pr-comment-build-cli.yml

# This workflow is triggered by a comment on PR with the text ".build-cli"
#
# SECURITY: This workflow checks out and builds code from PRs. To prevent
# malicious code execution (GHSA-4h72-4h3w-4587, GHSA-mqm8-hhf6-wvjq),
# we verify the commenter has write access before proceeding.
on:
  issue_comment:
    types: [created]
  workflow_dispatch:
    inputs:
      pr_number:
        description: 'PR number to comment on'
        required: true
        type: string

# permissions needed for reacting to IssueOps commands on PRs
permissions:
  pull-requests: write
  checks: read

name: Build CLI

concurrency:
  group: ${{ github.workflow }}-${{ (github.event.issue && github.event.issue.number) || github.event.inputs.pr_number }}
  cancel-in-progress: true

jobs:
  trigger-on-command:
    if: >
      github.event_name == 'workflow_dispatch' ||
      (github.event.issue.pull_request && contains(github.event.comment.body, '.build-cli'))
    name: Trigger on ".build-cli" PR comment
    runs-on: ubuntu-latest
    outputs:
      continue: ${{ steps.security_check.outputs.authorized }}
      pr_number: ${{ steps.command.outputs.issue_number || github.event.inputs.pr_number }}
      head_sha: ${{ steps.set_head_sha.outputs.head_sha || github.sha }}
    steps:
      # SECURITY: Verify commenter has write access BEFORE any checkout
      # This prevents attackers from triggering builds on their own malicious PRs
      - name: Verify commenter permissions
        id: security_check
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd  # v8
        with:
          script: |
            // workflow_dispatch requires repo write access, so it's inherently safe
            if (context.eventName === 'workflow_dispatch') {
              core.setOutput('authorized', 'true');
              console.log('✅ workflow_dispatch - authorized');
              return;
            }
            
            const commenter = context.payload.comment.user.login;
            console.log(`Checking permissions for: ${commenter}`);
            
            try {
              const { data: permission } = await github.rest.repos.getCollaboratorPermissionLevel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                username: commenter
              });
              
              const allowed = ['admin', 'maintain', 'write'].includes(permission.permission);
              console.log(`Permission level: ${permission.permission}, Authorized: ${allowed}`);
              
              if (!allowed) {
                // Post a comment explaining the rejection
                await github.rest.issues.createComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.payload.issue.number,
                  body: `⚠️ @${commenter} Only repository collaborators with write access can trigger builds.`
                });
                core.setOutput('authorized', 'false');
              } else {
                core.setOutput('authorized', 'true');
              }
            } catch (error) {
              console.log(`Permission check failed: ${error.message}`);
              core.setOutput('authorized', 'false');
            }

      - name: Run command action
        if: steps.security_check.outputs.authorized == 'true'
        uses: github/command@v2.0.3
        id: command
        with:
          command: ".build-cli"
          skip_reviews: true
          reaction: "eyes"
          allowed_contexts: pull_request

      - name: Checkout code
        if: steps.security_check.outputs.authorized == 'true'
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8  # v6.0.1
        
      - name: Get PR head SHA with gh
        id: set_head_sha
        if: steps.security_check.outputs.authorized == 'true'
        run: |
          echo "Get PR head SHA with gh"
          HEAD_SHA=$(gh pr view "$ISSUE_NUMBER" --json headRefOid -q .headRefOid)
          echo "head_sha=$HEAD_SHA" >> $GITHUB_OUTPUT
          echo "head_sha=$HEAD_SHA"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          ISSUE_NUMBER: ${{ steps.command.outputs.issue_number }}

  build-cli:
    needs: [trigger-on-command]
    if: ${{ needs.trigger-on-command.outputs.continue == 'true' }}
    uses: ./.github/workflows/build-cli.yml
    with:
      ref: ${{ needs.trigger-on-command.outputs.head_sha }}

  pr-comment-cli:
    name: PR Comment with CLI builds
    runs-on: ubuntu-latest
    needs: [trigger-on-command, build-cli]
    permissions:
      pull-requests: write

    steps:
      - name: Download CLI artifacts
        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131  # v7.0.0
        with:
          pattern: goose-*
          path: cli-dist
          merge-multiple: true

      - name: Comment on PR with CLI download links
        uses: peter-evans/create-or-update-comment@v5
        with:
          issue-number: ${{ needs.trigger-on-command.outputs.pr_number }}
          body: |
            ### CLI Builds

            Download CLI builds for different platforms:
            - [📦 Linux (x86_64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/goose-x86_64-unknown-linux-gnu.zip)
            - [📦 Linux (aarch64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/goose-aarch64-unknown-linux-gnu.zip)
            - [📦 macOS (x86_64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/goose-x86_64-apple-darwin.zip)
            - [📦 macOS (aarch64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/goose-aarch64-apple-darwin.zip)
            - [📦 Windows (x86_64)](https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}/goose-x86_64-pc-windows-gnu.zip)

            These links are provided by nightly.link and will work even if you're not logged into GitHub.