Check PR Approvals #120
Workflow file for this run
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| name: Check PR Approvals | |
| # For now, the workflow gets triggered only when a review is submitted | |
| # This technically means, a PR with zero approvals can be merged by the rules of this workflow alone | |
| # To protect against that scenario, we can turn on number of approvals required to 2 in the github settings | |
| # of the repository | |
| on: | |
| pull_request_review: | |
| types: [submitted] | |
| workflow_dispatch: | |
| # Without these permissions, we get a 403 error from github | |
| # for trying to modify the pull request for newer project. | |
| # Source: https://stackoverflow.com/a/76994510 | |
| permissions: write-all | |
| jobs: | |
| check-approvals: | |
| if: github.event.review.state == 'APPROVED' || github.event_name == 'workflow_dispatch' | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout repository | |
| uses: actions/checkout@v2 | |
| - name: Install TOML parser | |
| run: npm install @iarna/toml | |
| - name: Check PR Relevance and Approvals | |
| uses: actions/github-script@v6 | |
| with: | |
| script: | | |
| const fs = require('fs'); | |
| const toml = require('@iarna/toml'); | |
| const { owner, repo } = context.repo; | |
| let pull_number; | |
| if (github.event_name === 'workflow_dispatch') { | |
| const branch = github.ref.replace('refs/heads/', ''); | |
| const prs = await github.rest.pulls.list({ | |
| owner, | |
| repo, | |
| head: `${owner}:${branch}`, | |
| state: 'open' | |
| }); | |
| if (prs.data.length === 0) { | |
| console.log('No open PR found for this branch.'); | |
| return; | |
| } | |
| pull_number = prs.data[0].number; | |
| } else { | |
| pull_number = context.issue.number; | |
| } | |
| // Get PR files | |
| const files = await github.rest.pulls.listFiles({ | |
| owner, | |
| repo, | |
| pull_number | |
| }); | |
| const relevantPaths = ['library/', 'doc/src/challenges/']; | |
| const isRelevantPR = files.data.some(file => | |
| relevantPaths.some(path => file.filename.startsWith(path)) | |
| ); | |
| if (!isRelevantPR) { | |
| console.log('PR does not touch relevant paths. Exiting workflow.'); | |
| return; | |
| } | |
| // Get parsed data | |
| try { | |
| const tomlContent = fs.readFileSync('.github/pull_requests.toml', 'utf8'); | |
| console.log('TOML content:', tomlContent); | |
| const tomlData = toml.parse(tomlContent); | |
| console.log('Parsed TOML data:', JSON.stringify(tomlData, null, 2)); | |
| if (!tomlData.committee || !Array.isArray(tomlData.committee.members)) { | |
| throw new Error('committee.members is not an array in the TOML file'); | |
| } | |
| requiredApprovers = tomlData.committee.members; | |
| } catch (error) { | |
| console.error('Error reading or parsing TOML file:', error); | |
| core.setFailed('Failed to read required approvers list'); | |
| return; | |
| } | |
| // Get all reviews | |
| const reviews = await github.rest.pulls.listReviews({ | |
| owner, | |
| repo, | |
| pull_number | |
| }); | |
| // Example: approvers = ["celina", "zyad"] | |
| const approvers = new Set( | |
| reviews.data | |
| .filter(review => review.state === 'APPROVED') | |
| .map(review => review.user.login) | |
| ); | |
| const requiredApprovals = 2; | |
| const currentCountfromCommittee = Array.from(approvers) | |
| .filter(approver => requiredApprovers.includes(approver)) | |
| .length; | |
| // TODO: Improve logging and messaging to the user | |
| console.log('PR Approvers:', Array.from(approvers)); | |
| console.log('Required Approvers:', requiredApprovals); | |
| // Core logic that checks if the approvers are in the committee | |
| const checkName = 'PR Approval Status'; | |
| const conclusion = (approvers.size >= requiredApprovals && currentCountfromCommittee >= 2) ? 'success' : 'failure'; | |
| const output = { | |
| title: checkName, | |
| summary: `PR has ${approvers.size} total approvals and ${requiredApprovals} required approvals.`, | |
| text: `Approvers: ${Array.from(approvers).join(', ')}\nRequired Approvers: ${requiredApprovers.join(', ')}` | |
| }; | |
| // Get PR details | |
| const pr = await github.rest.pulls.get({ | |
| owner, | |
| repo, | |
| pull_number | |
| }); | |
| // Create or update check run | |
| const checkRuns = await github.rest.checks.listForRef({ | |
| owner, | |
| repo, | |
| ref: pr.data.head.sha, | |
| check_name: checkName | |
| }); | |
| // Reuse the same workflow everytime there's a new review submitted | |
| // instead of creating new workflows. Better efficiency and readability | |
| // as the number of workflows is kept to a minimal number | |
| if (checkRuns.data.total_count > 0) { | |
| await github.rest.checks.update({ | |
| owner, | |
| repo, | |
| check_run_id: checkRuns.data.check_runs[0].id, | |
| status: 'completed', | |
| conclusion, | |
| output | |
| }); | |
| } else { | |
| await github.rest.checks.create({ | |
| owner, | |
| repo, | |
| name: checkName, | |
| head_sha: pr.data.head.sha, | |
| status: 'completed', | |
| conclusion, | |
| output | |
| }); | |
| } | |
| if (conclusion === 'failure') { | |
| core.setFailed(`PR needs at least ${requiredApprovals} total approvals and 2 required approvals. Current approvals: ${approvers.size}, Required approvals: ${requiredApprovals}`); | |
| } |