In #38666 we changed how ngcc deals with type expressions, where it
would now always emit the original type expression into the generated
code as a "local" type value reference instead of synthesizing new
imports using an "imported" type value reference. This was done as a fix
to properly deal with renamed symbols, however it turns out that the
compiler has special handling for certain imported symbols, e.g.
`ChangeDetectorRef` from `@angular/core`. The "local" type value
reference prevented this special logic from being hit, resulting in
incorrect compilation of pipe factories.
This commit fixes the issue by manually inspecting the import of the
type expression, in order to return an "imported" type value reference.
By manually inspecting the import we continue to handle renamed symbols.
Fixes#38883
PR Close#38892
Common AST formats such as TS and Babel do not use a separate
node for comments, but instead attach comments to other AST nodes.
Previously this was worked around in TS by creating a `NotEmittedStatement`
AST node to attach the comment to. But Babel does not have this facility,
so it will not be a viable approach for the linker.
This commit refactors the output AST, to remove the `CommentStmt` and
`JSDocCommentStmt` nodes. Instead statements have a collection of
`leadingComments` that are rendered/attached to the final AST nodes
when being translated or printed.
PR Close#38811
Because PhantomJS has been deprecated since March 2018, and `newEvent`
is very confusing for newcomers that read the testing documentation,
we remove it entirely, and instead assume most, if not all, newcomers
will run tests in Chrome as it is the default.
Fixes#23370
PR Close#37251
This commit simplifies the tests of `EventsComponent` (by introducing a
`createMockEvent()` helper and getting rid of the irrelevant `Event`
fields) and adds tests for some more usecases. It also makes the tests
more robust by using Jasmine's `Clock` to mock the current date.
PR Close#36517
In the events.json file most of tooltips are same as name so there
were of no use, as they were providing no extra information. So,
removed them from the events.json file
PR Close#36517
Data in events page was hardcoded and it is manually moved in the table.
Created a new events widget which will automatically move past and upcoming
events from events.json (`aio/content/marketing/events.json`) file to the
relevant table in the events tab
PR Close#36517
This commit improves the typeahead example, by using the emitted input
value. It also adds a unit test to ensure that the example is working
as intended.
PR Close#34190
ngc angular compiler was not mentioned in the glossary.
Glossary should contain the relevant terms in angular
which are hard to get. So, added a small defination of
ngc to the glossary
PR Close#36781
In the integration test suite of ngcc, we load a set of files from
`node_modules` into memory. This includes the `typescript` package and
`@angular` scoped packages, which account for a large number of large
files that needs to be loaded from disk. This commit moves this work
to the top-level, such that it doesn't have to be repeated in all tests.
PR Close#38840
Recent optimizations to ngcc have significantly reduced the total time
it takes to process `node_modules`, to such extend that sharding across
multiple processes has become less effective. Previously, running
ngcc asynchronously would allow for up to 8 workers to be allocated,
however these workers have to repeat work that could otherwise be shared.
Because ngcc is now able to reuse more shared computations, the overhead
of multiple workers is increased and therefore becomes less effective.
As an additional benefit, having fewer workers requires less memory and
less startup time.
To give an idea, using the following test setup:
```bash
npx @angular/cli new perf-test
cd perf-test
yarn ng add @angular/material
./node_modules/.bin/ngcc --properties es2015 module main \
--first-only --create-ivy-entry-points
```
We observe the following figures on CI:
| | 10.1.1 | PR #38840 |
| ----------------- | --------- | --------- |
| Sync | 85s | 25s |
| Async (8 workers) | 22s | 16s |
| Async (4 workers) | - | 11s |
In addition to changing the default number of workers, ngcc will now
use the environment variable `NGCC_MAX_WORKERS` that may be configured
to either reduce or increase the number of workers.
PR Close#38840
ngcc creates typically two `ts.Program` instances for each entry-point,
one for processing sources and another one for processing the typings.
The creation of these programs is somewhat expensive, as it concerns
module resolution and parsing of source files.
This commit implements several layers of caching to optimize the
creation of programs:
1. A shared module resolution cache across all entry-points within a
single invocation of ngcc. Both the sources and typings program
benefit from this cache.
2. Sharing the parsed `ts.SourceFile` for a single entry-point between
the sources and typings program.
3. Sharing parsed `ts.SourceFile`s of TypeScript's default libraries
across all entry-points within a single invocation. Some of these
default library typings are large and therefore expensive to parse,
so sharing the parsed source files across all entry-points offers
a significant performance improvement.
Using a bare CLI app created using `ng new` + `ng add @angular/material`,
the above changes offer a 3-4x improvement in ngcc's processing time
when running synchronously and ~2x improvement for asynchronous runs.
PR Close#38840
As part of the commit message conformance check, local commit message checks are
made to be warnings rather than failures. An additional local option is also in
place to allow for the commit message validation failures to be considered errors
instead.
PR Close#38784
When type-checking a component, the declaring NgModule scope is used
to create a directive matcher that contains flattened directive metadata,
i.e. the metadata of a directive and its base classes. This computation
is done for all components, whereas the type-check scope is constant per
NgModule. Additionally, the flattening of metadata is constant per
directive instance so doesn't necessarily have to be recomputed for
each component.
This commit introduces a `TypeCheckScopes` class that is responsible
for flattening directives and computing the scope per NgModule. It
caches the computed results as appropriate to avoid repeated computation.
PR Close#38843
For the compilation of a component, the compiler has to prepare some
information about the directives and pipes that are used in the template.
This information includes an expression for directives/pipes, for usage
within the compilation output. For large NgModule compilation scopes
this has shown to introduce a performance hotspot, as the generation of
expressions is quite expensive. This commit reduces the performance
overhead by only generating expressions for the directives/pipes that
are actually used within the template, significantly cutting down on
the compiler's resolve phase.
PR Close#38843
Currently we validate the configuration file on each `getConfig`
invocation. We can only validate once since the configuration
is cached.
Also while being at it, renames the cache variables to lower-case as those
do not represent constants (which are convention-wise upper case).
PR Close#38808
This commit creates a sample router test application to introduce the
symbol tests. It serves as a guard to ensure that any future work on the
router package does not unintentionally increase the payload size.
PR Close#38714
Recent work on compiler internals in #38539 led to an unexpected failure,
where a pipe used exclusively inside of an ICU would no longer be
emitted into the compilation output. This caused runtime errors due to
missing pipes.
The issue occurred because the change in #38539 would determine the set
of used pipes up-front, independent from the template compilation using
the `R3TargetBinder`. However, `R3TargetBinder` did not consider
expressions within ICUs, so any pipe usages within those expressions
would not be detected. This fix unblocks #38539 and also concerns
upcoming linker work, given that prelink compilations would not go
through full template compilation but only `R3TargetBinder`.
PR Close#38810
Some lower level APIs are used by CLI, and requiring
the `formatOpions` argument at that level is a
breaking change. This commit makes it optional
at every level to avoid the breaking change.
PR Close#38787
As part of the migration to a common strategy/method for branching and releasing across
the main angular repositories, updates need to be made to the documentation. These changes
reflect the updates made and is based on the following document which describes the
merging label expectations: https://docs.google.com/document/d/197kVillDwx-RZtSVOBtPb4BBIAw0E9RT3q3v6DZkykU
PR Close#38401
PR Close#38793
The `RefreshTransplantedView` flag is used to indicate that the view or one of its children
is transplanted and dirty, so it should still be refreshed as part of change detection.
This flag is set on the transplanted view itself as well setting a
counter on as its parents.
When a transplanted view is detached and still has this flag, it means
it got detached before it was refreshed. This can happen for "backwards
references" or transplanted views that are inserted at a location that
was already checked. In this case, we should decrement the parent
counters _and_ clear the flag on the detached view so it's not seen as
"transplanted" anymore (it is detached and has no parent counters to
adjust).
fixes#38619
PR Close#38768
There is a slight difference between `map`...`concatAll` and `concatMap`
in that the latter (`concatMap`) will ensure that the computations are
executed in-order and only if needed while the former may execute the
`map` body of all items if they do not emit immediately. That is, if the stream
is
`from([a, b, c]).pipe(map(v => of(v).pipe(delay(1))), concatAll(), first())`
the `map` body will execute for all of `a`, `b`, and `c`.
However, the following will only execute the `concatMap` body for `a`
`from([a, b, c]).pipe(concatMap(v => of(v).pipe(delay(1))), first())`
See https://stackblitz.com/edit/rxjs-cvwxyxfixes#38691
PR Close#38780
This commit improves the error thrown by the downgrade module with a more
descriptive message on why the downgrade is failing.
Closes#37579
PR Close#38671
As not all users, particularly contributors consistently contributing with a deep
understanding of our commit message guidelines, will not want to rely on the
commit message wizard, we allow a user to opt out of using this wizard during
commit message creation.
PR Close#38701
Create a utility for loading a local user configuration object to describe
local configuration values, such as skipping the commit message wizard.
PR Close#38701
Previously, the validateCommitMessage function ran validation and logged the results.
The validateCommitMessage function now returns an object containing the validation
results and the cli action functions are instead responsible for logging the results.
This is being done as a prefactor for a change which allows for commit message
hook validation to be either a blocking error or a warning.
PR Close#38703
In the test project there are no longer reference markers and location
markers, so there's no need to "pre-process" the source files to remove
them. This will make the Ivy tests cleaner and faster.
PR Close#38777
