build.yml

name: Build, Release & Publish to ghcr

permissions:
  contents: write
  packages: write

on:
  push:
    branches:
      - release
      - main

jobs:
  build_release:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Fetch all Git tags
        run: git fetch --tags

      - name: Set up Go cache
        uses: actions/cache@v4
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-


      - name: Check for new commits since last tag
        if: github.ref == 'refs/heads/release'
        id: check_commits
        run: |
          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
          echo "last_tag=$LAST_TAG" >> $GITHUB_OUTPUT

          if [ -z "$LAST_TAG" ]; then
            echo "no_last_tag=true" >> $GITHUB_OUTPUT
            echo "no_new_commits=false" >> $GITHUB_OUTPUT
          else
            NEW_COMMITS=$(git log ${LAST_TAG}..HEAD --oneline)
            echo "no_new_commits=$([ -z "$NEW_COMMITS" ] && echo true || echo false)" >> $GITHUB_OUTPUT
          fi

      - name: Get next version
        if: github.ref == 'refs/heads/release' && steps.check_commits.outputs.no_new_commits != 'true'
        id: version
        uses: mathieudutour/github-tag-action@v6.2
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          release_branches: release
          tag_prefix: "v"
          custom_release_rules: |
            major:major:Breaking Changes
            minor:minor:Features
            patch:patch:Bug Fixes or other non-feature changes

      - name: Generate changelog
        if: github.ref == 'refs/heads/release' && steps.check_commits.outputs.no_new_commits != 'true'
        id: changelog
        run: |
          PREV_TAG=${{ steps.check_commits.outputs.last_tag }}
          
          {
            echo "# What's Changed"
            echo ""
            git log ${PREV_TAG}..HEAD --pretty=format:"%H|%s" | while IFS="|" read -r COMMIT_HASH MESSAGE; do
              AUTHOR_LOGIN=$(gh api repos/${{ github.repository }}/commits/$COMMIT_HASH --jq '.author.login // empty' 2>/dev/null || echo "")
              SHORT_HASH=${COMMIT_HASH:0:7}
          
              if [[ "$AUTHOR_LOGIN" == *"bot"* ]] || [[ -z "$AUTHOR_LOGIN" ]]; then
                AUTHOR_NAME=$(gh api repos/${{ github.repository }}/commits/$COMMIT_HASH --jq '.commit.author.name // empty' 2>/dev/null || echo "Unknown")
                echo "- $MESSAGE ([$SHORT_HASH](https://github.com/${{ github.repository }}/commit/$COMMIT_HASH)) by $AUTHOR_NAME"
              else
                echo "- $MESSAGE ([$SHORT_HASH](https://github.com/${{ github.repository }}/commit/$COMMIT_HASH)) by @$AUTHOR_LOGIN"
              fi
            done
          } > RELEASE_NOTES.md
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Create GitHub Release
        if: github.ref == 'refs/heads/release' && steps.check_commits.outputs.no_new_commits != 'true'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.new_tag }}
          name: "MineTracker-Backend | ${{ steps.version.outputs.new_tag }}"
          body_path: RELEASE_NOTES.md

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Generate Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository_owner }}/minetracker-backend
          tags: |
            type=raw,value=${{ steps.version.outputs.new_tag }}+{{sha}},enable=${{ github.ref == 'refs/heads/release' && steps.check_commits.outputs.no_new_commits != 'true' }}
            type=raw,value=latest
            type=raw,value=dev-{{sha}},enable=${{ github.ref == 'refs/heads/main' }}
            type=raw,value=dev,enable=${{ github.ref == 'refs/heads/main' }}

      - name: Build and push Docker image
        if: steps.meta.outputs.tags != ''
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ github.ref == 'refs/heads/release' && 'linux/amd64,linux/arm64' || 'linux/amd64' }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            BUILDKIT_INLINE_CACHE=1