });
@@ -401,8 +413,8 @@ describe('BuildCleaner', () => {
     it('should log the number of existing builds and builds to be removed', () => {
       cleaner.removeUnnecessaryBuilds([1, 2, 3], [3, 4, 5, 6]);
 
-      expect(console.log).toHaveBeenCalledWith(ANY_DATE, 'BuildCleaner:        ', 'Existing builds: 3');
-      expect(console.log).toHaveBeenCalledWith(ANY_DATE, 'BuildCleaner:        ', 'Removing 2 build(s): 1, 2');
+      expect(loggerLogSpy).toHaveBeenCalledWith('Existing builds: 3');
+      expect(loggerLogSpy).toHaveBeenCalledWith('Removing 2 build(s): 1, 2');
     });
 
 
@@ -454,25 +466,36 @@ describe('BuildCleaner', () => {
 
 
   describe('removeUnnecessaryDownloads()', () => {
+    let shellRmSpy: jasmine.Spy;
+
     beforeEach(() => {
-      spyOn(shell, 'rm');
+      shellRmSpy = spyOn(shell, 'rm');
+    });
+
+
+    it('should log the number of existing downloads and downloads to be removed', () => {
+      cleaner.removeUnnecessaryDownloads(EXISTING_DOWNLOADS, OPEN_PRS);
+
+      expect(loggerLogSpy).toHaveBeenCalledWith('Existing downloads: 4');
+      expect(loggerLogSpy).toHaveBeenCalledWith('Removing 2 download(s): 20-ABCDEF0-build.zip, 20-1234567-build.zip');
+    });
+
+
+    it('should construct full paths to directories (by prepending \'downloadsDir\')', () => {
+      cleaner.removeUnnecessaryDownloads(['dl-1', 'dl-2', 'dl-3'], []);
+
+      expect(shellRmSpy).toHaveBeenCalledWith(normalize('/downloads/dl-1'));
+      expect(shellRmSpy).toHaveBeenCalledWith(normalize('/downloads/dl-2'));
+      expect(shellRmSpy).toHaveBeenCalledWith(normalize('/downloads/dl-3'));
     });
 
 
     it('should remove the downloads that do not correspond to open PRs', () => {
       cleaner.removeUnnecessaryDownloads(EXISTING_DOWNLOADS, OPEN_PRS);
-      expect(shell.rm).toHaveBeenCalledTimes(2);
-      expect(shell.rm).toHaveBeenCalledWith('downloads/20-ABCDEF0-build.zip');
-      expect(shell.rm).toHaveBeenCalledWith('downloads/20-1234567-build.zip');
+      expect(shellRmSpy).toHaveBeenCalledTimes(2);
+      expect(shellRmSpy).toHaveBeenCalledWith(normalize('/downloads/20-ABCDEF0-build.zip'));
+      expect(shellRmSpy).toHaveBeenCalledWith(normalize('/downloads/20-1234567-build.zip'));
     });
 
-
-    it('should log the number of existing builds and builds to be removed', () => {
-      cleaner.removeUnnecessaryDownloads(EXISTING_DOWNLOADS, OPEN_PRS);
-
-      expect(console.log).toHaveBeenCalledWith(ANY_DATE, 'BuildCleaner:        ', 'Existing downloads: 4');
-      expect(console.log).toHaveBeenCalledWith(ANY_DATE, 'BuildCleaner:        ',
-        'Removing 2 download(s): downloads/20-ABCDEF0-build.zip, downloads/20-1234567-build.zip');
-    });
   });
 });

aio/aio-builds-setup/dockerbuild/scripts-js/test/common/github-api.spec.ts

@@ -126,8 +126,8 @@ describe('GithubApi', () => {
       (api as any).getPaginated('/foo/bar');
       (api as any).getPaginated('/foo/bar', {baz: 'qux'});
 
-      expect(api.get).toHaveBeenCalledWith('/foo/bar', {page: 0, per_page: 100});
-      expect(api.get).toHaveBeenCalledWith('/foo/bar', {baz: 'qux', page: 0, per_page: 100});
+      expect(api.get).toHaveBeenCalledWith('/foo/bar', {page: 1, per_page: 100});
+      expect(api.get).toHaveBeenCalledWith('/foo/bar', {baz: 'qux', page: 1, per_page: 100});
     });
 
 
@@ -162,9 +162,9 @@ describe('GithubApi', () => {
         const paramsForPage = (page: number) => ({baz: 'qux', page, per_page: 100});
 
         expect(apiGetSpy).toHaveBeenCalledTimes(3);
-        expect(apiGetSpy.calls.argsFor(0)).toEqual(['/foo/bar', paramsForPage(0)]);
-        expect(apiGetSpy.calls.argsFor(1)).toEqual(['/foo/bar', paramsForPage(1)]);
-        expect(apiGetSpy.calls.argsFor(2)).toEqual(['/foo/bar', paramsForPage(2)]);
+        expect(apiGetSpy.calls.argsFor(0)).toEqual(['/foo/bar', paramsForPage(1)]);
+        expect(apiGetSpy.calls.argsFor(1)).toEqual(['/foo/bar', paramsForPage(2)]);
+        expect(apiGetSpy.calls.argsFor(2)).toEqual(['/foo/bar', paramsForPage(3)]);
 
         expect(data).toEqual(allItems);
 

aio/aio-builds-setup/dockerbuild/scripts-js/test/common/github-pull-requests.spec.ts

@@ -4,13 +4,13 @@ import {GithubPullRequests} from '../../lib/common/github-pull-requests';
 
 // Tests
 describe('GithubPullRequests', () => {
-
   let githubApi: jasmine.SpyObj<GithubApi>;
 
   beforeEach(() => {
     githubApi = jasmine.createSpyObj('githubApi', ['post', 'get', 'getPaginated']);
   });
 
+
   describe('constructor()', () => {
 
     it('should throw if \'githubOrg\' is missing or empty', () => {
@@ -95,16 +95,14 @@ describe('GithubPullRequests', () => {
         done();
       });
     });
+
   });
 
 
   describe('fetchAll()', () => {
     let prs: GithubPullRequests;
 
-    beforeEach(() => {
-      prs = new GithubPullRequests(githubApi, 'foo', 'bar');
-      spyOn(console, 'log');
-    });
+    beforeEach(() => prs = new GithubPullRequests(githubApi, 'foo', 'bar'));
 
 
     it('should call \'getPaginated()\' with the correct pathname and params', () => {
@@ -131,8 +129,10 @@ describe('GithubPullRequests', () => {
       githubApi.getPaginated.and.returnValue('Test');
       expect(prs.fetchAll() as any).toBe('Test');
     });
+
   });
 
+
   describe('fetchFiles()', () => {
     let prs: GithubPullRequests;
 
@@ -141,21 +141,21 @@ describe('GithubPullRequests', () => {
     });
 
 
-    it('should make a GET request to GitHub with the correct pathname', () => {
+    it('should make a paginated GET request to GitHub with the correct pathname', () => {
       prs.fetchFiles(42);
-      expect(githubApi.get).toHaveBeenCalledWith('/repos/foo/bar/pulls/42/files');
+      expect(githubApi.getPaginated).toHaveBeenCalledWith('/repos/foo/bar/pulls/42/files');
     });
 
 
     it('should resolve with the data returned from GitHub', done => {
-      const expected: any = [{ sha: 'ABCDE', filename: 'a/b/c'}, { sha: '12345', filename: 'x/y/z' }];
-      githubApi.get.and.callFake(() => Promise.resolve(expected));
-      prs.fetch(42).then(data => {
+      const expected: any = [{sha: 'ABCDE', filename: 'a/b/c'}, {sha: '12345', filename: 'x/y/z'}];
+      githubApi.getPaginated.and.callFake(() => Promise.resolve(expected));
+      prs.fetchFiles(42).then(data => {
         expect(data).toEqual(expected);
         done();
       });
     });
+
   });
 
-
 });

aio/aio-builds-setup/dockerbuild/scripts-js/test/common/utils.spec.ts

@@ -1,4 +1,5 @@
 // Imports
+import {resolve as resolvePath} from 'path';
 import {
   assert,
   assertNotMissingOrEmpty,
@@ -6,6 +7,7 @@ import {
   computeShortSha,
   getEnvVar,
   getPrInfoFromDownloadPath,
+  Logger,
 } from '../../lib/common/utils';
 
 // Tests
@@ -19,6 +21,7 @@ describe('utils', () => {
     });
   });
 
+
   describe('assert', () => {
     it('should throw if passed a false value', () => {
       expect(() => assert(false, 'error message')).toThrowError('error message');
@@ -29,6 +32,7 @@ describe('utils', () => {
     });
   });
 
+
   describe('computeArtifactDownloadPath', () => {
     it('should compute an absolute path based on the artifact info provided', () => {
       const downloadDir = '/a/b/c';
@@ -36,10 +40,11 @@ describe('utils', () => {
       const sha = 'ABCDEF1234567';
       const artifactPath = 'a/path/to/file.zip';
       const path = computeArtifactDownloadPath(downloadDir, pr, sha, artifactPath);
-      expect(path).toEqual('/a/b/c/123-ABCDEF1-file.zip');
+      expect(path).toBe(resolvePath('/a/b/c/123-ABCDEF1-file.zip'));
     });
   });
 
+
   describe('getPrInfoFromDownloadPath', () => {
     it('should extract the PR and SHA from the file path', () => {
       const {pr, sha} = getPrInfoFromDownloadPath('a/b/c/12345-ABCDE-artifact.zip');
@@ -48,6 +53,7 @@ describe('utils', () => {
     });
   });
 
+
   describe('assertNotMissingOrEmpty()', () => {
 
     it('should throw if passed an empty value', () => {
@@ -122,4 +128,79 @@ describe('utils', () => {
 
   });
 
+
+  describe('Logger', () => {
+    let consoleErrorSpy: jasmine.Spy;
+    let consoleInfoSpy: jasmine.Spy;
+    let consoleLogSpy: jasmine.Spy;
+    let consoleWarnSpy: jasmine.Spy;
+    let logger: Logger;
+
+    beforeEach(() => {
+      consoleErrorSpy = spyOn(console, 'error');
+      consoleInfoSpy = spyOn(console, 'info');
+      consoleLogSpy = spyOn(console, 'log');
+      consoleWarnSpy = spyOn(console, 'warn');
+
+      logger = new Logger('TestScope');
+    });
+
+
+    it('should delegate to `console`', () => {
+      logger.error('foo');
+      expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
+      expect(consoleErrorSpy.calls.argsFor(0)).toContain('foo');
+
+      logger.info('bar');
+      expect(consoleInfoSpy).toHaveBeenCalledTimes(1);
+      expect(consoleInfoSpy.calls.argsFor(0)).toContain('bar');
+
+      logger.log('baz');
+      expect(consoleLogSpy).toHaveBeenCalledTimes(1);
+      expect(consoleLogSpy.calls.argsFor(0)).toContain('baz');
+
+      logger.warn('qux');
+      expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
+      expect(consoleWarnSpy.calls.argsFor(0)).toContain('qux');
+    });
+
+
+    it('should prepend messages with the current date and logger\'s scope', () => {
+      const mockDate = new Date(1337);
+      const expectedDateStr = `[${mockDate}]`;
+      const expectedScopeStr = 'TestScope:           ';
+
+      jasmine.clock().mockDate(mockDate);
+      jasmine.clock().withMock(() => {
+        logger.error();
+        logger.info();
+        logger.log();
+        logger.warn();
+      });
+
+      expect(consoleErrorSpy).toHaveBeenCalledWith(expectedDateStr, expectedScopeStr);
+      expect(consoleInfoSpy).toHaveBeenCalledWith(expectedDateStr, expectedScopeStr);
+      expect(consoleLogSpy).toHaveBeenCalledWith(expectedDateStr, expectedScopeStr);
+      expect(consoleWarnSpy).toHaveBeenCalledWith(expectedDateStr, expectedScopeStr);
+    });
+
+
+    it('should pass all arguments to `console`', () => {
+      const someString = jasmine.any(String);
+
+      logger.error('foo1', 'foo2');
+      expect(consoleErrorSpy).toHaveBeenCalledWith(someString, someString, 'foo1', 'foo2');
+
+      logger.info('bar1', 'bar2');
+      expect(consoleInfoSpy).toHaveBeenCalledWith(someString, someString, 'bar1', 'bar2');
+
+      logger.log('baz1', 'baz2');
+      expect(consoleLogSpy).toHaveBeenCalledWith(someString, someString, 'baz1', 'baz2');
+
+      logger.warn('qux1', 'qux2');
+      expect(consoleWarnSpy).toHaveBeenCalledWith(someString, someString, 'qux1', 'qux2');
+    });
+
+  });
+
 });

aio/aio-builds-setup/dockerbuild/scripts-js/test/helpers.ts

@@ -1,6 +0,0 @@
-declare namespace jasmine {
-  export interface DoneFn extends Function {
-    (): void;
-    fail: (message: Error | string) => void;
-  }
-}

aio/aio-builds-setup/dockerbuild/scripts-js/test/index.ts

@@ -3,5 +3,4 @@ import {runTests} from '../lib/common/run-tests';
 
 // Run
 const specFiles = [`${__dirname}/**/*.spec.js`];
-const helpers = [`${__dirname}/helpers.js`];
-runTests(specFiles, helpers);
+runTests(specFiles);

aio/aio-builds-setup/dockerbuild/scripts-js/test/preview-server/build-creator.spec.ts

@@ -5,6 +5,7 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as shell from 'shelljs';
 import {SHORT_SHA_LEN} from '../../lib/common/constants';
+import {Logger} from '../../lib/common/utils';
 import {BuildCreator} from '../../lib/preview-server/build-creator';
 import {ChangedPrVisibilityEvent, CreatedBuildEvent} from '../../lib/preview-server/build-events';
 import {PreviewServerError} from '../../lib/preview-server/preview-error';
@@ -491,7 +492,7 @@ describe('BuildCreator', () => {
     beforeEach(() => {
       cpExecCbs = [];
 
-      consoleWarnSpy = spyOn(console, 'warn');
+      consoleWarnSpy = spyOn(Logger.prototype, 'warn');
       shellChmodSpy = spyOn(shell, 'chmod');
       shellRmSpy = spyOn(shell, 'rm');
       cpExecSpy = spyOn(cp, 'exec').and.callFake((_: string, cb: (...args: any[]) => void) => cpExecCbs.push(cb));
@@ -513,8 +514,7 @@ describe('BuildCreator', () => {
 
     it('should log (as a warning) any stderr output if extracting succeeded', done => {
       (bc as any).extractArchive('foo', 'bar').
-        then(() => expect(consoleWarnSpy)
-          .toHaveBeenCalledWith(jasmine.any(String), 'BuildCreator:        ', 'This is stderr')).
+        then(() => expect(consoleWarnSpy).toHaveBeenCalledWith('This is stderr')).
         then(done);
 
       cpExecCbs[0](null, 'This is stdout', 'This is stderr');

aio/aio-builds-setup/dockerbuild/scripts-js/test/preview-server/build-retriever.spec.ts

@@ -1,11 +1,13 @@
 import * as fs from 'fs';
 import * as nock from 'nock';
+import {resolve as resolvePath} from 'path';
 import {BuildInfo, CircleCiApi} from '../../lib/common/circle-ci-api';
+import {Logger} from '../../lib/common/utils';
 import {BuildRetriever} from '../../lib/preview-server/build-retriever';
 
 describe('BuildRetriever', () => {
   const MAX_DOWNLOAD_SIZE = 10000;
-  const DOWNLOAD_DIR = '/DOWNLOAD/DIR';
+  const DOWNLOAD_DIR = resolvePath('/DOWNLOAD/DIR');
   const BASE_URL = 'http://test.com';
   const ARTIFACT_PATH = '/some/path/build.zip';
 
@@ -29,10 +31,6 @@ describe('BuildRetriever', () => {
       vcs_revision: 'COMMIT',
     };
 
-    spyOn(console, 'log');
-    spyOn(console, 'warn');
-    spyOn(console, 'error');
-
     api = new CircleCiApi('ORG', 'REPO', 'TOKEN');
     spyOn(api, 'getBuildInfo').and.callFake(() => Promise.resolve(BUILD_INFO));
     getBuildArtifactUrlSpy = spyOn(api, 'getBuildArtifactUrl')
@@ -91,6 +89,7 @@ describe('BuildRetriever', () => {
     let retriever: BuildRetriever;
 
     beforeEach(() => {
+      spyOn(Logger.prototype, 'warn');
       retriever = new BuildRetriever(api, MAX_DOWNLOAD_SIZE, DOWNLOAD_DIR);
     });
 
@@ -133,11 +132,14 @@ describe('BuildRetriever', () => {
 
     it('should write the artifact file to disk', async () => {
       const artifactRequest = nock(BASE_URL).get(ARTIFACT_PATH).reply(200, ARTIFACT_CONTENTS);
+      const downloadPath = resolvePath(`${DOWNLOAD_DIR}/777-COMMIT-build.zip`);
+
       await retriever.downloadBuildArtifact(12345, 777, 'COMMIT', ARTIFACT_PATH);
-      expect(writeFileSpy)
-        .toHaveBeenCalledWith(`${DOWNLOAD_DIR}/777-COMMIT-build.zip`, jasmine.any(Buffer), jasmine.any(Function));
+      expect(writeFileSpy).toHaveBeenCalledWith(downloadPath, jasmine.any(Buffer), jasmine.any(Function));
+
       const buffer: Buffer = writeFileSpy.calls.mostRecent().args[1];
       expect(buffer.toString()).toEqual(ARTIFACT_CONTENTS);
+
       artifactRequest.done();
     });
 

aio/aio-builds-setup/dockerbuild/scripts-js/test/preview-server/preview-server-factory.spec.ts

@@ -2,11 +2,11 @@
 import * as express from 'express';
 import * as http from 'http';
 import * as supertest from 'supertest';
-import {promisify} from 'util';
 import {CircleCiApi} from '../../lib/common/circle-ci-api';
 import {GithubApi} from '../../lib/common/github-api';
 import {GithubPullRequests} from '../../lib/common/github-pull-requests';
 import {GithubTeams} from '../../lib/common/github-teams';
+import {Logger} from '../../lib/common/utils';
 import {BuildCreator} from '../../lib/preview-server/build-creator';
 import {ChangedPrVisibilityEvent, CreatedBuildEvent} from '../../lib/preview-server/build-events';
 import {BuildRetriever, GithubInfo} from '../../lib/preview-server/build-retriever';
@@ -38,15 +38,18 @@ describe('PreviewServerFactory', () => {
     significantFilesPattern: '^(?:aio|packages)\\/(?!.*[._]spec\\.[jt]s$)',
     trustedPrLabel: 'trusted: pr-label',
   };
+  let loggerErrorSpy: jasmine.Spy;
+  let loggerInfoSpy: jasmine.Spy;
+  let loggerLogSpy: jasmine.Spy;
 
   // Helpers
   const createPreviewServer = (partialConfig: Partial<PreviewServerConfig> = {}) =>
     PreviewServerFactory.create({...defaultConfig, ...partialConfig});
 
   beforeEach(() => {
-    spyOn(console, 'error');
-    spyOn(console, 'info');
-    spyOn(console, 'log');
+    loggerErrorSpy = spyOn(Logger.prototype, 'error');
+    loggerInfoSpy = spyOn(Logger.prototype, 'info');
+    loggerLogSpy = spyOn(Logger.prototype, 'log');
   });
 
   describe('create()', () => {
@@ -140,11 +143,10 @@ describe('PreviewServerFactory', () => {
       const server = createPreviewServer();
       server.address = () => ({address: 'foo', family: '', port: 1337});
 
-      expect(console.info).not.toHaveBeenCalled();
+      expect(loggerInfoSpy).not.toHaveBeenCalled();
 
       server.emit('listening');
-      expect(console.info).toHaveBeenCalledWith(
-        jasmine.any(String), 'PreviewServer:       ', 'Up and running (and listening on foo:1337)...');
+      expect(loggerInfoSpy).toHaveBeenCalledWith('Up and running (and listening on foo:1337)...');
     });
 
   });
@@ -241,10 +243,6 @@ describe('PreviewServerFactory', () => {
     let buildCreator: BuildCreator;
     let agent: supertest.SuperTest<supertest.Test>;
 
-    // Helpers
-    const promisifyRequest = async (req: supertest.Request) => await promisify(req.end.bind(req))();
-    const verifyRequests = async (reqs: supertest.Request[]) => await Promise.all(reqs.map(promisifyRequest));
-
     beforeEach(() => {
       const circleCiApi = new CircleCiApi(defaultConfig.githubOrg, defaultConfig.githubRepo,
                                           defaultConfig.circleCiToken);
@@ -257,14 +255,15 @@ describe('PreviewServerFactory', () => {
       buildCreator = new BuildCreator(defaultConfig.buildsDir);
 
       const middleware = PreviewServerFactory.createMiddleware(buildRetriever, buildVerifier, buildCreator,
-                                                              defaultConfig);
+                                                               defaultConfig);
       agent = supertest.agent(middleware);
     });
 
+
     describe('GET /health-check', () => {
 
       it('should respond with 200', async () => {
-        await verifyRequests([
+        await Promise.all([
           agent.get('/health-check').expect(200),
           agent.get('/health-check/').expect(200),
         ]);
@@ -272,7 +271,7 @@ describe('PreviewServerFactory', () => {
 
 
       it('should respond with 404 for non-GET requests', async () => {
-        await verifyRequests([
+        await Promise.all([
           agent.put('/health-check').expect(404),
           agent.post('/health-check').expect(404),
           agent.patch('/health-check').expect(404),
@@ -282,7 +281,7 @@ describe('PreviewServerFactory', () => {
 
 
       it('should respond with 404 if the path does not match exactly', async () => {
-        await verifyRequests([
+        await Promise.all([
           agent.get('/health-check/foo').expect(404),
           agent.get('/health-check-foo').expect(404),
           agent.get('/health-checknfoo').expect(404),
@@ -294,7 +293,104 @@ describe('PreviewServerFactory', () => {
 
     });
 
-    describe('/circle-build', () => {
+
+    describe('GET /can-have-public-preview/<pr>', () => {
+      const baseUrl = '/can-have-public-preview';
+      const pr = 777;
+      const url = `${baseUrl}/${pr}`;
+      let bvGetPrIsTrustedSpy: jasmine.Spy;
+      let bvGetSignificantFilesChangedSpy: jasmine.Spy;
+
+      beforeEach(() => {
+        bvGetPrIsTrustedSpy = spyOn(buildVerifier, 'getPrIsTrusted').and.returnValue(Promise.resolve(true));
+        bvGetSignificantFilesChangedSpy = spyOn(buildVerifier, 'getSignificantFilesChanged').
+          and.returnValue(Promise.resolve(true));
+      });
+
+
+      it('should respond with 404 for non-GET requests', async () => {
+        await Promise.all([
+          agent.put(url).expect(404),
+          agent.post(url).expect(404),
+          agent.patch(url).expect(404),
+          agent.delete(url).expect(404),
+        ]);
+      });
+
+
+      it('should respond with 404 if the path does not match exactly', async () => {
+        await Promise.all([
+          agent.get('/can-have-public-preview/42/foo').expect(404),
+          agent.get('/can-have-public-preview-foo/42').expect(404),
+          agent.get('/can-have-public-previewnfoo/42').expect(404),
+          agent.get('/foo/can-have-public-preview/42').expect(404),
+          agent.get('/foo-can-have-public-preview/42').expect(404),
+          agent.get('/fooncan-have-public-preview/42').expect(404),
+        ]);
+      });
+
+
+      it('should respond appropriately if the PR did not touch any significant files', async () => {
+        bvGetSignificantFilesChangedSpy.and.returnValue(Promise.resolve(false));
+
+        const expectedResponse = {canHavePublicPreview: false, reason: 'No significant files touched.'};
+        const expectedLog = `PR:${pr} - Cannot have a public preview, because it did not touch any significant files.`;
+
+        await agent.get(url).expect(200, expectedResponse);
+
+        expect(bvGetSignificantFilesChangedSpy).toHaveBeenCalledWith(pr, jasmine.any(RegExp));
+        expect(bvGetPrIsTrustedSpy).not.toHaveBeenCalled();
+        expect(loggerLogSpy).toHaveBeenCalledWith(expectedLog);
+      });
+
+
+      it('should respond appropriately if the PR is not automatically verifiable as "trusted"', async () => {
+        bvGetPrIsTrustedSpy.and.returnValue(Promise.resolve(false));
+
+        const expectedResponse = {canHavePublicPreview: false, reason: 'Not automatically verifiable as "trusted".'};
+        const expectedLog =
+          `PR:${pr} - Cannot have a public preview, because not automatically verifiable as "trusted".`;
+
+        await agent.get(url).expect(200, expectedResponse);
+
+        expect(bvGetSignificantFilesChangedSpy).toHaveBeenCalledWith(pr, jasmine.any(RegExp));
+        expect(bvGetPrIsTrustedSpy).toHaveBeenCalledWith(pr);
+        expect(loggerLogSpy).toHaveBeenCalledWith(expectedLog);
+      });
+
+
+      it('should respond appropriately if the PR can have a preview', async () => {
+        const expectedResponse = {canHavePublicPreview: true, reason: null};
+        const expectedLog = `PR:${pr} - Can have a public preview.`;
+
+        await agent.get(url).expect(200, expectedResponse);
+
+        expect(bvGetSignificantFilesChangedSpy).toHaveBeenCalledWith(pr, jasmine.any(RegExp));
+        expect(bvGetPrIsTrustedSpy).toHaveBeenCalledWith(pr);
+        expect(loggerLogSpy).toHaveBeenCalledWith(expectedLog);
+      });
+
+
+      it('should respond with error if `getSignificantFilesChanged()` fails', async () => {
+        bvGetSignificantFilesChangedSpy.and.callFake(() => Promise.reject('getSignificantFilesChanged error'));
+
+        await agent.get(url).expect(500, 'getSignificantFilesChanged error');
+        expect(loggerErrorSpy).toHaveBeenCalledWith('Previewability check error', 'getSignificantFilesChanged error');
+      });
+
+
+      it('should respond with error if `getPrIsTrusted()` fails', async () => {
+        const error = new Error('getPrIsTrusted error');
+        bvGetPrIsTrustedSpy.and.callFake(() => { throw error; });
+
+        await agent.get(url).expect(500, 'getPrIsTrusted error');
+        expect(loggerErrorSpy).toHaveBeenCalledWith('Previewability check error', error);
+      });
+
+    });
+
+
+    describe('POST /circle-build', () => {
       let getGithubInfoSpy: jasmine.Spy;
       let getSignificantFilesChangedSpy: jasmine.Spy;
       let downloadBuildArtifactSpy: jasmine.Spy;
@@ -359,8 +455,8 @@ describe('PreviewServerFactory', () => {
         await agent.post(URL).send(BASIC_PAYLOAD).expect(204);
         expect(getGithubInfoSpy).not.toHaveBeenCalled();
         expect(getSignificantFilesChangedSpy).not.toHaveBeenCalled();
-        expect(console.log).toHaveBeenCalledWith(jasmine.any(String), 'PreviewServer:       ',
-        'Build:12345, Job:lint -', 'Skipping preview processing because this is not the "aio_preview" job.');
+        expect(loggerLogSpy).toHaveBeenCalledWith(
+          'Build:12345, Job:lint -', 'Skipping preview processing because this is not the "aio_preview" job.');
         expect(downloadBuildArtifactSpy).not.toHaveBeenCalled();
         expect(getPrIsTrustedSpy).not.toHaveBeenCalled();
         expect(createBuildSpy).not.toHaveBeenCalled();
@@ -371,7 +467,7 @@ describe('PreviewServerFactory', () => {
         await agent.post(URL).send(BASIC_PAYLOAD).expect(204);
         expect(getGithubInfoSpy).toHaveBeenCalledWith(BUILD_NUM);
         expect(getSignificantFilesChangedSpy).toHaveBeenCalledWith(PR, jasmine.any(RegExp));
-        expect(console.log).toHaveBeenCalledWith(jasmine.any(String), 'PreviewServer:       ',
+        expect(loggerLogSpy).toHaveBeenCalledWith(
           'PR:777, Build:12345 - Skipping preview processing because this PR did not touch any significant files.');
         expect(downloadBuildArtifactSpy).not.toHaveBeenCalled();
         expect(getPrIsTrustedSpy).not.toHaveBeenCalled();
@@ -467,7 +563,7 @@ describe('PreviewServerFactory', () => {
 
 
       it('should respond with 404 for non-POST requests', async () => {
-        await verifyRequests([
+        await Promise.all([
           agent.get(url).expect(404),
           agent.put(url).expect(404),
           agent.patch(url).expect(404),
@@ -482,7 +578,7 @@ describe('PreviewServerFactory', () => {
         const request1 = agent.post(url);
         const request2 = agent.post(url).send();
 
-        await verifyRequests([
+        await Promise.all([
           request1.expect(400, responseBody),
           request2.expect(400, responseBody),
         ]);
@@ -495,7 +591,7 @@ describe('PreviewServerFactory', () => {
         const request1 = agent.post(url).send({});
         const request2 = agent.post(url).send({number: null});
 
-        await verifyRequests([
+        await Promise.all([
           request1.expect(400, `${responseBodyPrefix} {}`),
           request2.expect(400, `${responseBodyPrefix} {"number":null}`),
         ]);
@@ -503,7 +599,7 @@ describe('PreviewServerFactory', () => {
 
 
       it('should call \'BuildVerifier#gtPrIsTrusted()\' with the correct arguments', async () => {
-        await promisifyRequest(createRequest(+pr));
+        await createRequest(+pr);
         expect(bvGetPrIsTrustedSpy).toHaveBeenCalledWith(9);
       });
 
@@ -511,9 +607,8 @@ describe('PreviewServerFactory', () => {
       it('should propagate errors from BuildVerifier', async () => {
         bvGetPrIsTrustedSpy.and.callFake(() => Promise.reject('Test'));
 
-        const req = createRequest(+pr).expect(500, 'Test');
+        await createRequest(+pr).expect(500, 'Test');
 
-        await promisifyRequest(req);
         expect(bvGetPrIsTrustedSpy).toHaveBeenCalledWith(9);
         expect(bcUpdatePrVisibilitySpy).not.toHaveBeenCalled();
       });
@@ -522,19 +617,17 @@ describe('PreviewServerFactory', () => {
       it('should call \'BuildCreator#updatePrVisibility()\' with the correct arguments', async () => {
         bvGetPrIsTrustedSpy.and.callFake((pr2: number) => Promise.resolve(pr2 === 42));
 
-        await promisifyRequest(createRequest(24));
+        await createRequest(24);
         expect(bcUpdatePrVisibilitySpy).toHaveBeenCalledWith(24, false);
 
-        await promisifyRequest(createRequest(42));
+        await createRequest(42);
         expect(bcUpdatePrVisibilitySpy).toHaveBeenCalledWith(42, true);
       });
 
 
       it('should propagate errors from BuildCreator', async () => {
         bcUpdatePrVisibilitySpy.and.callFake(() => Promise.reject('Test'));
-
-        const req = createRequest(+pr).expect(500, 'Test');
-        await verifyRequests([req]);
+        await createRequest(+pr).expect(500, 'Test');
       });
 
 
@@ -544,7 +637,7 @@ describe('PreviewServerFactory', () => {
           bvGetPrIsTrustedSpy.and.returnValues(Promise.resolve(true), Promise.resolve(false));
 
           const reqs = [4, 2].map(num => createRequest(num).expect(200, http.STATUS_CODES[200]));
-          await verifyRequests(reqs);
+          await Promise.all(reqs);
         });
 
 
@@ -552,7 +645,7 @@ describe('PreviewServerFactory', () => {
           bvGetPrIsTrustedSpy.and.returnValues(Promise.resolve(true), Promise.resolve(false));
 
           const reqs = [4, 2].map(num => createRequest(num, 'labeled').expect(200, http.STATUS_CODES[200]));
-          await verifyRequests(reqs);
+          await Promise.all(reqs);
         });
 
 
@@ -560,14 +653,13 @@ describe('PreviewServerFactory', () => {
           bvGetPrIsTrustedSpy.and.returnValues(Promise.resolve(true), Promise.resolve(false));
 
           const reqs = [4, 2].map(num => createRequest(num, 'unlabeled').expect(200, http.STATUS_CODES[200]));
-          await verifyRequests(reqs);
+          await Promise.all(reqs);
         });
 
 
         it('should respond with 200 (and do nothing) if \'action\' implies no visibility change', async () => {
           const promises = ['foo', 'notlabeled'].
-            map(action => createRequest(+pr, action).expect(200, http.STATUS_CODES[200])).
-            map(promisifyRequest);
+            map(action => createRequest(+pr, action).expect(200, http.STATUS_CODES[200]));
 
           await Promise.all(promises);
           expect(bvGetPrIsTrustedSpy).not.toHaveBeenCalled();
@@ -584,7 +676,7 @@ describe('PreviewServerFactory', () => {
       it('should respond with 404', async () => {
         const responseFor = (method: string) => `Unknown resource in request: ${method.toUpperCase()} /some/url`;
 
-        await verifyRequests([
+        await Promise.all([
           agent.get('/some/url').expect(404, responseFor('get')),
           agent.put('/some/url').expect(404, responseFor('put')),
           agent.post('/some/url').expect(404, responseFor('post')),

aio/aio-builds-setup/dockerbuild/scripts-sh/clean-up.sh

@@ -2,6 +2,7 @@
 set -eu -o pipefail
 
 # Set up env variables
+export AIO_CIRCLE_CI_TOKEN=UNUSED_CIRCLE_CI_TOKEN
 export AIO_GITHUB_TOKEN=$(head -c -1 /aio-secrets/GITHUB_TOKEN 2>/dev/null)
 
 # Run the clean-up

aio/aio-builds-setup/docs/misc--integrate-with-ci.md

@@ -5,4 +5,5 @@ TODO (gkalpak): Add docs. Mention:
 - Testing on CI.
   Relevant files: `scripts/ci/test-aio.sh`, `aio/aio-builds-setup/scripts/test.sh`
 - Deploying from CI.
-  Relevant files: `scripts/ci/deploy.sh`, `aio/scripts/deploy-to-firebase.sh`
+  Relevant files: `.circleci/config.yml`, `scripts/ci/deploy.sh`, `aio/scripts/build-artifacts.sh`,
+  `aio/scripts/deploy-to-firebase.sh`

aio/aio-builds-setup/docs/overview--general.md

@@ -34,34 +34,31 @@ container:
 
 
 ### On CI (CircleCI)
-- Build job completes successfully.
-- The CI script checks whether the build job was initiated by a PR against the angular/angular
-  master branch.
-- The CI script checks whether the PR has touched any files that might affect the angular.io app
-  (currently the `aio/` or `packages/` directories, ignoring spec files).
+- The CI script builds the angular.io project.
 - The CI script gzips and stores the build artifacts in the CI infrastructure.
-- When the build completes CircleCI triggers a webhook on the preview-server.
+- When the build completes, CircleCI triggers a webhook on the preview-server.
 
 More info on how to set things up on CI can be found [here](misc--integrate-with-ci.md).
 
 
 ### Hosting build artifacts
-
 - nginx receives the webhook trigger and passes it through to the preview server.
+- The preview-server runs several preliminary checks to determine whether the request is valid and
+  whether the corresponding PR can have a (public or non-public) preview (more details can be found
+  [here](overview--security-model.md)).
 - The preview-server makes a request to CircleCI for the URL of the AIO build artifacts.
 - The preview-server makes a request to this URL to receive the artifact - failing if the size
   exceeds the specified max file size - and stores it in a temporary location.
-- The preview-server runs several checks to determine whether the request should be accepted and
-  whether it should be publicly accessible or stored for later verification (more details can be
-  found [here](overview--security-model.md)).
+- The preview-server runs more checks to determine whether the preview should be publicly accessible
+  or stored for later verification (more details can be found [here](overview--security-model.md)).
 - The preview-server changes the "visibility" of the associated PR, if necessary. For example, if
   builds for the same PR had been previously deployed as non-public and the current build has been
   automatically verified, all previous builds are made public as well.
   If the PR transitions from "non-public" to "public", the preview-server posts a comment on the
   corresponding PR on GitHub mentioning the SHAs and the links where the previews can be found.
 - The preview-server verifies that it is not trying to overwrite an existing build.
-- The preview-server deploys the artifacts to a sub-directory named after the PR number and the first
-  few characters of the SHA: `<PR>/<SHA>/`
+- The preview-server deploys the artifacts to a sub-directory named after the PR number and the
+  first few characters of the SHA: `<PR>/<SHA>/`
   (Non-publicly accessible PRs will be stored in a different location, but again derived from the PR
   number and SHA.)
 - If the PR is publicly accessible, the preview-server posts a comment on the corresponding PR on
@@ -101,8 +98,8 @@ More info on the possible HTTP status codes and their meaning can be found
 
 ### Removing obsolete artifacts
 In order to avoid flooding the disk with unnecessary build artifacts, there is a cronjob that runs a
-clean-up tasks once a day. The task retrieves all open PRs from GitHub and removes all directories
-that do not correspond with an open PR.
+clean-up task once a day. The task retrieves all open PRs from GitHub and removes all directories
+that do not correspond to an open PR.
 
 
 ### Health-check

aio/aio-builds-setup/docs/overview--http-status-codes.md

@@ -1,8 +1,8 @@
 # Overview - HTTP Status Codes
 
 
-This is a list of all the possible HTTP status codes returned by the nginx and preview servers, along
-with a brief explanation of what they mean:
+This is a list of all the possible HTTP status codes returned by the nginx and preview servers,
+along with a brief explanation of what they mean:
 
 
 ## `http://*.ngbuilds.io/*`
@@ -25,6 +25,23 @@ with a brief explanation of what they mean:
   File not found.
 
 
+## `https://ngbuilds.io/can-have-public-preview/<pr>`
+
+- **200 (OK)**:
+  Whether the PR can have a public preview (based on its author, label, changed files).
+  _Response type:_ JSON
+  _Response format:_
+  ```ts
+  {
+    canHavePublicPreview: boolean,
+    reason: string | null,
+  }
+  ```
+
+- **405 (Method Not Allowed)**:
+  Request method other than GET.
+
+
 ## `https://ngbuilds.io/circle-build`
 
 - **201 (Created)**:

aio/aio-builds-setup/docs/overview--security-model.md

@@ -11,8 +11,8 @@ part of the CI process and serving them publicly.
 
 ## Security objectives
 
-- **Prevent hosting arbitrary content to on servers.**
-  Since there is no restriction on who can submit a PR, we cannot allow arbitrary untrusted PRs'
+- **Prevent hosting arbitrary content on our servers.**
+  Since there is no restriction on who can submit a PR, we cannot allow arbitrary, untrusted PRs'
   build artifacts to be hosted.
 
 - **Prevent overwriting other people's hosted build artifacts.**
@@ -40,40 +40,49 @@ part of the CI process and serving them publicly.
 ### In a nutshell
 The implemented approach can be broken up to the following sub-tasks:
 
-0. Receive notification from CircleCI of a completed build.
-1. Verify that the build is valid and download the artifact.
-2. Fetch the PR's metadata, including author and labels.
-3. Check whether the PR can be automatically verified as "trusted" (based on its author or labels).
-4. If necessary, update the corresponding PR's verification status.
-5. Deploy the artifacts to the corresponding PR's directory.
-6. Prevent overwriting previously deployed artifacts (which ensures that the guarantees established
+1. Receive notification from CircleCI of a completed build.
+2. Verify that the build is valid and can have a preview.
+3. Download the build artifact.
+4. Fetch the PR's metadata, including author and labels.
+5. Check whether the PR can be automatically verified as "trusted" (based on its author or labels).
+6. If necessary, update the corresponding PR's verification status.
+7. Deploy the artifacts to the corresponding PR's directory.
+8. Prevent overwriting previously deployed artifacts (which ensures that the guarantees established
    during deployment will remain valid until the artifacts are removed).
-7. Prevent hosted preview files from accessing anything outside their directory.
+9. Prevent hosted preview files from accessing anything outside their directory.
 
 
 ### Implementation details
 This section describes how each of the aforementioned sub-tasks is accomplished:
 
-0. **Receive notification from CircleCI of a completed build**
+1. **Receive notification from CircleCI of a completed build**
 
   CircleCI is configured to trigger a webhook on our preview-server whenever a build completes.
   The payload contains the number of the build that completed.
 
-1. **Verify that the build is valid and download the artifact.**
+2. **Verify that the build is valid and can have a preview.**
 
    We cannot trust that the data in the webhook trigger is authentic, so we only extract the build
    number and then run a direct query against the CircleCI API to get hold of the real data for
    the given build number.
 
-   If the build was not successful then we ignore this trigger. Otherwise we check that the
-   associated github organisation and repository are what we expect (e.g. angular/angular).
+   We perform a number of preliminary checks:
+   - Was the webhook triggered by the designated CircleCI job (currently `aio_preview`)?
+   - Was the build successful?
+   - Are the associated GitHub organisation and repository what we expect (e.g. `angular/angular`)?
+   - Has the PR touched any files that might affect the angular.io app (currently the `aio/` or
+     `packages/` directories, ignoring spec files)?
 
-   Next we make another call to the CircleCI API to get a list of the URLS for artifacts of that
+   If any of the preliminary checks fails, the process is aborted and not preview is generated.
+
+3. **Download the build artifact.**
+
+   Next we make another call to the CircleCI API to get a list of the URLs for artifacts of that
    build. If there is one that matches the configured artifact path, we download the contents of the
    build artifact and store it in a local folder. This download has a maximum size limit to prevent
    PRs from producing artifacts that are so large they would cause the preview server to crash.
 
-2. **Fetch the PR's metadata, including author and labels**.
+4. **Fetch the PR's metadata, including author and labels**.
 
    Once we have securely downloaded the artifact for a build, we retrieve the PR's metadata -
    including the author's username and the labels - using the
@@ -81,7 +90,7 @@ This section describes how each of the aforementioned sub-tasks is accomplished:
    To avoid rate-limit restrictions, we use a Personal Access Token (issued by
    [@mary-poppins](https://github.com/mary-poppins)).
 
-3. **Check whether the PR can be automatically verified as "trusted"**.
+5. **Check whether the PR can be automatically verified as "trusted"**.
 
    "Trusted" means that we are confident that the build artifacts are suitable for being deployed
    and publicly accessible on the preview server. There are two ways to check that:
@@ -93,31 +102,32 @@ This section describes how each of the aforementioned sub-tasks is accomplished:
       `read:org` scope issued by a user that can "see" the specified GitHub organization.
       Here too, we use the token by @mary-poppins.
 
-4. **If necessary update the corresponding PR's verification status**.
+6. **If necessary update the corresponding PR's verification status**.
 
    Once we have determined whether the PR is considered "trusted", we update its "visibility" (i.e.
    whether it is publicly accessible or not), based on the new verification status. For example, if
    a PR was initially considered "not trusted" but the check triggered by a new build determined
-   otherwise, the PR (and all the previously hosted previews) are made public. It works the same
+   otherwise, the PR (and all the previously downloaded previews) are made public. It works the same
    way if a PR has gone from "trusted" to "not trusted".
 
-5. **Deploy the artifacts to the corresponding PR's directory.**
+7. **Deploy the artifacts to the corresponding PR's directory.**
 
-   With the preceding steps, we have verified that the build artifacts are valid.
-   Additionally, we have determined whether the PR can be trusted to have its previews
-   publicly accessible or whether further verification is necessary. The artifacts will be stored to
-   the PR's directory, but will not be publicly accessible unless the PR has been verified.
-   Essentially, as long as sub-tasks 1, 2 and 3 can be securely accomplished, it is possible to
-   "project" the trust we have in a team's members through the PR to the build artifacts.
+   With the preceding steps, we have verified that the build artifacts are valid. Additionally, we
+   have determined whether the PR can be trusted to have its previews publicly accessible or whether
+   further verification is necessary.
 
-6. **Prevent overwriting previously deployed artifacts**.
+   The artifacts will be stored to the PR's directory, but will not be publicly accessible unless
+   the PR has been verified. Essentially, as long as sub-tasks 2, 3, 4 and 5 can be securely
+   accomplished, it is possible to "project" the trust we have in a team's members through the PR to
+   the build artifacts.
+
+8. **Prevent overwriting previously deployed artifacts**.
 
    In order to enforce this restriction (and ensure that the deployed artifacts' validity is
-   preserved throughout their "lifetime"), the server that handles the artifacts (currently a Node.js
-   Express server) rejects builds that have already been handled.
+   preserved throughout their "lifetime"), the server that handles the artifacts (currently a Node.js Express server) rejects builds that have already been handled.
    _Note: A PR can contain multiple builds; one for each SHA that was built on CircleCI._
 
-7. **Prevent hosted preview files from accessing anything outside their directory.**
+9. **Prevent hosted preview files from accessing anything outside their directory.**
 
    Nginx (which is used to serve the hosted preview) has been configured to not follow symlinks
    outside of the directory where the preview files are stored.
@@ -130,10 +140,10 @@ This section describes how each of the aforementioned sub-tasks is accomplished:
   This means that any secret access keys need only be stored on the preview-server and not on any of
   the CI build infrastructure (e.g. CircleCI).
 
-- Each trusted PR author has full control over the content that is hosted as a preview for their PRs.
-  Part of the security model relies on the trustworthiness of these authors.
+- Each trusted PR author has full control over the content that is hosted as a preview for their
+  PRs. Part of the security model relies on the trustworthiness of these authors.
 
-- Adding the specified label on a PR to mark it as trusted, gives the author full control over
-  the content that is hosted for the specific PR preview (e.g. by pushing more commits to it).
-  The user adding the label is responsible for ensuring that this control is not abused and that
-  the PR is either closed (one way of another) or the access is revoked.
+- Adding the specified label on a PR to mark it as trusted, gives the author full control over the
+  content that is hosted for the specific PR preview (e.g. by pushing more commits to it). The user
+  adding the label is responsible for ensuring that this control is not abused and that the PR is
+  either closed (one way of another) or the access is revoked.

aio/aio-builds-setup/docs/vm-setup--set-up-secrets.md

@@ -8,7 +8,7 @@ Necessary secrets:
 1. `GITHUB_TOKEN`
    - Used for:
      - Retrieving open PRs without rate-limiting.
-     - Retrieving PR author.
+     - Retrieving PR info, such as author, labels, changed files.
      - Retrieving members of the trusted GitHub teams.
      - Posting comments with preview links on PRs.
 
@@ -25,8 +25,9 @@ Necessary secrets:
    - Generate new token with the `public_repo` scope.
 
 2. `CIRCLE_CI_TOKEN`
-   - Visit https://circleci.com/gh/angular/angular/edit#api
-   - Create an API token with `Build Artifacts` scope
+   - Visit https://circleci.com/gh/angular/angular/edit#api.
+   - Create an API token with `Build Artifacts` scope.
+
 
 ## Save secrets on the VM
 

aio/angular.json

@@ -33,7 +33,6 @@
               "src/assets",
               "src/generated",
               "src/app/search/search-worker.js",
-              "src/favicon.ico",
               "src/pwa-manifest.json",
               "src/google385281288605d160.html",
               {
@@ -62,7 +61,8 @@
                   "src": "src/environments/environment.ts",
                   "replaceWith": "src/environments/environment.next.ts"
                 }
-              ]
+              ],
+              "serviceWorker": true
             },
             "stable": {
               "fileReplacements": [
@@ -70,7 +70,8 @@
                   "src": "src/environments/environment.ts",
                   "replaceWith": "src/environments/environment.stable.ts"
                 }
-              ]
+              ],
+              "serviceWorker": true
             },
             "archive": {
               "fileReplacements": [
@@ -78,7 +79,8 @@
                   "src": "src/environments/environment.ts",
                   "replaceWith": "src/environments/environment.archive.ts"
                 }
-              ]
+              ],
+              "serviceWorker": true
             }
           }
         },
@@ -123,7 +125,6 @@
               "src/assets",
               "src/generated",
               "src/app/search/search-worker.js",
-              "src/favicon.ico",
               "src/pwa-manifest.json",
               "src/google385281288605d160.html",
               {

aio/content/examples/animations/e2e/src/app.e2e-spec.ts

@@ -1,351 +1,259 @@
 'use strict'; // necessary for es6 output in node
 
-import { browser, element, by, ElementFinder } from 'protractor';
-import { logging, promise } from 'selenium-webdriver';
+import { browser } from 'protractor';
+import { logging } from 'selenium-webdriver';
+import * as openClose from './open-close.po';
+import * as statusSlider from './status-slider.po';
+import * as toggle from './toggle.po';
+import * as enterLeave from './enter-leave.po';
+import * as auto from './auto.po';
+import * as filterStagger from './filter-stagger.po';
+import * as heroGroups from './hero-groups';
+import { getLinkById, sleepFor } from './util';
 
-/**
- * The tests here basically just checking that the end styles
- * of each animation are in effect.
- *
- * Relies on the Angular testability only becoming stable once
- * animation(s) have finished.
- *
- * Ideally we'd use https://developer.mozilla.org/en-US/docs/Web/API/Document/getAnimations
- * but they're not supported in Chrome at the moment. The upcoming nganimate polyfill
- * may also add some introspection support.
- */
 describe('Animation Tests', () => {
+  const openCloseHref = getLinkById('open-close');
+  const statusSliderHref = getLinkById('status');
+  const toggleHref = getLinkById('toggle');
+  const enterLeaveHref = getLinkById('enter-leave');
+  const autoHref = getLinkById('auto');
+  const filterHref = getLinkById('heroes');
+  const heroGroupsHref = getLinkById('hero-groups');
 
-  const INACTIVE_COLOR = 'rgba(238, 238, 238, 1)';
-  const ACTIVE_COLOR = 'rgba(207, 216, 220, 1)';
-  const NO_TRANSFORM_MATRIX_REGEX = /matrix\(1,\s*0,\s*0,\s*1,\s*0,\s*0\)/;
-
-  beforeEach(() => {
+  beforeAll(() => {
     browser.get('');
   });
 
-  describe('basic states', () => {
+  describe('Open/Close Component', () => {
 
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-basic'));
+    beforeAll(async () => {
+      await openCloseHref.click();
+      sleepFor();
     });
 
-    it('animates between active and inactive', () => {
-      addInactiveHero();
+    it('should be open', async () => {
+      let text = await openClose.getComponentText();
+      const toggleButton = openClose.getToggleButton();
+      const container = openClose.getComponentContainer();
 
-      let li = host.element(by.css('li'));
+      if (text.includes('Closed')) {
+        await toggleButton.click();
+        sleepFor();
+      }
 
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
+      text = await openClose.getComponentText();
+      const containerHeight = await container.getCssValue('height');
 
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.1);
-      expect(li.getCssValue('backgroundColor')).toBe(ACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
+      expect(text).toContain('The box is now Open!');
+      expect(containerHeight).toBe('200px');
     });
 
-  });
+    it('should be closed', async () => {
+      let text = await openClose.getComponentText();
+      const toggleButton = openClose.getToggleButton();
+      const container = openClose.getComponentContainer();
 
-  describe('styles inline in transitions', () => {
+      if (text.includes('Open')) {
+        await toggleButton.click();
+        sleepFor();
+      }
 
-    let host: ElementFinder;
+      text = await openClose.getComponentText();
+      const containerHeight = await container.getCssValue('height');
 
-    beforeEach(function() {
-      host = element(by.css('app-hero-list-inline-styles'));
+      expect(text).toContain('The box is now Closed!');
+      expect(containerHeight).toBe('100px');
     });
 
-    it('are not kept after animation', () => {
-      addInactiveHero();
+    it('should log animation events', async () => {
+      const toggleButton = openClose.getToggleButton();
+      const loggingCheckbox = openClose.getLoggingCheckbox();
+      await loggingCheckbox.click();
+      await toggleButton.click();
 
-      let li = host.element(by.css('li'));
+      const logs = await browser.manage().logs().get(logging.Type.BROWSER);
 
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-    });
+      const animationMessages = logs.filter(({ message }) => message.indexOf('Animation') !== -1 ? true : false);
 
-  });
-
-  describe('combined transition syntax', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-combined-transitions'));
-    });
-
-    it('animates between active and inactive', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.1);
-      expect(li.getCssValue('backgroundColor')).toBe(ACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-    });
-
-  });
-
-  describe('two-way transition syntax', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-twoway'));
-    });
-
-    it('animates between active and inactive', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.1);
-      expect(li.getCssValue('backgroundColor')).toBe(ACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-    });
-
-  });
-
-  describe('enter & leave', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-enter-leave'));
-    });
-
-    it('adds and removes element', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-
-      removeHero();
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('enter & leave & states', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(function() {
-      host = element(by.css('app-hero-list-enter-leave-states'));
-    });
-
-    it('adds and removes and animates between active and inactive', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.1);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-
-      removeHero();
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('auto style calc', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(function() {
-      host = element(by.css('app-hero-list-auto'));
-    });
-
-    it('adds and removes element', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-      expect(li.getCssValue('height')).toBe('50px');
-
-      removeHero();
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('different timings', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-timings'));
-    });
-
-    it('adds and removes element', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-      expect(li.getCssValue('opacity')).toMatch('1');
-
-      removeHero();
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('multiple keyframes', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-multistep'));
-    });
-
-    it('adds and removes element', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-      expect(li.getCssValue('opacity')).toMatch('1');
-
-      removeHero();
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('parallel groups', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-groups'));
-    });
-
-    it('adds and removes element', () => {
-      addInactiveHero();
-
-      let li = host.element(by.css('li'));
-      expect(li.getCssValue('transform')).toMatch(NO_TRANSFORM_MATRIX_REGEX);
-      expect(li.getCssValue('opacity')).toMatch('1');
-
-      removeHero(700);
-      expect(li.isPresent()).toBe(false);
-    });
-
-  });
-
-  describe('adding active heroes', () => {
-
-    let host: ElementFinder;
-
-    beforeEach(() => {
-      host = element(by.css('app-hero-list-basic'));
-    });
-
-    it('animates between active and inactive', () => {
-      addActiveHero();
-
-      let li = host.element(by.css('li'));
-
-      expect(getScaleX(li)).toBe(1.1);
-      expect(li.getCssValue('backgroundColor')).toBe(ACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.0);
-      expect(li.getCssValue('backgroundColor')).toBe(INACTIVE_COLOR);
-
-      li.click();
-      browser.driver.sleep(300);
-      expect(getScaleX(li)).toBe(1.1);
-      expect(li.getCssValue('backgroundColor')).toBe(ACTIVE_COLOR);
+      expect(animationMessages.length).toBeGreaterThan(0);
     });
   });
 
-  describe('callbacks', () => {
-    it('fires a callback on start and done', () => {
-      addActiveHero();
-      browser.manage().logs().get(logging.Type.BROWSER)
-        .then((logs: logging.Entry[]) => {
-          const animationMessages = logs.filter((log) => {
-            return log.message.indexOf('Animation') !== -1 ? true : false;
-          });
+  describe('Status Slider Component', () => {
+    const activeColor = 'rgba(255, 165, 0, 1)';
+    const inactiveColor = 'rgba(0, 0, 255, 1)';
 
-          expect(animationMessages.length).toBeGreaterThan(0);
-        });
+    beforeAll(async () => {
+      await statusSliderHref.click();
+      sleepFor(2000);
+    });
+
+    it('should be inactive with an orange background', async () => {
+      let text = await statusSlider.getComponentText();
+      const toggleButton = statusSlider.getToggleButton();
+      const container = statusSlider.getComponentContainer();
+
+      if (text === 'Active') {
+        await toggleButton.click();
+        sleepFor(2000);
+      }
+
+      text = await statusSlider.getComponentText();
+      const bgColor = await container.getCssValue('backgroundColor');
+
+      expect(text).toBe('Inactive');
+      expect(bgColor).toBe(inactiveColor);
+    });
+
+    it('should be active with a blue background', async () => {
+      let text = await statusSlider.getComponentText();
+      const toggleButton = statusSlider.getToggleButton();
+      const container = statusSlider.getComponentContainer();
+
+      if (text === 'Inactive') {
+        await toggleButton.click();
+        sleepFor(2000);
+      }
+
+      text = await statusSlider.getComponentText();
+      const bgColor = await container.getCssValue('backgroundColor');
+
+      expect(text).toBe('Active');
+      expect(bgColor).toBe(activeColor);
     });
   });
 
-  function addActiveHero(sleep?: number) {
-    sleep = sleep || 500;
-    element(by.buttonText('Add active hero')).click();
-    browser.driver.sleep(sleep);
-  }
-
-  function addInactiveHero(sleep?: number) {
-    sleep = sleep || 500;
-    element(by.buttonText('Add inactive hero')).click();
-    browser.driver.sleep(sleep);
-  }
-
-  function removeHero(sleep?: number) {
-    sleep = sleep || 500;
-    element(by.buttonText('Remove hero')).click();
-    browser.driver.sleep(sleep);
-  }
-
-  function getScaleX(el: ElementFinder) {
-    return Promise.all([
-      getBoundingClientWidth(el),
-      getOffsetWidth(el)
-    ]).then(function(promiseResolutions) {
-      let clientWidth = promiseResolutions[0];
-      let offsetWidth = promiseResolutions[1];
-      return clientWidth / offsetWidth;
+  describe('Toggle Animations Component', () => {
+    beforeAll(async () => {
+      await toggleHref.click();
+      sleepFor();
     });
-  }
 
-  function getBoundingClientWidth(el: ElementFinder) {
-    return browser.executeScript(
-      'return arguments[0].getBoundingClientRect().width',
-      el.getWebElement()
-    ) as PromiseLike<number>;
-  }
+    it('should disabled animations on the child element', async () => {
+      const toggleButton = toggle.getToggleAnimationsButton();
 
-  function getOffsetWidth(el: ElementFinder) {
-    return browser.executeScript(
-      'return arguments[0].offsetWidth',
-      el.getWebElement()
-    ) as PromiseLike<number>;
-  }
+      await toggleButton.click();
+
+      const container = toggle.getComponentContainer();
+      const cssClasses = await container.getAttribute('class');
+
+      expect(cssClasses).toContain('ng-animate-disabled');
+    });
+  });
+
+  describe('Enter/Leave Component', () => {
+    beforeAll(async () => {
+      await enterLeaveHref.click();
+      sleepFor(100);
+    });
+
+    it('should attach a flyInOut trigger to the list of items', async () => {
+      const heroesList = enterLeave.getHeroesList();
+      const hero = heroesList.get(0);
+      const cssClasses = await hero.getAttribute('class');
+      const transform = await hero.getCssValue('transform');
+
+      expect(cssClasses).toContain('ng-trigger-flyInOut');
+      expect(transform).toBe('matrix(1, 0, 0, 1, 0, 0)');
+    });
+
+    it('should remove the hero from the list when clicked', async () => {
+      const heroesList = enterLeave.getHeroesList();
+      const total = await heroesList.count();
+      const hero = heroesList.get(0);
+
+      await hero.click();
+      await sleepFor(100);
+      const newTotal = await heroesList.count();
+
+      expect(newTotal).toBeLessThan(total);
+    });
+  });
+
+  describe('Auto Calculation Component', () => {
+    beforeAll(async () => {
+      await autoHref.click();
+      sleepFor(0);
+    });
+
+    it('should attach a shrinkOut trigger to the list of items', async () => {
+      const heroesList = auto.getHeroesList();
+      const hero = heroesList.get(0);
+      const cssClasses = await hero.getAttribute('class');
+
+      expect(cssClasses).toContain('ng-trigger-shrinkOut');
+    });
+
+    it('should remove the hero from the list when clicked', async () => {
+      const heroesList = auto.getHeroesList();
+      const total = await heroesList.count();
+      const hero = heroesList.get(0);
+
+      await hero.click();
+      await sleepFor(250);
+      const newTotal = await heroesList.count();
+
+      expect(newTotal).toBeLessThan(total);
+    });
+  });
+
+  describe('Filter/Stagger Component', () => {
+    beforeAll(async () => {
+      await filterHref.click();
+      sleepFor();
+    });
+
+    it('should attach a filterAnimations trigger to the list container', async () => {
+      const heroesList = filterStagger.getComponentContainer();
+      const cssClasses = await heroesList.getAttribute('class');
+
+      expect(cssClasses).toContain('ng-trigger-filterAnimation');
+    });
+
+    it('should filter down the list when a search is performed', async () => {
+      const heroesList = filterStagger.getHeroesList();
+      const total = await heroesList.count();
+      const formInput = filterStagger.getFormInput();
+
+      await formInput.sendKeys('Mag');
+      await sleepFor(500);
+      const newTotal = await heroesList.count();
+
+      expect(newTotal).toBeLessThan(total);
+      expect(newTotal).toBe(2);
+    });
+  });
+
+  describe('Hero Groups Component', () => {
+    beforeAll(async () => {
+      await heroGroupsHref.click();
+      sleepFor(300);
+    });
+
+    it('should attach a flyInOut trigger to the list of items', async () => {
+      const heroesList = heroGroups.getHeroesList();
+      const hero = heroesList.get(0);
+      const cssClasses = await hero.getAttribute('class');
+      const transform = await hero.getCssValue('transform');
+      const opacity = await hero.getCssValue('opacity');
+
+      expect(cssClasses).toContain('ng-trigger-flyInOut');
+      expect(transform).toBe('matrix(1, 0, 0, 1, 0, 0)');
+      expect(opacity).toBe('1');
+    });
+
+    it('should remove the hero from the list when clicked', async () => {
+      const heroesList = heroGroups.getHeroesList();
+      const total = await heroesList.count();
+      const hero = heroesList.get(0);
+
+      await hero.click();
+      await sleepFor(300);
+      const newTotal = await heroesList.count();
+
+      expect(newTotal).toBeLessThan(total);
+    });
+  });
 });
+
+

aio/content/examples/animations/e2e/src/auto.po.ts

@@ -0,0 +1,19 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-hero-list-auto-page');
+}
+
+export function getComponent() {
+  return by.css('app-hero-list-auto');
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('ul');
+  return locate(getComponent(), findContainer());
+}
+
+export function getHeroesList() {
+  return getComponentContainer().all(by.css('li'));
+}

aio/content/examples/animations/e2e/src/enter-leave.po.ts

@@ -0,0 +1,19 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-hero-list-enter-leave-page');
+}
+
+export function getComponent() {
+  return by.css('app-hero-list-enter-leave');
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('ul');
+  return locate(getComponent(), findContainer());
+}
+
+export function getHeroesList() {
+  return getComponentContainer().all(by.css('li'));
+}

aio/content/examples/animations/e2e/src/filter-stagger.po.ts

@@ -0,0 +1,20 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-hero-list-page');
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('ul');
+  return locate(getPage(), findContainer());
+}
+
+export function getHeroesList() {
+  return getComponentContainer().all(by.css('li'));
+}
+
+export function getFormInput() {
+  const formInput = () => by.css('form > input');
+  return locate(getPage(), formInput());
+}

aio/content/examples/animations/e2e/src/hero-groups.ts

@@ -0,0 +1,19 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-hero-list-groups-page');
+}
+
+export function getComponent() {
+  return by.css('app-hero-list-groups');
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('ul');
+  return locate(getComponent(), findContainer());
+}
+
+export function getHeroesList() {
+  return getComponentContainer().all(by.css('li'));
+}

aio/content/examples/animations/e2e/src/open-close.po.ts

@@ -0,0 +1,33 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-open-close-page');
+}
+
+export function getComponent() {
+  return by.css('app-open-close');
+}
+
+export function getToggleButton() {
+  const toggleButton = () => by.buttonText('Toggle Open/Close');
+  return locate(getComponent(), toggleButton());
+}
+
+export function getLoggingCheckbox() {
+  const loggingCheckbox = () => by.css('section > input[type="checkbox"]');
+  return locate(getPage(), loggingCheckbox());
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('div');
+  return locate(getComponent(), findContainer());
+}
+
+export async function getComponentText() {
+  const findContainerText = () => by.css('div');
+  const contents = locate(getComponent(), findContainerText());
+  const componentText = await contents.getText();
+
+  return componentText;
+}

aio/content/examples/animations/e2e/src/status-slider.po.ts

@@ -0,0 +1,28 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-status-slider-page');
+}
+
+export function getComponent() {
+  return by.css('app-status-slider');
+}
+
+export function getToggleButton() {
+  const toggleButton = () => by.buttonText('Toggle Status');
+  return locate(getComponent(), toggleButton());
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('div');
+  return locate(getComponent(), findContainer());
+}
+
+export async function getComponentText() {
+  const findContainerText = () => by.css('div');
+  const contents = locate(getComponent(), findContainerText());
+  const componentText = await contents.getText();
+
+  return componentText;
+}

aio/content/examples/animations/e2e/src/toggle.po.ts

@@ -0,0 +1,25 @@
+import { by } from 'protractor';
+import { locate } from './util';
+
+export function getPage() {
+  return by.css('app-toggle-animations-child-page');
+}
+
+export function getComponent() {
+  return by.css('app-open-close-toggle');
+}
+
+export function getToggleButton() {
+  const toggleButton = () => by.buttonText('Toggle Open/Closed');
+  return locate(getComponent(), toggleButton());
+}
+
+export function getToggleAnimationsButton() {
+  const toggleAnimationsButton = () => by.buttonText('Toggle Animations');
+  return locate(getComponent(), toggleAnimationsButton());
+}
+
+export function getComponentContainer() {
+  const findContainer = () => by.css('div');
+  return locate(getComponent()).all(findContainer()).get(0);
+}

aio/content/examples/animations/e2e/src/util.ts

@@ -0,0 +1,19 @@
+import { Locator, ElementFinder, browser, by, element } from 'protractor';
+
+/**
+ *
+ * locate(finder1, finder2) => element(finder1).element(finder2).element(finderN);
+ */
+export function locate(locator: Locator, ...locators: Locator[]) {
+  return locators.reduce((current: ElementFinder, next: Locator) => {
+    return current.element(next);
+  }, element(locator)) as ElementFinder;
+}
+
+export async function sleepFor(time = 1000) {
+  return await browser.sleep(time);
+}
+
+export function getLinkById(id: string) {
+  return element(by.css(`a[id=${id}]`));
+}

aio/content/examples/animations/src/app/about.component.html

@@ -0,0 +1,3 @@
+<p>
+  Angular's animations library makes it easy to define and apply animation effects such as page and list transitions.
+</p>

aio/content/examples/animations/src/app/about.component.ts

@@ -0,0 +1,15 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-about',
+  templateUrl: './about.component.html',
+  styleUrls: ['./about.component.css']
+})
+export class AboutComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}

aio/content/examples/animations/src/app/animations.1.ts

@@ -0,0 +1,11 @@
+// #docregion
+import { animation, style, animate } from '@angular/animations';
+
+export const transAnimation = animation([
+  style({
+    height: '{{ height }}',
+    opacity: '{{ opacity }}',
+    backgroundColor: '{{ backgroundColor }}'
+  }),
+  animate('{{ time }}')
+]);

aio/content/examples/animations/src/app/animations.ts

@@ -0,0 +1,74 @@
+// #docregion reusable
+import {
+  animation, trigger, animateChild, group,
+  transition, animate, style, query
+} from '@angular/animations';
+
+export const transAnimation = animation([
+  style({
+    height: '{{ height }}',
+    opacity: '{{ opacity }}',
+    backgroundColor: '{{ backgroundColor }}'
+  }),
+  animate('{{ time }}')
+]);
+// #enddocregion reusable
+
+// Routable animations
+// #docregion route-animations
+export const slideInAnimation =
+// #docregion style-view
+  trigger('routeAnimations', [
+    transition('HomePage <=> AboutPage', [
+      style({ position: 'relative' }),
+      query(':enter, :leave', [
+        style({
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          width: '100%'
+        })
+      ]),
+// #enddocregion style-view
+// #docregion query
+      query(':enter', [
+        style({ left: '-100%'})
+      ]),
+      query(':leave', animateChild()),
+      group([
+        query(':leave', [
+          animate('300ms ease-out', style({ left: '100%'}))
+        ]),
+        query(':enter', [
+          animate('300ms ease-out', style({ left: '0%'}))
+        ])
+      ]),
+      query(':enter', animateChild()),
+    ]),
+    transition('* <=> FilterPage', [
+      style({ position: 'relative' }),
+      query(':enter, :leave', [
+        style({
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          width: '100%'
+        })
+      ]),
+      query(':enter', [
+        style({ left: '-100%'})
+      ]),
+      query(':leave', animateChild()),
+      group([
+        query(':leave', [
+          animate('200ms ease-out', style({ left: '100%'}))
+        ]),
+        query(':enter', [
+          animate('300ms ease-out', style({ left: '0%'}))
+        ])
+      ]),
+      query(':enter', animateChild()),
+    ])
+    // #enddocregion query
+  ]);
+  // #enddocregion route-animations

aio/content/examples/animations/src/app/app.component.1.ts

@@ -0,0 +1,35 @@
+// #docplaster
+// #docregion imports
+import { Component, HostBinding } from '@angular/core';
+import {
+  trigger,
+  state,
+  style,
+  animate,
+  transition,
+  // ...
+} from '@angular/animations';
+
+// #enddocregion imports
+
+// #docregion decorator, toggle-app-animations
+@Component({
+  selector: 'app-root',
+  templateUrl: 'app.component.html',
+  styleUrls: ['app.component.css'],
+  animations: [
+    // animation triggers go here
+  ]
+})
+// #enddocregion decorator
+export class AppComponent {
+  @HostBinding('@.disabled')
+  public animationsDisabled = false;
+// #enddocregion toggle-app-animations
+
+  toggleAnimations() {
+    this.animationsDisabled = !this.animationsDisabled;
+  }
+// #docregion toggle-app-animations
+}
+// #enddocregion toggle-app-animations

aio/content/examples/animations/src/app/app.component.css

@@ -0,0 +1,7 @@
+:host {
+  display: block;
+}
+
+section {
+  margin-top: 100px;
+}

aio/content/examples/animations/src/app/app.component.html

@@ -0,0 +1,21 @@
+<h1>Animations</h1>
+
+Toggle All Animations <input type="checkbox" [checked]="!animationsDisabled" (click)="toggleAnimations()"/>
+
+<nav>
+  <a id="home" routerLink="/home" routerLinkActive="active">Home</a>
+  <a id="about" routerLink="/about" routerLinkActive="active">About</a>
+  <a id="open-close" routerLink="/open-close" routerLinkActive="active">Open/Close</a>
+  <a id="status" routerLink="/status" routerLinkActive="active">Status Slider</a>
+  <a id="toggle" routerLink="/toggle" routerLinkActive="active">Toggle Animations</a>
+  <a id="enter-leave" routerLink="/enter-leave" routerLinkActive="active">Enter/Leave</a>
+  <a id="auto" routerLink="/auto" routerLinkActive="active">Auto Calculation</a>
+  <a id="heroes" routerLink="/heroes" routerLinkActive="active">Filter/Stagger</a>
+  <a id="hero-groups" routerLink="/hero-groups" routerLinkActive="active">Hero Groups</a>
+</nav>
+
+<!-- #docregion route-animations-outlet -->
+<div [@routeAnimations]="prepareRoute(outlet)" >
+  <router-outlet #outlet="outlet"></router-outlet>
+</div>
+<!-- #enddocregion route-animations-outlet -->

aio/content/examples/animations/src/app/app.component.ts

@@ -0,0 +1,47 @@
+// #docplaster
+// #docregion imports
+import { Component, HostBinding } from '@angular/core';
+import {
+  trigger,
+  state,
+  style,
+  animate,
+  transition,
+  // ...
+} from '@angular/animations';
+
+// #enddocregion imports
+import { RouterOutlet } from '@angular/router';
+import { slideInAnimation } from './animations';
+
+// #docregion decorator, toggle-app-animations, define
+@Component({
+  selector: 'app-root',
+  templateUrl: 'app.component.html',
+  styleUrls: ['app.component.css'],
+  animations: [
+// #enddocregion decorator
+    slideInAnimation
+// #docregion decorator
+    // animation triggers go here
+  ]
+})
+// #enddocregion decorator, define
+export class AppComponent {
+  @HostBinding('@.disabled')
+  public animationsDisabled = false;
+// #enddocregion toggle-app-animations
+
+// #docregion prepare-router-outlet
+  prepareRoute(outlet: RouterOutlet) {
+    return outlet && outlet.activatedRouteData && outlet.activatedRouteData['animation'];
+  }
+
+// #enddocregion prepare-router-outlet
+
+  toggleAnimations() {
+    this.animationsDisabled = !this.animationsDisabled;
+  }
+// #docregion toggle-app-animations
+}
+// #enddocregion toggle-app-animations

aio/content/examples/animations/src/app/app.module.1.ts

@@ -0,0 +1,13 @@
+import { NgModule } from '@angular/core';
+import { BrowserModule } from '@angular/platform-browser';
+import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
+
+@NgModule({
+  imports: [
+    BrowserModule,
+    BrowserAnimationsModule
+  ],
+  declarations: [ ],
+  bootstrap: [ ]
+})
+export class AppModule { }

aio/content/examples/animations/src/app/app.module.ts

@@ -1,43 +1,63 @@
-// #docplaster
+// #docregion route-animation-data
 import { NgModule } from '@angular/core';
-// #docregion animations-module
 import { BrowserModule } from '@angular/platform-browser';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
-// #enddocregion animations-module
-
-import { HeroTeamBuilderComponent } from './hero-team-builder.component';
-import { HeroListBasicComponent } from './hero-list-basic.component';
-import { HeroListInlineStylesComponent } from './hero-list-inline-styles.component';
-import { HeroListEnterLeaveComponent } from './hero-list-enter-leave.component';
-import { HeroListEnterLeaveStatesComponent } from './hero-list-enter-leave-states.component';
-import { HeroListCombinedTransitionsComponent } from './hero-list-combined-transitions.component';
-import { HeroListTwowayComponent } from './hero-list-twoway.component';
-import { HeroListAutoComponent } from './hero-list-auto.component';
+import { RouterModule } from '@angular/router';
+import { AppComponent } from './app.component';
+import { OpenCloseComponent } from './open-close.component';
+import { OpenClosePageComponent } from './open-close-page.component';
+import { OpenCloseChildComponent } from './open-close.component.4';
+import { ToggleAnimationsPageComponent } from './toggle-animations-page.component';
+import { StatusSliderComponent } from './status-slider.component';
+import { StatusSliderPageComponent } from './status-slider-page.component';
+import { HeroListPageComponent } from './hero-list-page.component';
+import { HeroListGroupPageComponent } from './hero-list-group-page.component';
 import { HeroListGroupsComponent } from './hero-list-groups.component';
-import { HeroListMultistepComponent } from './hero-list-multistep.component';
-import { HeroListTimingsComponent } from './hero-list-timings.component';
-// #docregion animations-module
+import { HeroListEnterLeavePageComponent } from './hero-list-enter-leave-page.component';
+import { HeroListEnterLeaveComponent } from './hero-list-enter-leave.component';
+import { HeroListAutoCalcPageComponent } from './hero-list-auto-page.component';
+import { HeroListAutoComponent } from './hero-list-auto.component';
+import { HomeComponent } from './home.component';
+import { AboutComponent } from './about.component';
+
 
 @NgModule({
-  imports: [ BrowserModule, BrowserAnimationsModule ],
-  // ... more stuff ...
-// #enddocregion animations-module
-  declarations: [
-    HeroTeamBuilderComponent,
-    HeroListBasicComponent,
-    HeroListInlineStylesComponent,
-    HeroListCombinedTransitionsComponent,
-    HeroListTwowayComponent,
-    HeroListEnterLeaveComponent,
-    HeroListEnterLeaveStatesComponent,
-    HeroListAutoComponent,
-    HeroListTimingsComponent,
-    HeroListMultistepComponent,
-    HeroListGroupsComponent
+  imports: [
+    BrowserModule,
+    BrowserAnimationsModule,
+    RouterModule.forRoot([
+      { path: '', pathMatch: 'full', redirectTo: '/enter-leave' },
+      { path: 'open-close', component: OpenClosePageComponent },
+      { path: 'status', component: StatusSliderPageComponent },
+      { path: 'toggle', component: ToggleAnimationsPageComponent },
+      { path: 'heroes', component: HeroListPageComponent, data: {animation: 'FilterPage'} },
+      { path: 'hero-groups', component: HeroListGroupPageComponent },
+      { path: 'enter-leave', component: HeroListEnterLeavePageComponent },
+      { path: 'auto', component: HeroListAutoCalcPageComponent },
+      { path: 'home', component: HomeComponent, data: {animation: 'HomePage'} },
+      { path: 'about', component: AboutComponent, data: {animation: 'AboutPage'} },
+
+    ])
   ],
-  bootstrap: [ HeroTeamBuilderComponent ]
-// #docregion animations-module
+  // #enddocregion route-animation-data
+  declarations: [
+    AppComponent,
+    StatusSliderComponent,
+    OpenCloseComponent,
+    OpenCloseChildComponent,
+    OpenClosePageComponent,
+    StatusSliderPageComponent,
+    ToggleAnimationsPageComponent,
+    HeroListPageComponent,
+    HeroListGroupsComponent,
+    HeroListGroupPageComponent,
+    HeroListEnterLeavePageComponent,
+    HeroListEnterLeaveComponent,
+    HeroListAutoCalcPageComponent,
+    HeroListAutoComponent,
+    HomeComponent,
+    AboutComponent
+  ],
+  bootstrap: [AppComponent]
 })
 export class AppModule { }
-// #enddocregion animations-module
-

aio/content/examples/animations/src/app/hero-list-auto-page.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+import { HEROES } from './mock-heroes';
+
+@Component({
+  selector: 'app-hero-list-auto-page',
+  template: `
+    <section>
+      <h2>Automatic Calculation</h2>
+
+      <app-hero-list-auto [heroes]="heroes" (remove)="onRemove($event)"></app-hero-list-auto>
+    </section>
+  `
+})
+export class HeroListAutoCalcPageComponent {
+  heroes = HEROES.slice();
+
+  onRemove(id: number) {
+    this.heroes = this.heroes.filter(hero => hero.id !== id);
+  }
+}

aio/content/examples/animations/src/app/hero-list-auto.component.html

@@ -0,0 +1,9 @@
+<ul class="heroes">
+  <li *ngFor="let hero of heroes"
+      [@shrinkOut]="'in'" (click)="removeHero(hero.id)">
+      <div class="inner">
+        <span class="badge">{{ hero.id }}</span>
+        <span>{{ hero.name }}</span>
+      </div>
+  </li>
+</ul>

aio/content/examples/animations/src/app/hero-list-auto.component.ts

@@ -1,6 +1,8 @@
 import {
   Component,
-  Input
+  Input,
+  Output,
+  EventEmitter
 } from '@angular/core';
 import {
   trigger,
@@ -10,38 +12,30 @@ import {
   transition
 } from '@angular/animations';
 
-import { Hero } from './hero.service';
+import { Hero } from './hero';
 
 @Component({
   selector: 'app-hero-list-auto',
-  // #docregion template
-  template: `
-    <ul>
-      <li *ngFor="let hero of heroes"
-          [@shrinkOut]="'in'">
-        {{hero.name}}
-      </li>
-    </ul>
-  `,
-  // #enddocregion template
-  styleUrls: ['./hero-list.component.css'],
-
-  /* When the element leaves (transition "in => void" occurs),
-   * get the element's current computed height and animate
-   * it down to 0.
-   */
-  // #docregion animationdef
+  templateUrl: 'hero-list-auto.component.html',
+  styleUrls: ['./hero-list-page.component.css'],
+  // #docregion auto-calc
   animations: [
     trigger('shrinkOut', [
-      state('in', style({height: '*'})),
+      state('in', style({ height: '*' })),
       transition('* => void', [
-        style({height: '*'}),
-        animate(250, style({height: 0}))
+        style({ height: '*' }),
+        animate(250, style({ height: 0 }))
       ])
     ])
   ]
-  // #enddocregion animationdef
+  // #enddocregion auto-calc
 })
 export class HeroListAutoComponent {
    @Input() heroes: Hero[];
+
+   @Output() remove = new EventEmitter<number>();
+
+   removeHero(id: number) {
+     this.remove.emit(id);
+   }
 }

aio/content/examples/animations/src/app/hero-list-basic.component.ts

@@ -1,70 +0,0 @@
-// #docplaster
-// #docregion
-// #docregion imports
-import {
-  Component,
-  Input
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-// #enddocregion imports
-
-import { Hero } from './hero.service';
-
-@Component({
-  selector: 'app-hero-list-basic',
-  // #enddocregion
-  /* The click event calls hero.toggleState(), which
-   * causes the state of that hero to switch from
-   * active to inactive or vice versa.
-   */
-  // #docregion
-  // #docregion template
-  template: `
-    <ul>
-      <li *ngFor="let hero of heroes"
-          [@heroState]="hero.state"
-          (click)="hero.toggleState()">
-        {{hero.name}}
-      </li>
-    </ul>
-  `,
-  // #enddocregion template
-  styleUrls: ['./hero-list.component.css'],
-  // #enddocregion
-  /**
-   * Define two states, "inactive" and "active", and the end
-   * styles that apply whenever the element is in those states.
-   * Then define animations for transitioning between the states,
-   * one in each direction
-   */
-  // #docregion
-  // #docregion animationdef
-  animations: [
-    trigger('heroState', [
-      // #docregion states
-      state('inactive', style({
-        backgroundColor: '#eee',
-        transform: 'scale(1)'
-      })),
-      state('active',   style({
-        backgroundColor: '#cfd8dc',
-        transform: 'scale(1.1)'
-      })),
-      // #enddocregion states
-      // #docregion transitions
-      transition('inactive => active', animate('100ms ease-in')),
-      transition('active => inactive', animate('100ms ease-out'))
-      // #enddocregion transitions
-    ])
-  ]
-  // #enddocregion animationdef
-})
-export class HeroListBasicComponent {
-   @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-list-combined-transitions.component.ts

@@ -1,59 +0,0 @@
-// #docregion
-// #docregion imports
-import {
-  Component,
-  Input
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-// #enddocregion imports
-
-import { Hero } from './hero.service';
-
-@Component({
- selector: 'app-hero-list-combined-transitions',
- // #docregion template
- template: `
-   <ul>
-     <li *ngFor="let hero of heroes"
-         [@heroState]="hero.state"
-         (click)="hero.toggleState()">
-       {{hero.name}}
-     </li>
-   </ul>
- `,
- // #enddocregion template
- styleUrls: ['./hero-list.component.css'],
- /*
-  * Define two states, "inactive" and "active", and the end
-  * styles that apply whenever the element is in those states.
-  * Then define an animated transition between these two
-  * states, in *both* directions.
-  */
- // #docregion animationdef
- animations: [
-   trigger('heroState', [
-     state('inactive', style({
-       backgroundColor: '#eee',
-       transform: 'scale(1)'
-     })),
-     state('active',   style({
-       backgroundColor: '#cfd8dc',
-       transform: 'scale(1.1)'
-     })),
-     // #docregion transitions
-     transition('inactive => active, active => inactive',
-      animate('100ms ease-out'))
-     // #enddocregion transitions
-   ])
- ]
- // #enddocregion animationdef
-})
-export class HeroListCombinedTransitionsComponent {
-  @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-list-enter-leave-page.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+import { HEROES } from './mock-heroes';
+
+@Component({
+  selector: 'app-hero-list-enter-leave-page',
+  template: `
+    <section>
+      <h2>Enter/Leave</h2>
+
+      <app-hero-list-enter-leave [heroes]="heroes" (remove)="onRemove($event)"></app-hero-list-enter-leave>
+    </section>
+  `
+})
+export class HeroListEnterLeavePageComponent {
+  heroes = HEROES.slice();
+
+  onRemove(id: number) {
+    this.heroes = this.heroes.filter(hero => hero.id !== id);
+  }
+}

aio/content/examples/animations/src/app/hero-list-enter-leave-states.component.ts

@@ -1,63 +0,0 @@
-import {
-  Component,
-  Input
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-
-import { Hero } from './hero.service';
-
-@Component({
-  selector: 'app-hero-list-enter-leave-states',
-  // #docregion template
-  template: `
-    <ul>
-      <li *ngFor="let hero of heroes"
-          (click)="hero.toggleState()"
-          [@heroState]="hero.state">
-        {{hero.name}}
-      </li>
-    </ul>
-  `,
-  // #enddocregion template
-  styleUrls: ['./hero-list.component.css'],
-  /* The elements here have two possible states based
-   * on the hero state, "active", or "inactive". We animate
-   * six transitions: Between the two states in both directions,
-   * and between each state and void. With this we can animate
-   * the enter and leave of elements differently based on which
-   * state they are in when they are added and removed.
-   */
-  // #docregion animationdef
-  animations: [
-    trigger('heroState', [
-      state('inactive', style({transform: 'translateX(0) scale(1)'})),
-      state('active',   style({transform: 'translateX(0) scale(1.1)'})),
-      transition('inactive => active', animate('100ms ease-in')),
-      transition('active => inactive', animate('100ms ease-out')),
-      transition('void => inactive', [
-        style({transform: 'translateX(-100%) scale(1)'}),
-        animate(100)
-      ]),
-      transition('inactive => void', [
-        animate(100, style({transform: 'translateX(100%) scale(1)'}))
-      ]),
-      transition('void => active', [
-        style({transform: 'translateX(0) scale(0)'}),
-        animate(200)
-      ]),
-      transition('active => void', [
-        animate(200, style({transform: 'translateX(0) scale(0)'}))
-      ])
-    ])
-  ]
-  // #enddocregion animationdef
-})
-export class HeroListEnterLeaveStatesComponent {
-   @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-list-enter-leave.component.ts

@@ -1,6 +1,8 @@
 import {
   Component,
-  Input
+  Input,
+  Output,
+  EventEmitter
 } from '@angular/core';
 import {
   trigger,
@@ -10,42 +12,45 @@ import {
   transition
 } from '@angular/animations';
 
-import { Hero } from './hero.service';
+import { Hero } from './hero';
 
 @Component({
   selector: 'app-hero-list-enter-leave',
   // #docregion template
   template: `
-    <ul>
+    <ul class="heroes">
       <li *ngFor="let hero of heroes"
-          [@flyInOut]="'in'">
-        {{hero.name}}
+          [@flyInOut]="'in'" (click)="removeHero(hero.id)">
+          <div class="inner">
+            <span class="badge">{{ hero.id }}</span>
+            <span>{{ hero.name }}</span>
+          </div>
       </li>
     </ul>
   `,
   // #enddocregion template
-  styleUrls: ['./hero-list.component.css'],
-  /* The element here always has the state "in" when it
-   * is present. We animate two transitions: From void
-   * to in and from in to void, to achieve an animated
-   * enter and leave transition. The element enters from
-   * the left and leaves to the right using translateX.
-   */
+  styleUrls: ['./hero-list-page.component.css'],
   // #docregion animationdef
   animations: [
     trigger('flyInOut', [
-      state('in', style({transform: 'translateX(0)'})),
+      state('in', style({ transform: 'translateX(0)' })),
       transition('void => *', [
-        style({transform: 'translateX(-100%)'}),
+        style({ transform: 'translateX(-100%)' }),
         animate(100)
       ]),
       transition('* => void', [
-        animate(100, style({transform: 'translateX(100%)'}))
+        animate(100, style({ transform: 'translateX(100%)' }))
       ])
     ])
   ]
   // #enddocregion animationdef
 })
 export class HeroListEnterLeaveComponent {
-   @Input() heroes: Hero[];
+  @Input() heroes: Hero[];
+
+  @Output() remove = new EventEmitter<number>();
+
+  removeHero(id: number) {
+    this.remove.emit(id);
+  }
 }

aio/content/examples/animations/src/app/hero-list-group-page.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+import { HEROES } from './mock-heroes';
+
+@Component({
+  selector: 'app-hero-list-groups-page',
+  template: `
+    <section>
+      <h2>Hero List Group</h2>
+
+      <app-hero-list-groups [heroes]="heroes" (remove)="onRemove($event)"></app-hero-list-groups>
+    </section>
+  `
+})
+export class HeroListGroupPageComponent {
+  heroes = HEROES.slice();
+
+  onRemove(id: number) {
+    this.heroes = this.heroes.filter(hero => hero.id !== id);
+  }
+}

aio/content/examples/animations/src/app/hero-list-groups.component.ts

@@ -1,6 +1,8 @@
 import {
   Component,
-  Input
+  Input,
+  Output,
+  EventEmitter
 } from '@angular/core';
 import {
   trigger,
@@ -11,45 +13,31 @@ import {
   group
 } from '@angular/animations';
 
-import { Hero } from './hero.service';
+import { Hero } from './hero';
 
 @Component({
   selector: 'app-hero-list-groups',
   template: `
-    <ul>
+    <ul class="heroes">
       <li *ngFor="let hero of heroes"
-          [@flyInOut]="'in'">
-        {{hero.name}}
+          [@flyInOut]="'in'" (click)="removeHero(hero.id)">
+          <div class="inner">
+            <span class="badge">{{ hero.id }}</span>
+            <span>{{ hero.name }}</span>
+          </div>
       </li>
     </ul>
   `,
-  styleUrls: ['./hero-list.component.css'],
-  styles: [`
-    li {
-      padding: 0 !important;
-      text-align: center;
-    }
-  `],
-  /* The element here always has the state "in" when it
-   * is present. We animate two transitions: From void
-   * to in and from in to void, to achieve an animated
-   * enter and leave transition.
-   *
-   * The transitions have  *parallel group* that allow
-   * animating several properties at the same time but
-   * with different timing configurations. On enter
-   * (void => *) we start the opacity animation 0.1s
-   * earlier than the translation/width animation.
-   * On leave (* => void) we do the opposite -
-   * the translation/width animation begins immediately
-   * and the opacity animation 0.1s later.
-   */
+  styleUrls: ['./hero-list-page.component.css'],
   // #docregion animationdef
   animations: [
     trigger('flyInOut', [
-      state('in', style({width: 120, transform: 'translateX(0)', opacity: 1})),
+      state('in', style({
+        width: 120,
+        transform: 'translateX(0)', opacity: 1
+      })),
       transition('void => *', [
-        style({width: 10, transform: 'translateX(50px)', opacity: 0}),
+        style({ width: 10, transform: 'translateX(50px)', opacity: 0 }),
         group([
           animate('0.3s 0.1s ease', style({
             transform: 'translateX(0)',
@@ -77,4 +65,10 @@ import { Hero } from './hero.service';
 })
 export class HeroListGroupsComponent {
    @Input() heroes: Hero[];
+
+   @Output() remove = new EventEmitter<number>();
+
+   removeHero(id: number) {
+     this.remove.emit(id);
+   }
 }

aio/content/examples/animations/src/app/hero-list-inline-styles.component.ts

@@ -1,60 +0,0 @@
-// #docregion
-// #docregion imports
-import {
-  Component,
-  Input,
-} from '@angular/core';
-import {
-  trigger,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-// #enddocregion imports
-
-import { Hero } from './hero.service';
-
-@Component({
- selector: 'app-hero-list-inline-styles',
- // #docregion template
- template: `
-   <ul>
-     <li *ngFor="let hero of heroes"
-         [@heroState]="hero.state"
-         (click)="hero.toggleState()">
-       {{hero.name}}
-     </li>
-   </ul>
- `,
- // #enddocregion template
- styleUrls: ['./hero-list.component.css'],
- /**
-  * Define two states, "inactive" and "active", and the end
-  * styles that apply whenever the element is in those states.
-  * Then define an animation for the inactive => active transition.
-  * This animation has no end styles, but only styles that are
-  * defined inline inside the transition and thus are only kept
-  * as long as the animation is running.
-  */
- // #docregion animationdef
- animations: [
-   trigger('heroState', [
-     // #docregion transitions
-     transition('inactive => active', [
-       style({
-         backgroundColor: '#cfd8dc',
-         transform: 'scale(1.3)'
-       }),
-       animate('80ms ease-in', style({
-         backgroundColor: '#eee',
-         transform: 'scale(1)'
-       }))
-     ]),
-     // #enddocregion transitions
-   ])
- ]
- // #enddocregion animationdef
-})
-export class HeroListInlineStylesComponent {
-  @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-list-multistep.component.ts

@@ -1,71 +0,0 @@
-import {
-  Component,
-  Input,
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition,
-  keyframes,
-  AnimationEvent
-} from '@angular/animations';
-
-import { Hero } from './hero.service';
-
-@Component({
-  selector: 'app-hero-list-multistep',
-  // #docregion template
-  template: `
-    <ul>
-      <li *ngFor="let hero of heroes"
-          (@flyInOut.start)="animationStarted($event)"
-          (@flyInOut.done)="animationDone($event)"
-          [@flyInOut]="'in'">
-        {{hero.name}}
-      </li>
-    </ul>
-  `,
-  // #enddocregion template
-  styleUrls: ['./hero-list.component.css'],
-  /* The element here always has the state "in" when it
-   * is present. We animate two transitions: From void
-   * to in and from in to void, to achieve an animated
-   * enter and leave transition. Each transition is
-   * defined in terms of multiple keyframes, to give it
-   * a bounce effect.
-   */
-  // #docregion animationdef
-  animations: [
-    trigger('flyInOut', [
-      state('in', style({transform: 'translateX(0)'})),
-      transition('void => *', [
-        animate(300, keyframes([
-          style({opacity: 0, transform: 'translateX(-100%)', offset: 0}),
-          style({opacity: 1, transform: 'translateX(15px)',  offset: 0.3}),
-          style({opacity: 1, transform: 'translateX(0)',     offset: 1.0})
-        ]))
-      ]),
-      transition('* => void', [
-        animate(300, keyframes([
-          style({opacity: 1, transform: 'translateX(0)',     offset: 0}),
-          style({opacity: 1, transform: 'translateX(-15px)', offset: 0.7}),
-          style({opacity: 0, transform: 'translateX(100%)',  offset: 1.0})
-        ]))
-      ])
-    ])
-  ]
-  // #enddocregion animationdef
-})
-export class HeroListMultistepComponent {
-   @Input() heroes: Hero[];
-
-  animationStarted(event: AnimationEvent) {
-    console.warn('Animation started: ', event);
-  }
-
-  animationDone(event: AnimationEvent) {
-    console.warn('Animation done: ', event);
-  }
-}

aio/content/examples/animations/src/app/hero-list-page.component.css

@@ -0,0 +1,94 @@
+.heroes {
+  margin: 0 0 2em 0;
+  list-style-type: none;
+  padding: 0;
+  width: 15em;
+}
+
+.heroes li {
+  position: relative;
+  height: 2.3em;
+  overflow:hidden;
+  margin: .5em;
+}
+
+.heroes li > .inner {
+  cursor: pointer;
+  background-color: #EEE;
+  padding: .3em 0;
+  height: 1.6em;
+  border-radius: 4px;
+  width: 19em;
+}
+
+.heroes li:hover > .inner {
+  color: #607D8B;
+  background-color: #DDD;
+  transform: translateX(.1em);
+}
+
+.heroes a {
+  color: #888;
+  text-decoration: none;
+  position: relative;
+  display: block;
+  width: 250px;
+}
+
+.heroes a:hover {
+  color:#607D8B;
+}
+
+.heroes .badge {
+  display: inline-block;
+  font-size: small;
+  color: white;
+  padding: 0.8em 0.7em 0 0.7em;
+  background-color: #607D8B;
+  line-height: 1em;
+  position: relative;
+  left: -1px;
+  top: -4px;
+  height: 1.8em;
+  min-width: 16px;
+  text-align: right;
+  margin-right: .8em;
+  border-radius: 4px 0 0 4px;
+}
+
+.button {
+  background-color: #eee;
+  border: none;
+  padding: 5px 10px;
+  border-radius: 4px;
+  cursor: pointer;
+  cursor: hand;
+  font-family: Arial;
+}
+
+button:hover {
+  background-color: #cfd8dc;
+}
+
+button.delete {
+  position: relative;
+  left: 24em;
+  top: -32px;
+  background-color: gray !important;
+  color: white;
+  display: inherit;
+  padding: 5px 8px;
+  width: 2em;
+}
+
+input {
+  font-size: 100%;
+  margin-bottom: 2px;
+  width: 11em;
+}
+
+.heroes input {
+  position: relative;
+  top: -3px;
+  width: 12em;
+}

aio/content/examples/animations/src/app/hero-list-page.component.html

@@ -0,0 +1,19 @@
+<!-- #docplaster -->
+<h2>Filter/Stagger</h2>
+
+<form>
+  <input #criteria (input)="updateCriteria(criteria.value)" placeholder="Search Heroes" />
+</form>    
+
+<!-- #docregion filter-animations -->
+<ul class="heroes" [@filterAnimation]="heroTotal">
+<!-- #enddocregion filter-animations -->  
+  <li *ngFor="let hero of heroes" class="hero">
+    <div class="inner">
+      <span class="badge">{{ hero.id }}</span>
+      <span>{{ hero.name }}</span>
+    </div>
+  </li>
+<!-- #docregion filter-animations -->  
+</ul>
+<!-- #enddocregion filter-animations -->

aio/content/examples/animations/src/app/hero-list-page.component.ts

@@ -0,0 +1,81 @@
+// #docplaster
+import { Component, HostBinding, OnInit } from '@angular/core';
+import { trigger, transition, animate, style, query, stagger } from '@angular/animations';
+import { HEROES } from './mock-heroes';
+
+// #docregion filter-animations
+@Component({
+// #enddocregion filter-animations
+  selector: 'app-hero-list-page',
+  templateUrl: 'hero-list-page.component.html',
+  styleUrls: ['hero-list-page.component.css'],
+// #docregion page-animations, filter-animations
+  animations: [
+// #enddocregion filter-animations
+    trigger('pageAnimations', [
+      transition(':enter', [
+        query('.hero, form', [
+          style({opacity: 0, transform: 'translateY(-100px)'}),
+          stagger(-30, [
+            animate('500ms cubic-bezier(0.35, 0, 0.25, 1)', style({ opacity: 1, transform: 'none' }))
+          ])
+        ])
+      ])
+    ]),
+// #enddocregion page-animations
+// #docregion increment
+// #docregion filter-animations
+    trigger('filterAnimation', [
+      transition(':enter, * => 0, * => -1', []),
+      transition(':increment', [
+        query(':enter', [
+          style({ opacity: 0, width: '0px' }),
+          stagger(50, [
+            animate('300ms ease-out', style({ opacity: 1, width: '*' })),
+          ]),
+        ], { optional: true })
+      ]),
+      transition(':decrement', [
+        query(':leave', [
+          stagger(50, [
+            animate('300ms ease-out', style({ opacity: 0, width: '0px' })),
+          ]),
+        ])
+      ]),
+    ]),
+ // #enddocregion  increment
+// #docregion page-animations
+  ]
+})
+export class HeroListPageComponent implements OnInit {
+// #enddocregion filter-animations
+  @HostBinding('@pageAnimations')
+  public animatePage = true;
+
+  _heroes = [];
+// #docregion filter-animations
+  heroTotal = -1;
+// #enddocregion filter-animations
+  get heroes() {
+    return this._heroes;
+  }
+
+  ngOnInit() {
+    this._heroes = HEROES;
+  }
+
+  updateCriteria(criteria: string) {
+    criteria = criteria ? criteria.trim() : '';
+
+    this._heroes = HEROES.filter(hero => hero.name.toLowerCase().includes(criteria.toLowerCase()));
+    const newTotal = this.heroes.length;
+
+    if (this.heroTotal !== newTotal) {
+      this.heroTotal = newTotal;
+    } else if (!criteria) {
+      this.heroTotal = -1;
+    }
+  }
+// #docregion filter-animations
+}
+// #enddocregion filter-animations

aio/content/examples/animations/src/app/hero-list-timings.component.ts

@@ -1,58 +0,0 @@
-import {
-  Component,
-  Input
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-
-import { Hero } from './hero.service';
-
-@Component({
-  selector: 'app-hero-list-timings',
-  template: `
-    <ul>
-      <li *ngFor="let hero of heroes"
-          [@flyInOut]="'in'"
-          (click)="hero.toggleState()">
-         {{hero.name}}
-      </li>
-    </ul>
-  `,
-  styleUrls: ['./hero-list.component.css'],
-  /* The element here always has the state "in" when it
-   * is present. We animate two transitions: From void
-   * to in and from in to void, to achieve an animated
-   * enter and leave transition. The element enters from
-   * the left and leaves to the right using translateX,
-   * and fades in/out using opacity. We use different easings
-   * for enter and leave.
-   */
-  // #docregion animationdef
-  animations: [
-    trigger('flyInOut', [
-      state('in', style({opacity: 1, transform: 'translateX(0)'})),
-      transition('void => *', [
-        style({
-          opacity: 0,
-          transform: 'translateX(-100%)'
-        }),
-        animate('0.2s ease-in')
-      ]),
-      transition('* => void', [
-        animate('0.2s 0.1s ease-out', style({
-          opacity: 0,
-          transform: 'translateX(100%)'
-        }))
-      ])
-    ])
-  ]
-  // #enddocregion animationdef
-})
-export class HeroListTimingsComponent {
-   @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-list-twoway.component.ts

@@ -1,58 +0,0 @@
-// #docregion
-// #docregion imports
-import {
-  Component,
-  Input
-} from '@angular/core';
-import {
-  trigger,
-  state,
-  style,
-  animate,
-  transition
-} from '@angular/animations';
-// #enddocregion imports
-
-import { Hero } from './hero.service';
-
-@Component({
- selector: 'app-hero-list-twoway',
- // #docregion template
- template: `
-   <ul>
-     <li *ngFor="let hero of heroes"
-         [@heroState]="hero.state"
-         (click)="hero.toggleState()">
-       {{hero.name}}
-     </li>
-   </ul>
- `,
- // #enddocregion template
- styleUrls: ['./hero-list.component.css'],
- /*
-  * Define two states, "inactive" and "active", and the end
-  * styles that apply whenever the element is in those states.
-  * Then define an animated transition between these two
-  * states, in *both* directions.
-  */
- // #docregion animationdef
- animations: [
-   trigger('heroState', [
-     state('inactive', style({
-       backgroundColor: '#eee',
-       transform: 'scale(1)'
-     })),
-     state('active',   style({
-       backgroundColor: '#cfd8dc',
-       transform: 'scale(1.1)'
-     })),
-     // #docregion transitions
-     transition('inactive <=> active', animate('100ms ease-out'))
-     // #enddocregion transitions
-   ])
- ]
- // #enddocregion animationdef
-})
-export class HeroListTwowayComponent {
-  @Input() heroes: Hero[];
-}

aio/content/examples/animations/src/app/hero-team-builder.component.ts

@@ -1,99 +0,0 @@
-import { Component } from '@angular/core';
-
-import { Hero, HeroService } from './hero.service';
-
-@Component({
-  selector: 'app-root',
-  template: `
-    <div class="buttons">
-      <button [disabled]="!heroService.canAdd()" (click)="heroService.addInactive()">Add inactive hero</button>
-      <button [disabled]="!heroService.canAdd()" (click)="heroService.addActive()">Add active hero</button>
-      <button [disabled]="!heroService.canRemove()" (click)="heroService.remove()">Remove hero</button>
-    </div>
-
-    <div class="columns">
-      <div class="column">
-        <h4>Basic State</h4>
-        <p>Switch between active/inactive on click.</p>
-        <app-hero-list-basic [heroes]="heroes"></app-hero-list-basic>
-      </div>
-      <div class="column">
-        <h4>Styles inline in transitions</h4>
-        <p>Animated effect on click, no persistend end styles.</p>
-        <app-hero-list-inline-styles [heroes]="heroes"></app-hero-list-inline-styles>
-      </div>
-      <div class="column">
-        <h4>Combined transition syntax</h4>
-        <p>Switch between active/inactive on click. Define just one transition used in both directions.</p>
-        <app-hero-list-combined-transitions [heroes]="heroes"></app-hero-list-combined-transitions>
-      </div>
-      <div class="column">
-        <h4>Two-way transition syntax</h4>
-        <p>Switch between active/inactive on click. Define just one transition used in both directions using the <=> syntax.</p>
-        <app-hero-list-twoway [heroes]="heroes"></app-hero-list-twoway>
-      </div>
-      <div class="column">
-        <h4>Enter & Leave</h4>
-        <p>Enter and leave animations using the void state.</p>
-        <app-hero-list-enter-leave [heroes]="heroes"></app-hero-list-enter-leave>
-      </div>
-    </div>
-    <div class="columns">
-      <div class="column">
-        <h4>Enter & Leave & States</h4>
-        <p>
-          Enter and leave animations combined with active/inactive state animations.
-          Different enter and leave transitions depending on state.
-        </p>
-        <app-hero-list-enter-leave-states [heroes]="heroes"></app-hero-list-enter-leave-states>
-      </div>
-      <div class="column">
-        <h4>Auto Style Calc</h4>
-        <p>Leave animation from the current computed height using the auto-style value *.</p>
-        <app-hero-list-auto [heroes]="heroes"></app-hero-list-auto>
-      </div>
-      <div class="column">
-        <h4>Different Timings</h4>
-        <p>Enter and leave animations with different easings, ease-in for enter, ease-out for leave.</p>
-        <app-hero-list-timings [heroes]="heroes"></app-hero-list-timings>
-      </div>
-      <div class="column">
-        <h4>Multiple Keyframes</h4>
-        <p>Enter and leave animations with three keyframes in each, to give the transition some bounce.</p>
-        <app-hero-list-multistep [heroes]="heroes"></app-hero-list-multistep>
-      </div>
-      <div class="column">
-        <h4>Parallel Groups</h4>
-        <p>Enter and leave animations with multiple properties animated in parallel with different timings.</p>
-        <app-hero-list-groups [heroes]="heroes"></app-hero-list-groups>
-      </div>
-    </div>
-  `,
-  styles: [`
-    .buttons {
-      text-align: center;
-    }
-    button {
-      padding: 1.5em 3em;
-    }
-    .columns {
-      display: flex;
-      flex-direction: row;
-    }
-    .column {
-      flex: 1;
-      padding: 10px;
-    }
-    .column p {
-      min-height: 6em;
-    }
-  `],
-  providers: [HeroService]
-})
-export class HeroTeamBuilderComponent {
-  heroes: Hero[];
-
-  constructor(private heroService: HeroService) {
-    this.heroes = heroService.heroes;
-  }
-}

aio/content/examples/animations/src/app/hero.service.ts

@@ -1,54 +0,0 @@
-import { Injectable } from '@angular/core';
-
-// #docregion hero
-export class Hero {
-  constructor(public name: string, public state = 'inactive') { }
-
-  toggleState() {
-    this.state = this.state === 'active' ? 'inactive' : 'active';
-  }
-}
-// #enddocregion hero
-
-const ALL_HEROES = [
-  'Windstorm',
-  'RubberMan',
-  'Bombasto',
-  'Magneta',
-  'Dynama',
-  'Narco',
-  'Celeritas',
-  'Dr IQ',
-  'Magma',
-  'Tornado',
-  'Mr. Nice'
-].map(name => new Hero(name));
-
-@Injectable()
-export class HeroService {
-
-  heroes: Hero[] = [];
-
-  canAdd() {
-    return this.heroes.length < ALL_HEROES.length;
-  }
-
-  canRemove() {
-    return this.heroes.length > 0;
-  }
-
-  addActive(active = true) {
-    let hero = ALL_HEROES[this.heroes.length];
-    hero.state = active ? 'active' : 'inactive';
-    this.heroes.push(hero);
-  }
-
-  addInactive() {
-    this.addActive(false);
-  }
-
-  remove() {
-    this.heroes.length -= 1;
-  }
-
-}

aio/content/examples/animations/src/app/hero.ts

@@ -0,0 +1,4 @@
+export class Hero {
+  id: number;
+  name: string;
+}

aio/content/examples/animations/src/app/home.component.html

@@ -0,0 +1,3 @@
+<p>
+  Welcome to Animations in Angular!
+</p>

aio/content/examples/animations/src/app/home.component.ts

@@ -0,0 +1,15 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-home',
+  templateUrl: './home.component.html',
+  styleUrls: ['./home.component.css']
+})
+export class HomeComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}

aio/content/examples/animations/src/app/insert-remove.component.css

@@ -0,0 +1,12 @@
+:host {
+  display: block;
+}
+
+.insert-remove-container {
+  border: 1px solid #dddddd;
+  margin-top: 1em;
+  padding: 20px 20px 0px 20px;
+  color: #000000;
+  font-weight: bold;
+  font-size: 20px;
+}

aio/content/examples/animations/src/app/insert-remove.component.html

@@ -0,0 +1,10 @@
+<!-- #docplaster -->
+<nav>
+  <button (click)="toggle()">Toggle Insert/Remove</button>
+</nav>
+
+<!-- #docregion insert-remove-->
+<div @myInsertRemoveTrigger *ngIf="isShown" class="insert-remove-container">
+  <p>The box is inserted</p>
+</div>
+<!-- #enddocregion insert-remove-->

aio/content/examples/animations/src/app/insert-remove.component.ts

@@ -0,0 +1,29 @@
+// #docplaster
+import { Component } from '@angular/core';
+import { trigger, transition, animate, style } from '@angular/animations';
+
+@Component({
+  selector: 'app-insert-remove',
+  animations: [
+// #docregion enter-leave-trigger
+    trigger('myInsertRemoveTrigger', [
+      transition(':enter', [
+        style({ opacity: 0 }),
+        animate('5s', style({ opacity: 1 })),
+      ]),
+      transition(':leave', [
+        animate('5s', style({ opacity: 0 }))
+      ])
+    ]),
+// #enddocregion enter-leave-trigger
+  ],
+  templateUrl: 'insert-remove.component.html',
+  styleUrls: ['insert-remove.component.css']
+})
+export class InsertRemoveComponent {
+  isShown = false;
+
+  toggle() {
+    this.isShown = !this.isShown;
+  }
+}

aio/content/examples/animations/src/app/mock-heroes.ts

@@ -0,0 +1,15 @@
+// #docregion
+import { Hero } from './hero';
+
+export const HEROES: Hero[] = [
+  { id: 11, name: 'Mr. Nice' },
+  { id: 12, name: 'Narco' },
+  { id: 13, name: 'Bombasto' },
+  { id: 14, name: 'Celeritas' },
+  { id: 15, name: 'Magneta' },
+  { id: 16, name: 'RubberMan' },
+  { id: 17, name: 'Dynama' },
+  { id: 18, name: 'Dr IQ' },
+  { id: 19, name: 'Magma' },
+  { id: 20, name: 'Tornado' }
+];

aio/content/examples/animations/src/app/open-close-page.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-open-close-page',
+  template: `
+    <section>
+      <h2>Open Close Component</h2>
+      <input type="checkbox" [checked]="logging" (click)="toggleLogging()"/> Console Log Animation Events
+
+      <app-open-close [logging]="logging"></app-open-close>
+    </section>
+  `
+})
+export class OpenClosePageComponent {
+  logging = false;
+
+  toggleLogging() {
+    this.logging = !this.logging;
+  }
+}

aio/content/examples/animations/src/app/open-close.component.1.html

@@ -0,0 +1,10 @@
+<!-- #docplaster -->
+<nav>
+  <button (click)="toggle()">Toggle Open/Close</button>
+</nav>
+
+<!-- #docregion compare, trigger -->
+<div [@openClose]="isOpen ? 'open' : 'closed'" class="open-close-container">
+  <p>The box is now {{ isOpen ? 'Open' : 'Closed' }}!</p>
+</div>
+<!-- #enddocregion compare, trigger -->

aio/content/examples/animations/src/app/open-close.component.1.ts

@@ -0,0 +1,40 @@
+import { Component } from '@angular/core';
+import { trigger, transition, state, animate, style, keyframes } from '@angular/animations';
+
+@Component({
+  selector: 'app-open-close',
+  animations: [
+// #docregion trigger
+    trigger('openClose', [
+      state('open', style({
+        height: '200px',
+        opacity: 1,
+        backgroundColor: 'yellow'
+      })),
+      state('close', style({
+        height: '100px',
+        opacity: 0.5,
+        backgroundColor: 'green'
+      })),
+      // ...
+      transition('* => *', [
+        animate('1s', keyframes ( [
+          style({ opacity: 0.1, offset: 0.1 }),
+          style({ opacity: 0.6, offset: 0.2 }),
+          style({ opacity: 1,   offset: 0.5 }),
+          style({ opacity: 0.2, offset: 0.7 })
+        ]))
+      ])
+    ])
+// #enddocregion trigger
+  ],
+  templateUrl: 'open-close.component.html',
+  styleUrls: ['open-close.component.css']
+})
+export class OpenCloseKeyframeComponent {
+  isOpen = false;
+
+  toggle() {
+    this.isOpen = !this.isOpen;
+  }
+}

aio/content/examples/animations/src/app/open-close.component.2.html

@@ -0,0 +1,12 @@
+<!-- #docplaster -->
+<nav>
+  <button (click)="toggle()">Toggle Boolean/Close</button>
+</nav>
+
+<!-- #docregion trigger-boolean -->
+<div [@openClose]="isOpen ? true : false" class="open-close-container">
+<!-- #enddocregion trigger-boolean -->
+  <p>The box is now {{ isOpen ? 'Open' : 'Closed' }}!</p>
+<!-- #docregion trigger-boolean -->
+</div>
+<!-- #enddocregion trigger-boolean -->

aio/content/examples/animations/src/app/open-close.component.2.ts

@@ -0,0 +1,24 @@
+import { Component } from '@angular/core';
+import { trigger, transition, state, animate, style } from '@angular/animations';
+
+@Component({
+  selector: 'app-open-close-boolean',
+// #docregion trigger-boolean
+  animations: [
+    trigger('openClose', [
+      state('true', style({ height: '*' })),
+      state('false', style({ height: '0px' })),
+      transition('false <=> true', animate(500))
+    ])
+  ],
+// #enddocregion trigger-boolean
+  templateUrl: 'open-close.component.2.html',
+  styleUrls: ['open-close.component.css']
+})
+export class OpenCloseBooleanComponent {
+  isOpen = false;
+
+  toggle() {
+    this.isOpen = !this.isOpen;
+  }
+}

aio/content/examples/animations/src/app/open-close.component.3.html

@@ -0,0 +1,15 @@
+<!-- #docplaster -->
+<nav>
+  <button (click)="toggle()">Toggle Open/Close</button>
+</nav>
+
+<!-- #docregion callbacks -->
+  <div [@openClose]="isOpen ? 'open' : 'closed'"
+    (@openClose.start)="onAnimationEvent($event)"
+    (@openClose.done)="onAnimationEvent($event)"
+    class="open-close-container">
+<!-- #enddocregion callbacks -->
+  <p>The box is now {{ isOpen ? 'Open' : 'Closed' }}!</p>
+<!-- #docregion callbacks -->
+</div>
+<!-- #enddocregion callbacks -->

aio/content/examples/animations/src/app/open-close.component.3.ts

@@ -0,0 +1,48 @@
+// #docplaster
+// #docregion reusable
+import { Component } from '@angular/core';
+import { useAnimation, transition, trigger, style, animate } from '@angular/animations';
+import { transAnimation } from './animations';
+
+@Component({
+// #enddocregion reusable
+  selector: 'app-open-close-reusable',
+// #docregion runtime
+  animations: [
+    transition('open => closed', [
+      style({
+        height: '200 px',
+        opacity: '{{ opacity }}',
+        backgroundcolor: 'yelow'
+      }),
+      animate('{{ time }}'),
+    ], {
+        params: {
+          time: '1s',
+          opacity: '1'
+        }
+      }),
+// #enddocregion runtime
+// #docregion reusable
+    trigger('openClose', [
+      transition('open => closed', [
+        useAnimation(transAnimation, {
+          params: {
+            height: 0,
+            opacity: 1,
+            backgroundColor: 'red',
+            time: '1s'
+          }
+        })
+      ])
+    ])
+// #docregion runtime
+  ],
+// #enddocregion runtime
+// #enddocregion reusable
+  templateUrl: 'open-close.component.html',
+  styleUrls: ['open-close.component.css']
+// #docregion reusable
+})
+// #enddocregion reusable
+export class OpenCloseReusableComponent { }

aio/content/examples/animations/src/app/open-close.component.4.html

@@ -0,0 +1,12 @@
+<nav>
+  <button (click)="toggleAnimations()">Toggle Animations</button>
+  <button (click)="toggle()">Toggle Open/Closed</button>
+</nav>
+<!-- #docregion toggle-animation -->
+<div [@.disabled]="isDisabled">
+  <div [@childAnimation]="isOpen ? 'open' : 'closed'"
+    class="open-close-container">
+    <p>The box is now {{ isOpen ? 'Open' : 'Closed' }}!</p>
+  </div>
+</div>
+<!-- #enddocregion toggle-animation -->

aio/content/examples/animations/src/app/open-close.component.4.ts

@@ -0,0 +1,47 @@
+// #docplaster
+// #docregion
+import { Component } from '@angular/core';
+import { trigger, transition, state, animate, style } from '@angular/animations';
+
+// #docregion toggle-animation
+@Component({
+// #enddocregion toggle-animation
+  selector: 'app-open-close-toggle',
+  templateUrl: 'open-close.component.4.html',
+  styleUrls: ['open-close.component.css'],
+  // #docregion toggle-animation
+  animations: [
+    trigger('childAnimation', [
+      // ...
+// #enddocregion toggle-animation
+      state('open', style({
+        width: '250px',
+        opacity: 1,
+        backgroundColor: 'yellow'
+      })),
+      state('closed', style({
+        width: '100px',
+        opacity: 0.5,
+        backgroundColor: 'green'
+      })),
+      transition('* => *', [
+        animate('1s')
+      ]),
+// #docregion toggle-animation
+    ]),
+  ],
+})
+export class OpenCloseChildComponent {
+  isDisabled = false;
+  isOpen = false;
+// #enddocregion toggle-animation
+  toggleAnimations() {
+    this.isDisabled = !this.isDisabled;
+  }
+
+  toggle() {
+    this.isOpen = !this.isOpen;
+  }
+// #docregion toggle-animation
+}
+// #enddocregion toggle-animation

aio/content/examples/animations/src/app/open-close.component.css

@@ -0,0 +1,12 @@
+:host {
+  display: block;
+}
+
+.open-close-container {
+  border: 1px solid #dddddd;
+  margin-top: 1em;
+  padding: 20px 20px 0px 20px;
+  color: #000000;
+  font-weight: bold;
+  font-size: 20px;
+}

aio/content/examples/animations/src/app/open-close.component.html

@@ -0,0 +1,13 @@
+<!-- #docplaster -->
+<nav>
+  <button (click)="toggle()">Toggle Open/Close</button>
+</nav>
+
+<!-- #docregion compare, trigger -->
+<div [@openClose]="isOpen ? 'open' : 'closed'"
+  (@openClose.start)="onAnimationEvent($event)"
+  (@openClose.done)="onAnimationEvent($event)"
+  class="open-close-container">  
+  <p>The box is now {{ isOpen ? 'Open' : 'Closed' }}!</p>
+</div>
+<!-- #enddocregion compare, trigger -->

aio/content/examples/animations/src/app/open-close.component.ts

@@ -0,0 +1,110 @@
+// #docplaster
+import { Component, Input } from '@angular/core';
+import { trigger, transition, state, animate, style, AnimationEvent } from '@angular/animations';
+
+// #docregion component, events1
+@Component({
+  selector: 'app-open-close',
+// #docregion trigger, trigger-wildcard1, trigger-transition
+  animations: [
+    trigger('openClose', [
+// #enddocregion events1
+// #docregion state1, events1
+      // ...
+// #enddocregion events1
+      state('open', style({
+        height: '200px',
+        opacity: 1,
+        backgroundColor: 'yellow'
+      })),
+// #enddocregion state1
+// #docregion state2
+      state('closed', style({
+        height: '100px',
+        opacity: 0.5,
+        backgroundColor: 'green'
+      })),
+// #enddocregion state2, trigger-wildcard1
+// #docregion transition1
+      transition('open => closed', [
+        animate('1s')
+      ]),
+// #enddocregion transition1
+// #docregion transition2
+      transition('closed => open', [
+        animate('0.5s')
+      ]),
+// #enddocregion trigger, component
+// #enddocregion transition2
+// #docregion trigger-wildcard1
+      transition('* => closed', [
+        animate('1s')
+      ]),
+      transition('* => open', [
+        animate('0.5s')
+      ]),
+// #enddocregion trigger-wildcard1
+// #docregion trigger-wildcard2
+      transition('open <=> closed', [
+        animate('0.5s')
+      ]),
+// #enddocregion trigger-wildcard2
+// #docregion transition4
+      transition ('* => open', [
+        animate ('1s',
+          style ({ opacity: '*' }),
+        ),
+      ]),
+// #enddocregion transition4
+// #docregion transition3
+      transition('* => *', [
+        animate('1s')
+      ]),
+// #enddocregion transition3, trigger-transition
+// #docregion trigger, component, trigger-wildcard1, events1
+    ]),
+  ],
+// #enddocregion trigger, trigger-wildcard1
+  templateUrl: 'open-close.component.html',
+  styleUrls: ['open-close.component.css']
+})
+// #docregion events
+export class OpenCloseComponent {
+// #enddocregion events1, events
+  isOpen = true;
+
+  toggle() {
+    this.isOpen = !this.isOpen;
+  }
+
+// #enddocregion component
+  @Input() logging = false;
+// #docregion events1, events
+  onAnimationEvent ( event: AnimationEvent ) {
+// #enddocregion events1, events
+    if (!this.logging) {
+      return;
+    }
+// #docregion events
+    // openClose is trigger name in this example
+    console.warn(`Animation Trigger: ${event.triggerName}`);
+
+    // phaseName is start or done
+    console.warn(`Phase: ${event.phaseName}`);
+
+    // in our example, totalTime is 1000 or 1 second
+    console.warn(`Total time: ${event.totalTime}`);
+
+    // in our example, fromState is either open or closed
+    console.warn(`From: ${event.fromState}`);
+
+    // in our example, toState either open or closed
+    console.warn(`To: ${event.toState}`);
+
+    // the HTML element itself, the button in this case
+    console.warn(`Element: ${event.element}`);
+// #docregion events1
+  }
+// #docregion component
+}
+// #enddocregion component