pr-binaries.yml

name: PR Binaries

on:
  workflow_dispatch:

# Prevent multiple runs on the same branch
concurrency:
  group: pr-binaries-${{ github.ref }}
  cancel-in-progress: true

jobs:
  detect-pr:
    runs-on: ubuntu-latest
    outputs:
      pr_number: ${{ steps.find_pr.outputs.pr_number }}
    steps:
      - name: Find PR for this branch
        id: find_pr
        uses: actions/github-script@v7
        with:
          script: |
            const branch = context.ref.replace('refs/heads/', '');

            const { data: pulls } = await github.rest.pulls.list({
              owner: context.repo.owner,
              repo: context.repo.repo,
              head: `${context.repo.owner}:${branch}`,
              state: 'open'
            });

            if (pulls.length === 0) {
              core.setFailed(`No open PR found for branch: ${branch}`);
              return;
            }

            const prNumber = pulls[0].number;
            core.setOutput('pr_number', prNumber);
            core.info(`Found PR #${prNumber} for branch ${branch}`);

  setup:
    needs: [detect-pr]
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.latest_version.outputs.version }}
    env:
      PR_NUMBER: ${{ needs.detect-pr.outputs.pr_number }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set build numbers
        run: |
          LAST_TAG=$(git tag --sort=-version:refname | head -1)
          echo "DRIFT_BUILD=$(git rev-list --count $LAST_TAG..HEAD)" >> $GITHUB_ENV
          echo "DRIFT_COMMIT=$(git rev-parse --short HEAD)" >> $GITHUB_ENV

      - name: Build prerelease version
        uses: miniscruff/changie-action@v2
        with:
          args: batch auto --prerelease dev.${{ env.DRIFT_BUILD }}.${{ env.DRIFT_COMMIT }}.pr${{ env.PR_NUMBER }}

      - name: Merge changes
        uses: miniscruff/changie-action@v2
        with:
          args: merge

      - name: Get latest version
        id: changie_latest
        uses: miniscruff/changie-action@v2
        with:
          args: latest --remove-prefix

      - name: Export version
        id: latest_version
        run: |
          echo "version=${{ steps.changie_latest.outputs.output }}" >> $GITHUB_OUTPUT

  build:
    needs: [detect-pr, setup]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        platform:
          - x86_64-linux-musl
          - aarch64-linux-musl
          - aarch64-apple-darwin
    env:
      PR_NUMBER: ${{ needs.detect-pr.outputs.pr_number }}
    steps:
      - uses: actions/checkout@v4
      - name: patch shard.yml version
        env:
          DRIFT_VERSION: ${{ needs.setup.outputs.version }}
        run: |
          sed -i "s/^version: .*/version: $DRIFT_VERSION/" shard.yml

      - uses: docker://ghcr.io/luislavena/hydrofoil-crystal:1.16
        with:
          args: sh -c "shards check || shards install --skip-postinstall --skip-executables"

      - name: Build for ${{ matrix.platform }}
        uses: docker://ghcr.io/luislavena/crystal-xbuild:tip
        with:
          entrypoint: xbuild
          args: src/cli.cr drift ${{ matrix.platform }}

      - name: Create tarball
        run: |
          tar -czf drift-pr-${{ env.PR_NUMBER }}-${{ matrix.platform }}.tar.gz -C build/${{ matrix.platform }} drift

      - name: Upload tarball artifact
        uses: actions/upload-artifact@v4
        with:
          name: pr-binary-${{ matrix.platform }}
          path: |
            drift-pr-${{ env.PR_NUMBER }}-${{ matrix.platform }}.tar.gz

  comment:
    needs: [detect-pr, build]
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    env:
      PR_NUMBER: ${{ needs.detect-pr.outputs.pr_number }}
    steps:
      - name: Post PR comment
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = process.env.PR_NUMBER;
            const runId = context.runId;
            const sha = context.sha.substring(0, 7);
            const actor = context.actor;
            const runUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${runId}`;

            const platforms = [
              'x86_64-linux-musl',
              'aarch64-linux-musl',
              'aarch64-apple-darwin'
            ];

            const downloadLinks = platforms.map(platform => {
              const artifactUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${runId}`;
              return `- [${platform}](${artifactUrl}) - \`drift-pr-${prNumber}-${platform}.tar.gz\``;
            }).join('\n');

            const comment = `## Preview Binaries - Build #${context.runNumber}

            Built from commit \`${sha}\` by @${actor}

            **Downloads:**
            ${downloadLinks}

            **Note:** These artifacts will expire in 90 days. [View build logs](${runUrl})`;

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              body: comment
            });