Previously, `aio/aio-builds-setup/scripts/travis-preverify-pr.sh` was supposed
to exit with 1 if a PR did not meet the preconditions and 2 if an error occurred
during pre-verification.
It relied on the exit codes of the node script that did the actual work, but
didn't account for errors that would be thrown in the `sh` script itself (e.g.
if the node script was not available). This caused such errors to appear as
non-verified PRs, instead of real errors that should fail the build.
This commit swaps the exit codes, so that now a 2 means non-verified PR and 1
designates an error.
Previously, no previews would be deployed for PRs that didn't touch files inside
`aio/`. Now, previews will be deployed for PRs that touch non-spec files inside
either `aio/` or `packages/` (as long as other preconditions are met).
Partially addresses #16526.
Previously, when trying to upload the build artifacts for a PR/SHA that was
already successfully deployed (e.g. when re-running a Travis job), the preview
server would return a 403 and the build would fail.
Since we have other mechanisms to verify that the PR author is trusted and the
artifacts do indeed come from the specified PR and since the new artifacts
should be the same with the already deployed ones (same SHA), there is no reason
to fail the build. The preview server will reject the request with a special
HTTP status code (409 - Conflict), which the `deploy-preview` script will
recognize and exit with 0.
This reverts commit d0bc83ca27.
Protractor-based prerendering is flakey on Travis and takes several minutes to
complete, slowing down the build. Prerendering has a lower impact now that we
use a ServiceWorker. We will revisit in the future (probably using a
`PlatformServer`-based approach).
PR Close#15346
Gaining access to another PR's JWT, would allow faking that PR's author wrt to
GitHub team membership verification for as long as the JWT is valid (currently
90 mins).
Georgios Kalpakas