main.yml

name: Main

on:
  push:
    branches: ["main"]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: write # Write is required to create/update releases
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Generate version based on date
        run: echo "RELEASE_VERSION=$(date '+%Y-%m-%d_%H_%M')" >> $GITHUB_ENV

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.RELEASE_VERSION }}
          build-args: |
            APP_VERSION=${{ env.RELEASE_VERSION }}

      - name: Create tag
        uses: rickstaa/action-create-tag@v1
        id: "tag_create"
        with:
          tag: ${{ env.RELEASE_VERSION }}

      - name: Upsert pending release
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo;
            /* 
             * We should only need to load 2 releases, as either both will be latest, or one will be latest and
             * the other will be pending. We're loading a few extras here in case we get into a weird state.
             */
            const PAGE_SIZE = 5;
            const releases = await github.rest.repos.listReleases({ owner, repo });

            const pendingReleases = releases.data.filter(release => release.prerelease);
            if (pendingReleases.length > 1) {
              throw new Error(`Found more than one pending release: ${pendingReleases.map(release => release.tag_name).join(', ')}`);
            }

            const latestRelease = releases.data.find(release => !release.prerelease);
            if (!latestRelease) {
              throw new Error('No latest release found');
            }

            if (pendingReleases.length === 1) {
              console.log(`Found existing pending release: ${pendingReleases[0].tag_name}, replacing it`);
              await github.rest.repos.deleteRelease({ owner, repo, release_id: pendingReleases[0].id });
            }

            console.log('No pending release found, creating one');
            const newRelease = await github.rest.repos.createRelease({
              owner,
              repo,
              prerelease: true,
              tag_name: "${{ env.RELEASE_VERSION }}",
              name: "${{ env.RELEASE_VERSION }}",
              generate_release_notes: true,
            });
            console.log(`Created pending release: ${newRelease.data.html_url}`);