Currently the `commit-message` validation script does not exit
with a non-zero exit code if the commit message validation failed.
This means that invalid commit messages are currently not
causing CI to be red. See: https://circleci.com/gh/angular/angular/686008
PR Close#36723
Prior to this change we manage a local version of commit message validation
in addition to the commit message validation tool contained in the ng-dev
tooling. By adding the ability to validate a range of commit messages
together, the remaining piece of commit message validation that is in the
local version is replicated.
We use both commands provided by the `ng-dev commit-message` tooling:
- pre-commit-validate: Set to automatically run on an git hook to validate
commits as they are created locally.
- validate-range: Run by CI for every PR, testing that all of the commits
added by the PR are valid when considered together. Ensuring that all
fixups are matched to another commit in the change.
PR Close#36172
Paul Gschwendtner
Joey Perrott