93 lines
		
	
	
		
			3.4 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			93 lines
		
	
	
		
			3.4 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
/**
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 * @license
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 * Copyright Google Inc. All Rights Reserved.
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 *
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 * Use of this source code is governed by an MIT-style license that can be
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 * found in the LICENSE file at https://angular.io/license
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 */
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// tslint:disable:no-console
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module.exports = (gulp) => async() => {
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  try {
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    const validateCommitMessage = require('../validate-commit-message');
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    const shelljs = require('shelljs');
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    const getRefsAndShasForTarget = require('../utils/get-refs-and-shas-for-target');
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    // Break on error.
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    shelljs.set('-e');
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    let target = {};
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    if (process.env['CI'] === 'true') {
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      // Validation of commit messages on CI
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      if (process.env['CI_PULL_REQUEST'] === 'false') {
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        // Skip commit message validation on CI for non-PR branches as we are not testing new
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        // unreviewed commits.  By enforcing correctness on the incoming changes in the PR
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        // branches, we are able to render this check unnecessary on non-PR branches.
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        console.info(
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            `Since valid commit messages are enforced by PR linting on CI,\n` +
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            `we do not need to validate commit messages on CI runs on upstream branches.\n\n` +
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            `Skipping validate-commit-message check`);
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        process.exit();
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      }
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      target = await getRefsAndShasForTarget(process.env['CI_PULL_REQUEST']);
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    } else {
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      // Validation of commit messages locally
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      const baseRef = 'master';
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      const headRef = shelljs.exec('git symbolic-ref --short HEAD', {silent: true}).trim();
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      const baseSha = shelljs.exec(`git rev-parse origin/master`, {silent: true}).trim();
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      const headSha = shelljs.exec(`git rev-parse HEAD`, {silent: true}).trim();
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      const commonAncestorSha =
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          shelljs.exec(`git merge-base origin/master ${headSha}`, {silent: true}).trim();
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      target = {
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        base: {
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          ref: baseRef,
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          sha: baseSha,
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        },
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        head: {
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          ref: headRef,
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          sha: headSha,
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        },
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        commonAncestorSha: commonAncestorSha,
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        latestShaOfTargetBranch: baseSha,
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        latestShaOfPrBranch: headSha,
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      };
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    }
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    const result = shelljs.exec(
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        `git log --reverse --format=%s ${target.commonAncestorSha}..${target.latestShaOfPrBranch}`,
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        {silent: true});
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    if (result.code) {
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      throw new Error(`Failed to fetch commits: ${result.stderr}`);
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    }
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    const commitsByLine = result.trim().split(/\n/).filter(line => line != '');
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    console.log(`Examining ${commitsByLine.length} commit(s) between ${target.base.ref} and HEAD`);
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    if (commitsByLine.length == 0) {
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      console.log(`There are zero new commits between ${target.base.ref} and HEAD`);
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    }
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    const disallowSquashCommits = true;
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    const isNonFixup = m => !validateCommitMessage.FIXUP_PREFIX_RE.test(m);
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    const someCommitsInvalid = !commitsByLine.every((m, i) => {
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      // `priorNonFixupCommits` is only needed if the current commit is a fixup commit.
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      const priorNonFixupCommits =
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          isNonFixup(m) ? undefined : commitsByLine.slice(0, i).filter(isNonFixup);
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      return validateCommitMessage(m, disallowSquashCommits, priorNonFixupCommits);
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    });
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    if (someCommitsInvalid) {
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      throw new Error(
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          'Please fix the failing commit messages before continuing...\n' +
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          'Commit message guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-guidelines');
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    }
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  } catch (err) {
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    console.error(err);
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    process.exit(1);
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  }
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};
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