name: "Automated release"

on:
  push:
    tags:
      - "v*"

jobs:
  publish-docker:
    name: "Build and publish Docker image on ghcr.io"
    runs-on: ubuntu-latest
    steps:
      - name: "Checkout repository"
        uses: "actions/checkout@v2"

      - name: "Find the release semantic version"
        id: "semver"
        uses: "Steffo99/actions-semver@v0.3.4"
        with:
          string: "${{ github.ref_name }}"

      - name: "Setup Buildx"
        uses: "docker/setup-buildx-action@v2"

      - name: "Login to GitHub Containers"
        uses: "docker/login-action@v2"
        with:
          registry: "ghcr.io"
          username: "${{ github.repository_owner }}"
          password: "${{ secrets.GITHUB_TOKEN }}"

      - name: "Find the lowercase name of the repository"
        id: "reponame"
        uses: "ASzc/change-string-case-action@v2"
        with:
          string: "${{ github.repository }}"

      - name: "Build and push the Docker image"
        uses: "docker/build-push-action@v3"
        with:
          tags: >-
            ghcr.io/${{ steps.reponame.outputs.lowercase }}:${{ steps.semver.outputs.precedence }},
            ghcr.io/${{ steps.reponame.outputs.lowercase }}:${{ steps.semver.outputs.core }},
            ghcr.io/${{ steps.reponame.outputs.lowercase }}:${{ steps.semver.outputs.pair }},
            ghcr.io/${{ steps.reponame.outputs.lowercase }}:${{ steps.semver.outputs.major }},
            ghcr.io/${{ steps.reponame.outputs.lowercase }}:latest
          push: true

      - name: "Create release"
        uses: "ncipollo/release-action@v1.10.0"
        with:
          draft: true
          generateReleaseNotes: true