build-docker.yml

name: build docker image

on:
  push:
    branches:
      - main
    tags:
      - v*
  pull_request:
    branches:
      - main

jobs:
  dockerize:
    name: Build Docker image and push to GitHub Container Registry
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

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

      - name: Set environment variables for docker build
        run: |
          # Lowercase repo for Github Container Registry
          echo "REPO=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          # Ensure tags are checked out
          git fetch origin +refs/tags/*:refs/tags/*
          # Version number from tag
          echo "MINTPY_VERSION=$(git describe --tags)" >> $GITHUB_ENV

      - name: Build, tag, and push image to Github Container Registry
        uses: docker/build-push-action@v6
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: |
            ghcr.io/${{ env.REPO }}:${{ env.MINTPY_VERSION }}
          labels: |
            org.opencontainers.image.created=${{ env.CI_JOB_TIMESTAMP }}
            org.opencontainers.image.version=${{ env.MINTPY_VERSION }}
            org.opencontainers.image.revision=${{ github.sha }}

      - name: Add develop tag
        if: github.ref == 'refs/heads/main'
        uses: akhilerm/tag-push-action@v2.2.0
        with:
          src: ghcr.io/${{ env.REPO }}:${{ env.MINTPY_VERSION }}
          dst: ghcr.io/${{ env.REPO }}:develop

      - name: Add latest tag
        if: startsWith(github.ref, 'refs/tags/v')
        uses: akhilerm/tag-push-action@v2.2.0
        with:
          src: ghcr.io/${{ env.REPO }}:${{ env.MINTPY_VERSION }}
          dst: ghcr.io/${{ env.REPO }}:latest