build: update release configuration to use new release notes system (#41905)

Update the ng-dev config for release to use the new release notes system
for generating release notes.

PR Close #41905

.ng-dev/release.ts

@@ -1,5 +1,4 @@
 import {join} from 'path';
-import {exec} from 'shelljs';
 import {ReleaseConfig} from '../dev-infra/release/config';
 
 /** Configuration for the `ng-dev release` command. */
@@ -29,9 +28,8 @@ export const release: ReleaseConfig = {
     const {buildTargetPackages} = require(join(__dirname, '../scripts/build/package-builder'));
     return buildTargetPackages('dist/release-output', false, 'Release', true);
   },
-  // TODO: This can be removed once there is an org-wide tool for changelog generation.
-  generateReleaseNotesForHead: async () => {
-    exec('yarn -s gulp changelog', {cwd: join(__dirname, '../')});
+  releaseNotes: {
+    hiddenScopes: ['aio', 'dev-infra', 'docs-infra', 'zone.js'],
   },
   releasePrLabels: ['comp: build & ci', 'action: merge', 'PullApprove: disable'],
 };

gulpfile.js

@@ -19,7 +19,6 @@ function loadTask(fileName, taskName) {
 
 
 gulp.task('source-map-test', loadTask('source-map-test'));
-gulp.task('changelog', loadTask('changelog'));
 gulp.task('changelog:zonejs', loadTask('changelog-zonejs'));
 gulp.task('cldr:extract', loadTask('cldr', 'extract'));
 gulp.task('cldr:download', loadTask('cldr', 'download'));

tools/gulp-tasks/changelog.js

@@ -1,73 +0,0 @@
-/**
- * @license
- * Copyright Google LLC All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-const {readFileSync} = require('fs');
-const {bold, yellow} = require('chalk');
-
-module.exports = (gulp) => () => {
-  const conventionalChangelog = require('gulp-conventional-changelog');
-  const ignoredScopes = [
-    'aio',
-    'dev-infra',
-    'docs-infra',
-    'zone.js',
-  ];
-
-  return gulp.src('CHANGELOG.md')
-      .pipe(conventionalChangelog(
-          /* core options */ {preset: 'angular'},
-          /* context options */ {},
-          /* raw-commit options */ {
-            // Ignore commits that start with `<type>(<scope>)` for any of the ignored scopes.
-            extendedRegexp: true,
-            grep: `^[^(]+\\((${ignoredScopes.join('|')})\\)`,
-            invertGrep: true,
-          },
-          /* commit parser options */ null,
-          /* writer options*/ createDedupeWriterOptions()))
-      .pipe(gulp.dest('./'));
-};
-
-/**
- * Creates changelog writer options which ensure that commits are not showing up multiple times.
- * Commits can show up multiple times if a changelog has been generated on a publish branch
- * and has been cherry-picked into "master". In that case, the changelog will already contain
- * commits from master which might be added to the changelog again. This is because usually
- * patch and minor releases are tagged from the publish branches and therefore
- * conventional-changelog tries to build the changelog from last minor version to HEAD when a
- * new minor version is being published from the "master" branch. We naively match commit
- * headers as otherwise we would need to query Git and diff commits between a given patch branch.
- * The commit header is reliable enough as it contains a direct reference to the source PR.
- */
-function createDedupeWriterOptions() {
-  const existingChangelogContent = readFileSync('CHANGELOG.md', 'utf8');
-
-  return {
-    // Specify a writer option that can be used to modify the content of a new changelog section.
-    // See: conventional-changelog/tree/master/packages/conventional-changelog-writer
-    finalizeContext: (context) => {
-      context.commitGroups = context.commitGroups.filter((group) => {
-        group.commits = group.commits.filter((commit) => {
-          // NOTE: We cannot compare the SHAs because the commits will have a different SHA
-          // if they are being cherry-picked into a different branch.
-          if (existingChangelogContent.includes(commit.subject)) {
-            console.info(yellow(`  ↺   Skipping duplicate: "${bold(commit.header)}"`));
-            return false;
-          }
-          return true;
-        });
-
-        // Filter out commit groups which don't have any commits. Commit groups will become
-        // empty if we filter out all duplicated commits.
-        return group.commits.length !== 0;
-      });
-
-      return context;
-    }
-  };
-}