release.yml

name: Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Version (e.g. 2026.0.0 or 1.2.3)'
        required: true
        type: string
      scheme:
        description: 'Version scheme'
        required: true
        type: choice
        options:
          - calver
          - semver
        default: calver
  push:
    tags:
      - '[0-9]*'

permissions:
  contents: write
  pull-requests: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          ref: main
          fetch-depth: 0
          token: ${{ secrets.PAT || secrets.GITHUB_TOKEN }}
          persist-credentials: true

      - name: Determine version and scheme
        id: version
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            TAG="${{ github.event.inputs.version }}"
            SCHEME="${{ github.event.inputs.scheme }}"
          else
            TAG="${GITHUB_REF_NAME}"
            if echo "$TAG" | grep -qE '^[0-9]{4}\.[0-9]+\.[0-9]+$'; then
              SCHEME="calver"
            else
              SCHEME="semver"
            fi
          fi
          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
          echo "scheme=$SCHEME" >> "$GITHUB_OUTPUT"

      - name: Validate version format
        run: |
          TAG="${{ steps.version.outputs.tag }}"
          SCHEME="${{ steps.version.outputs.scheme }}"
          if [ "$SCHEME" = "calver" ]; then
            if ! echo "$TAG" | grep -qE '^[0-9]{4}\.[0-9]+\.[0-9]+$'; then
              echo "Error: Version must be in CalVer format YYYY.MINOR.PATCH (e.g. 2026.0.0)"
              exit 1
            fi
          else
            if ! echo "$TAG" | grep -qE '^[0-9]+\.[0-9]+\.[0-9]+$'; then
              echo "Error: Version must be in SemVer format MAJOR.MINOR.PATCH (e.g. 1.2.3)"
              exit 1
            fi
          fi

      - name: Create and push tag
        if: github.event_name == 'workflow_dispatch'
        run: |
          git tag "${{ steps.version.outputs.tag }}"
          git push origin "${{ steps.version.outputs.tag }}"

      - name: Get previous tag
        id: previous
        run: |
          CURRENT="${{ steps.version.outputs.tag }}"
          PREVIOUS=$(git tag --list --sort=-version:refname '[0-9]*' | grep -v "^${CURRENT}$" | head -1)
          if [ -n "$PREVIOUS" ]; then
            echo "tag=$PREVIOUS" >> "$GITHUB_OUTPUT"
            echo "found=true" >> "$GITHUB_OUTPUT"
          else
            echo "tag=" >> "$GITHUB_OUTPUT"
            echo "found=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Generate changelog
        if: steps.previous.outputs.found == 'true'
        id: changelog
        uses: requarks/changelog-action@v1
        with:
          token: ${{ github.token }}
          fromTag: ${{ steps.version.outputs.tag }}
          toTag: ${{ steps.previous.outputs.tag }}
          excludeTypes: build,docs,other,style,ci,chore
          useGitmojis: false
          writeToFile: false

      - name: Create GitHub release
        uses: softprops/action-gh-release@v3
        with:
          tag_name: ${{ steps.version.outputs.tag }}
          name: ${{ steps.version.outputs.tag }}
          body: ${{ steps.changelog.outputs.changes || 'Initial release' }}

      - name: Write changelog to file
        if: steps.previous.outputs.found == 'true'
        uses: requarks/changelog-action@v1
        with:
          token: ${{ github.token }}
          fromTag: ${{ steps.version.outputs.tag }}
          toTag: ${{ steps.previous.outputs.tag }}
          excludeTypes: build,docs,other,style,ci,chore
          useGitmojis: false
          writeToFile: true

      - name: Commit updated CHANGELOG
        if: steps.previous.outputs.found == 'true'
        uses: stefanzweifel/git-auto-commit-action@v7
        with:
          branch: main
          commit_message: "docs: update CHANGELOG for ${{ steps.version.outputs.tag }}"
          file_pattern: CHANGELOG.md