action to detect a keyword in the commit summary line

[keewis]

follow-up to #4729 and #4730

To use the detect-ci-trigger action in workflows, add a new job:

detect-ci-trigger:
name: Detect CI Triggerruns-on: ubuntu-latestoutputs:
triggered: ${{ steps.detect-trigger.outputs.trigger-found }}steps:
- uses: actions/checkout@v2
- uses: ./.github/actions/detect-ci-triggerid: detect-triggerwith:
keyword: "<keyword>"

then require the new job in jobs that should be conditionally skipped:

my-ci-job:
runs-on: ubuntu-latestneeds: detect-ci-triggerif: needs.detect-ci-trigger.outputs.triggered == 'false' # for skip-ci# if: needs.detect-ci-trigger.outputs.triggered == 'true' # for test-upstreamsteps:
- actions/checkout@v2# ...

unfortunately, this still requires actions/checkout with fetch-depth, I can't seem to get a git fetch in the action script to work. Edit: git fetch --deepen=1 instead of git fetch --depth=2 seems to work.

cc @andersy005

[keewis]

should we merge this first and then use it in #4729 and #4730?

[andersy005]

This looks great 👍🏽

should we merge this first and then use it in #4729 and #4730?

Sounds good

[keewis]

thanks for the review, @andersy005.