angular-cn/tools/gulp-tasks/validate-commit-message.js

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module.exports = (gulp) => () => {
const validateCommitMessage = require('../validate-commit-message');
const childProcess = require('child_process');
// We need to fetch origin explicitly because it might be stale.
// I couldn't find a reliable way to do this without fetch.
childProcess.exec(
'git fetch origin master && git log --reverse --format=%s HEAD ^origin/master',
(error, stdout, stderr) => {
if (error) {
console.log(stderr);
process.exit(1);
}
let someCommitsInvalid = false;
let commitsByLine = stdout.trim().split(/\n/);
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for (var i = 0; i < commitsByLine.length; i++) {
if (!commitsByLine[i]) {
commitsByLine.splice(i, 1);
}
}
console.log(`Examining ${commitsByLine.length} commits between HEAD and master`);
if (commitsByLine.length == 0) {
console.log('There are zero new commits between this HEAD and master');
}
someCommitsInvalid = !commitsByLine.every(validateCommitMessage);
if (someCommitsInvalid) {
console.log('Please fix the failing commit messages before continuing...');
console.log(
'Commit message guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-guidelines');
process.exit(1);
}
});
};