pr-preview-publish.yml

name: Publish CA PR preview

on:
  workflow_run:
    workflows: [Build CA PR preview]
    types: [completed]

permissions:
  actions: read
  contents: write
  issues: write

concurrency:
  group: ca-pr-preview-publish

jobs:
  publish:
    if: >-
      github.event.workflow_run.conclusion == 'success' &&
      github.event.workflow_run.event == 'pull_request'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
        with:
          ref: pr-previews
      - uses: actions/download-artifact@v8
        with:
          name: ca-pr-preview
          path: artifact
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}
      - name: Publish stable PR installer URL
        id: publish
        env:
          HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
        run: |
          PR_NUMBER="$(jq -r '.pr' artifact/preview.json)"
          ARTIFACT_SHA="$(jq -r '.sha' artifact/preview.json)"
          [[ "$PR_NUMBER" =~ ^[0-9]+$ ]]
          test "$ARTIFACT_SHA" = "$HEAD_SHA"
          echo "pr_number=$PR_NUMBER" >> "$GITHUB_OUTPUT"
          rm -rf "pr/$PR_NUMBER"
          mkdir -p "pr/$PR_NUMBER"
          cp artifact/* "pr/$PR_NUMBER/"
          git config user.name github-actions[bot]
          git config user.email 41898282+github-actions[bot]@users.noreply.github.com
          git add "pr/$PR_NUMBER"
          git diff --cached --quiet && exit 0
          git commit -m "preview: publish PR #$PR_NUMBER at ${HEAD_SHA:0:7}"
          git push origin pr-previews
      - name: Add installer link to pull request
        uses: actions/github-script@v9
        env:
          PR_NUMBER: ${{ steps.publish.outputs.pr_number }}
        with:
          script: |
            const issueNumber = Number(process.env.PR_NUMBER)
            if (!Number.isInteger(issueNumber) || issueNumber < 1) {
              throw new Error(`Invalid pull request number: ${process.env.PR_NUMBER}`)
            }

            const marker = '<!-- ca-pr-preview -->'
            const installerUrl = `https://raw.githubusercontent.com/${context.repo.owner}/${context.repo.repo}/pr-previews/pr/${issueNumber}/community.applications.plg`
            const body = `${marker}
            ### Community Applications preview

            Install this PR build on a test server:

            \`${installerUrl}\`

            This is an unreleased test build. The same URL updates when new commits are pushed to this pull request.`

            const comments = await github.paginate(github.rest.issues.listComments, {
              ...context.repo,
              issue_number: issueNumber,
              per_page: 100
            })
            const existing = comments.find(comment =>
              comment.user?.type === 'Bot' && comment.body?.includes(marker)
            )

            if (existing) {
              await github.rest.issues.updateComment({
                ...context.repo,
                comment_id: existing.id,
                body
              })
            } else {
              await github.rest.issues.createComment({
                ...context.repo,
                issue_number: issueNumber,
                body
              })
            }