check-changelog.yml

name: Changelog Check

on:
  pull_request:
    types: [opened, synchronize, reopened, labeled, unlabeled]

jobs:
  changelog-check:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      with:
        fetch-depth: 2 # Only need preceeding commit

    - name: Check for no-changelog label
      id: label-check
      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
      with:
        script: |
          const payload = context.payload;
          const label = !!payload.pull_request.labels.find(l => l.name === 'no-changelog');
          core.setOutput('has_label', label.toString());

    - name: Check if CHANGELOG.md was modified
      id: changelog-check
      if: steps.label-check.outputs.has_label == 'false'
      uses: tj-actions/changed-files@4edd678ac3f81e2dc578756871e4d00c19191daf # v45.0.4
      with:
        files: |
          CHANGELOG.md

    - name: Assert CHANGELOG.md is modified
      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
      if: steps.label-check.outputs.has_label == 'false' && steps.changelog-check.outputs.any_changed != 'true'
      with:
        script: |
          core.setFailed("No changes to CHANGELOG.md detected. Add 'no-changelog' label if this is intentional.")