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feat(docs-infra): add API endpoint for checking if PR can have preview (#25671)

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There several reasons why PRs cannot have (public) previews:
- The PR did not affect any relevant files (e.g. non-spec files in
  `aio/` or `packages/`).
- The PR cannot be automatically verified as "trusted" (based on its
  author or labels).

Note:
The endpoint does not check whether there currently is a (public)
preview for the specified PR; only whether there can be one.

PR Close #25671
This commit is contained in:
George Kalpakas
2018-08-26 00:29:14 +03:00
committed by Kara Erickson
parent f378454c92
commit 6d6b0ff1ad
7 changed files with 304 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
aio/aio-builds-setup/dockerbuild/scripts-js/lib/preview-server/preview-server-factory.ts
View File

@ -64,10 +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 {
@ -108,7 +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.`);