Trigger github workflow on pattern match in newly opened issue title - with ACKs

issue-title-trigger.yaml

name: issue title trigger
on:
  # this workflow tests triggering a workflow via matching a pattern
  # in a newly opened issue's title
  # it then uses the github-script action to notify on the state
  # of the workflow
  issues:
    types: [opened]
jobs:
  #ack trigger and do stuff in parallel
  Ack-doing-stuff:
    runs-on: ubuntu-latest
    if: startsWith(github.event.issue.title, '[/do-stuff]')
    steps:
      - name: Ack request
        uses: actions/github-script@0.9.0
        with:
          script: |
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '🆗 doing stuff...⏳'
            })
  Do-stuff:
    runs-on: ubuntu-latest
    if: startsWith(github.event.issue.title, '[/do-stuff]')
    steps:
      - name: Do-stuff
        run: |
          echo doing stuff...
          sleep 3
      # if Do stuff is successful, the next step will not run
      # and the job will be marked as a success
      - name: Notify-failure
        if: failure()
        uses: actions/github-script@0.9.0
        with:
          script: |
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '💀 failed to do stuff'
            })
  Ack-Success:
    runs-on: ubuntu-latest
    # will only run if Do-stuff succeeds. Unless we add the conditional: if: always()
    needs: Do-stuff
    steps:
      - name: Ack-success
        uses: actions/github-script@0.9.0
        with:
          script: |
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '✔ did stuff successfully'
            })

issue_triggered_workflow.png