SpecSync/.github/workflows/lean4-ci.yml at main · SentinelOps-CI/SpecSync · GitHub

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name: Lean4 specs

on:
  pull_request:
    paths:
      - "specs/**"
      - "lakefile.lean"
      - "lean-toolchain"
      - ".github/workflows/lean4-ci.yml"
  push:
    branches: [main, master]
    paths:
      - "specs/**"
      - "lakefile.lean"
      - "lean-toolchain"

jobs:
  lean4-specs:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Build specs (lake via lean-action)
        uses: leanprover/lean-action@v1
        with:
          auto-config: "true"
          test: "false"

      - name: Comment on PR with build summary
        if: github.event_name == 'pull_request' && success()
        uses: actions/github-script@v7
        with:
          script: |
            const body = [
              '## Lean4 build',
              '',
              '`lake build` completed successfully for this change.',
              '',
              `Workflow: ${context.workflow} run [\`${context.runId}\`](${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId})`
            ].join('\n');
            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            });
            const marker = '<!-- specsync-lean4-ci -->';
            const existing = comments.find(c => c.body && c.body.includes(marker));
            const fullBody = marker + '\n' + body;
            if (existing) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: existing.id,
                body: fullBody
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: fullBody
              });
            }