name: license

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - '*'
      - 'release-branch/*'

concurrency:
  group: ${{ github.workflow }}-$${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - name: Check out code
      uses: actions/checkout@v3

    - name: Set up Go
      uses: actions/setup-go@v3
      with:
        go-version-file: go.mod

    - name: Run license checker
      run: ./scripts/check_license_headers.sh .

    - uses: k0kubun/action-slack@v2.0.0
      with:
        payload: |
          {
            "attachments": [{
              "text": "${{ job.status }}: ${{ github.workflow }} <https://github.com/${{ github.repository }}/commit/${{ github.sha }}/checks|${{ env.COMMIT_DATE }} #${{ env.COMMIT_NUMBER_OF_DAY }}> " +
                      "(<https://github.com/${{ github.repository }}/commit/${{ github.sha }}|" + "${{ github.sha }}".substring(0, 10) + ">) " +
                      "of ${{ github.repository }}@" + "${{ github.ref }}".split('/').reverse()[0] + " by ${{ github.event.head_commit.committer.name }}",
              "color": "danger"
            }]
          }
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
      if: failure() && github.event_name == 'push'