deploy.yml

name: Deploy

on:
  workflow_dispatch:
  schedule:
    # Every Friday at 16:00 UTC; the gate job filters to even ISO weeks so
    # the stable release runs at most once every two weeks.
    - cron: '0 16 * * 5'

jobs:
  gate:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      should_release: ${{ steps.gate.outputs.should_release }}
    steps:
      - uses: actions/checkout@v6.0.2
        with:
          fetch-depth: 0

      - name: Decide whether to release
        id: gate
        run: |
          if [ "${{ github.event_name }}" != "schedule" ]; then
            echo "Manual dispatch; proceeding."
            echo "should_release=true" >> $GITHUB_OUTPUT
            exit 0
          fi

          WEEK=$((10#$(date -u +%V)))
          if [ $((WEEK % 2)) -ne 0 ]; then
            echo "ISO week $WEEK is odd; biweekly release runs only on even weeks. Skipping."
            echo "should_release=false" >> $GITHUB_OUTPUT
            exit 0
          fi

          VERSION=$(awk -F= '/^version=/{print $2}' src/resources/app.properties)
          TAG="v${VERSION}"
          if git rev-parse "$TAG" >/dev/null 2>&1; then
            echo "Tag $TAG already exists; version has not been bumped since last release. Skipping."
            echo "should_release=false" >> $GITHUB_OUTPUT
            exit 0
          fi

          echo "Even ISO week $WEEK with unreleased version $VERSION; proceeding."
          echo "should_release=true" >> $GITHUB_OUTPUT

  deploy:
    needs: gate
    if: needs.gate.outputs.should_release == 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v6.0.2
        with:
          fetch-depth: 0

      - name: Read version from app.properties
        id: version
        run: |
          VERSION=$(awk -F= '/^version=/{print $2}' src/resources/app.properties)
          echo "tag=v${VERSION}" >> $GITHUB_OUTPUT

      - name: Check if tag exists
        id: tag
        run: |
          if git rev-parse "${{ steps.version.outputs.tag }}" >/dev/null 2>&1; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Fail if tag already exists
        if: steps.tag.outputs.exists == 'true'
        run: |
          echo "::error::Tag ${{ steps.version.outputs.tag }} already exists. Bump the version in src/resources/app.properties."
          exit 1

      - name: Create and push tag
        if: steps.tag.outputs.exists == 'false'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git tag ${{ steps.version.outputs.tag }}
          git push origin ${{ steps.version.outputs.tag }}

      - uses: actions/setup-go@v6.3.0
        with:
          go-version: "1.25.5"

      - uses: goreleaser/goreleaser-action@v7.0.0
        with:
          version: "~> v2"
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          HOMEBREW_TOKEN: ${{ secrets.HOMEBREW_TOKEN }}