name: Build and push Docker image
on:
  push:
    paths:
    - 'Myriad/**'
    - 'PluralKit.API/**'
    - 'PluralKit.Bot/**'
    - 'PluralKit.Core/**'

jobs:
  deploy:
    runs-on: ubuntu-latest
    permissions:
      packages: write
    if: github.repository == 'PluralKit/PluralKit'
    steps:
      - uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.CR_PAT }}
      - uses: actions/checkout@v2
      - run: echo "BRANCH_NAME=${GITHUB_REF#refs/heads/}" | sed 's|/|-|g' >> $GITHUB_ENV

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value=${{ env.BRANCH_NAME }}
            type=raw,value=${{ github.sha }}
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
          flavor: |
            latest=false

      - uses: docker/build-push-action@v2
        with:
          # https://github.com/docker/build-push-action/issues/378
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          cache-from: type=registry,ref=ghcr.io/pluralkit/pluralkit:${{ env.BRANCH_NAME }}
          cache-to: type=inline