[pull] master from prebid:master #16
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name: Check for linter warnings / exceptions | |
on: | |
pull_request_target: | |
branches: | |
- master | |
jobs: | |
check-linter: | |
runs-on: ubuntu-latest | |
steps: | |
- name: Set up Node.js | |
uses: actions/setup-node@v4 | |
with: | |
node-version: '20' | |
- name: Checkout code | |
uses: actions/checkout@v4 | |
with: | |
fetch-depth: 0 | |
ref: ${{ github.event.pull_request.base.sha }} | |
- name: Fetch base and target branches | |
run: | | |
git fetch origin +refs/heads/${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }} | |
git fetch origin +refs/pull/${{ github.event.pull_request.number }}/merge:refs/remotes/pull/${{ github.event.pull_request.number }}/merge | |
- name: Install dependencies | |
run: npm ci | |
- name: Get the diff | |
run: git diff --name-only origin/${{ github.event.pull_request.base.ref }}...refs/remotes/pull/${{ github.event.pull_request.number }}/merge | grep '^\(modules\|src\|libraries\|creative\)/.*\.js$' > __changed_files.txt || true | |
- name: Run linter on base branch | |
run: npx eslint --no-inline-config --format json $(cat __changed_files.txt | xargs stat --printf '%n\n' 2> /dev/null) > __base.json || true | |
- name: Check out PR | |
run: git checkout ${{ github.event.pull_request.head.sha }} | |
- name: Run linter on PR | |
run: npx eslint --no-inline-config --format json $(cat __changed_files.txt | xargs stat --printf '%n\n' 2> /dev/null) > __pr.json || true | |
- name: Compare them and post comment if necessary | |
uses: actions/github-script@v7 | |
with: | |
script: | | |
const fs = require('fs'); | |
const path = require('path'); | |
const process = require('process'); | |
function parse(fn) { | |
return JSON.parse(fs.readFileSync(fn)).reduce((memo, data) => { | |
const file = path.relative(process.cwd(), data.filePath); | |
if (!memo.hasOwnProperty(file)) { memo[file] = { errors: 0, warnings: 0} } | |
data.messages.forEach(({severity}) => { | |
memo[file][severity > 1 ? 'errors' : 'warnings']++; | |
}); | |
return memo; | |
}, {}) | |
} | |
function mkDiff(old, new_) { | |
const files = Object.fromEntries( | |
Object.entries(new_) | |
.map(([file, {errors, warnings}]) => { | |
const {errors: oldErrors, warnings: oldWarnings} = old[file] || {}; | |
return [file, {errors: Math.max(0, errors - (oldErrors ?? 0)), warnings: Math.max(0, warnings - (oldWarnings ?? 0))}] | |
}) | |
.filter(([_, {errors, warnings}]) => errors > 0 || warnings > 0) | |
) | |
return Object.values(files).reduce((memo, {warnings, errors}) => { | |
memo.errors += errors; | |
memo.warnings += warnings; | |
return memo; | |
}, {errors: 0, warnings: 0, files}) | |
} | |
function mkComment({errors, warnings, files}) { | |
function pl(noun, number) { | |
return noun + (number === 1 ? '' : 's') | |
} | |
if (errors === 0 && warnings === 0) return; | |
const summary = []; | |
if (errors) summary.push(`**${errors}** linter ${pl('error', errors)}`) | |
if (warnings) summary.push(`**${warnings}** linter ${pl('warning', warnings)}`) | |
let cm = `Tread carefully! This PR adds ${summary.join(' and ')} (possibly disabled through directives):\n\n`; | |
Object.entries(files).forEach(([file, {errors, warnings}]) => { | |
const summary = []; | |
if (errors) summary.push(`+${errors} ${pl('error', errors)}`); | |
if (warnings) summary.push(`+${warnings} ${pl('warning', warnings)}`) | |
cm += ` * \`${file}\` (${summary.join(', ')})\n` | |
}) | |
return cm; | |
} | |
const [base, pr] = ['__base.json', '__pr.json'].map(parse); | |
const comment = mkComment(mkDiff(base, pr)); | |
if (comment) { | |
github.rest.issues.createComment({ | |
owner: context.repo.owner, | |
repo: context.repo.repo, | |
issue_number: context.issue.number, | |
body: comment | |
}); | |
} |