.github/workflows/generate-changelog.yml

name: Generate changelog

on: [ workflow_dispatch ]

jobs:
  publish:
    runs-on: ubuntu-latest
    if: github.repository == 'pinterest/ktlint'
    steps:
      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
        with:
          fetch-depth: 0 # fetch all commits/branches/tags

      - uses: actions/setup-java@v3
        with:
          distribution: 'zulu'
          java-version: 19

      - uses: gradle/gradle-build-action@v2
        with:
          gradle-home-cache-cleanup: true

      - name: Get last released version
        run: echo "version=$(git describe --abbrev=0 --tags)" >> $GITHUB_ENV

      - name: "Build Changelog"
        id: build_changelog
        uses: mikepenz/release-changelog-builder-action@v4
        with:
          fromTag: "${{ env.version }}"
          # This Github action is run before building a new release. All PR's created after last release and between current HEAD are to be
          # included
          toTag: "HEAD"
          configurationJson: |
            {
              "template": "## [Unreleased]\n\n#{{CHANGELOG}}",
              "categories": [
                {
                  "title": "### 💔 Breaking changes",
                  "labels": ["api changelog"],
                  "exclude_labels": ["exclude from changelog"]
                },
                {
                  "title": "### 🆕 Features",
                  "labels": ["feature changelog"],
                  "exclude_labels": ["exclude from changelog"],
                  "empty_content": "None"
                },
                {
                  "title": "### 🔧 Fixes",
                  "labels": ["fix changelog"],
                  "exclude_labels": ["exclude from changelog"],
                  "empty_content": "None"
                },
                {
                  "title": "### 📦 Dependencies",
                  "exhaustive_rules": false,
                  "rules": [
                    {
                      "pattern": "dependency changelog",
                      "on_property": "labels"
                    },
                    {
                      "pattern": "renovate\\[bot\\]",
                      "on_property": "author"
                    }
                  ],
                  "exclude_labels": ["exclude from changelog"]
                },
                {
                  "title": "### 💬 Other",
                  "labels": [],
                  "exclude_labels": ["documentation", "exclude from changelog"]
                }
              ],
              "pr_template": "\n* #{{TITLE}} - [##{{NUMBER}}](#{{URL}}), by @#{{AUTHOR}}",
              "empty_template": "- no changes",
              "sort": {
                "order": "ASC",
                "on_property": "mergedAt"
              },
              "max_pull_requests": 1000,
              "max_back_track_time_days": 1000
            }
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Echo generated changelog
        env:
          CHANGELOG: ${{ steps.build_changelog.outputs.changelog }}
        run: echo -e "$CHANGELOG"