docker.yml

name: Build

on:
  workflow_dispatch:
  push:
    branches:
      - '*'
  pull_request:
    branches:    
      - '**'        # matches every branch

env:
  IMAGE_NAME: ghcr.io/yuuki-discord/yuuki-bot
jobs:
  docker:
    name: Docker ${{ matrix.platform }}
    runs-on: ${{ matrix.runner }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - runner: ubicloud-standard-2
            platform: linux/amd64
          - runner: ubicloud-standard-2-arm
            platform: linux/arm64,linux/arm/v6,linux/arm/v7

    steps:
      - name: Check out code
        uses: actions/checkout@v4
      
      - name: Set default branch variable
        run : |
          if [[ $GITHUB_REF_NAME == 'main' ]]; then
              echo "IS_MAIN_BRANCH=true" >> "$GITHUB_ENV"
          else
              echo "IS_MAIN_BRANCH=false" >> "$GITHUB_ENV"
          fi

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

      -
        name: Login to GitHub Container Registry
        if: github.ref == 'refs/heads/master'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: yuuki-discord
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=sha,prefix=
            type=ref,event=branch
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha,scope=ubicloud-${{ matrix.runner }}
          cache-to: type=gha,mode=max,scope=ubicloud-${{ matrix.runner }}
          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=${{env.IS_MAIN_BRANCH}},name-canonical=${{env.IS_MAIN_BRANCH}},push=${{env.IS_MAIN_BRANCH}}
          provenance: false

      - name: Export digest
        if: github.ref == 'refs/heads/master'
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        if: github.ref == 'refs/heads/master'
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.runner }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    if: github.ref == 'refs/heads/master'
    runs-on: ubicloud
    needs:
      - docker
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          pattern: digests-*
          merge-multiple: true
          path: /tmp/digests
      - 
        name: Login to GitHub Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.PAT }}
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=sha,prefix=
            type=ref,event=branch
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}