# fly-deploy will be triggered on completion of this workflow to actually deploy the code to fly.io.

name: fly.io Build
on:
  pull_request:
    branches: [ main ]
    types: [labeled, opened, synchronize, reopened]

  # Allows running this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  build:
    name: Build Docker image
    runs-on: ubuntu-latest
    # Build when the 'preview' label is added, or when PR is updated with this label present.
    if: >
      github.event_name == 'workflow_dispatch' ||
      (github.event_name == 'pull_request' &&
      contains(github.event.pull_request.labels.*.name, 'preview'))
    steps:
      - uses: actions/checkout@v4
      - name: Build and export Docker image
        id: docker-build
        run: >
          ./buildtools/checkout-ext-directory.sh grist-ee &&
          docker build -t grist-core:preview . --build-context ext=ext &&
          docker image save grist-core:preview -o grist-core.tar
      - name: Save PR information
        run: |
          echo PR_NUMBER=${{ github.event.number }} >> ./pr-info.txt
          echo PR_SOURCE=${{ github.event.pull_request.head.repo.full_name }}-${{ github.event.pull_request.head.ref }} >> ./pr-info.txt
          echo PR_SHASUM=${{ github.event.pull_request.head.sha }} >> ./pr-info.txt
        # PR_SOURCE looks like <owner>/<repo>-<branch>.
        # For example, if the GitHub user "foo" forked grist-core as "grist-bar", and makes a PR from their branch named "baz",
        # it will be "foo/grist-bar-baz". deploy.js later replaces "/" with "-", making it "foo-grist-bar-baz".
      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: docker-image
          path: |
            ./grist-core.tar
            ./pr-info.txt
          if-no-files-found: "error"