generate_changelog.yml

name: Generate CHANGELOG
on:
  pull_request:
    types: [closed]
  workflow_dispatch:
jobs:
  go-version:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.go-version.outputs.version }}
    steps:
      - uses: actions/checkout@v2
      - id: go-version
        run: echo "::set-output name=version::$(cat ./.go-version)"
  GenerateChangelog:
    needs: [go-version]
    if: github.event.pull_request.merged || github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - uses: actions/setup-go@v2
        with:
          go-version: ${{ needs.go-version.outputs.version }}
      - run: go get github.com/miniscruff/changie
      - run: |
          changie batch $(changie latest)
          changie merge
          
          if [[ `git status --porcelain` ]]; then
            if ${{github.event_name == 'workflow_dispatch'}}; then
              MSG="Update CHANGELOG.md (Manual Trigger)"
            else
              MSG="Update CHANGELOG.md for #${{ github.event.pull_request.number }}"
            fi
            git config --local user.email changelogbot@hashicorp.com
            git config --local user.name changelogbot
            # ignore files deleted after `changie batch`
            git add CHANGELOG.md .changelog/$(changie latest).md
            git commit -m "$MSG" 
            git push
          fi