From 158269cb94671f2314f9356118dd014addfba029 Mon Sep 17 00:00:00 2001
From: Joey Perrott <josephperrott@gmail.com>
Date: Tue, 19 Jan 2021 12:37:12 -0800
Subject: [PATCH] feat(dev-infra): automatically add labels to release PRs
 (#40016)

Automatically add provided labels to PRs created for release.

PR Close #40016
---
 .ng-dev/release.ts                   | 2 --
 dev-infra/ng-dev.js                  | 4 ++++
 dev-infra/release/config/index.ts    | 2 ++
 dev-infra/release/publish/actions.ts | 9 +++++++++
 4 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/.ng-dev/release.ts b/.ng-dev/release.ts
index d896fc9adb..8177c3c3e1 100644
--- a/.ng-dev/release.ts
+++ b/.ng-dev/release.ts
@@ -32,7 +32,5 @@ export const release: ReleaseConfig = {
   generateReleaseNotesForHead: async () => {
     exec('yarn -s gulp changelog', {cwd: join(__dirname, '../')});
   },
-  // The `comp: *` labels will be automatically added by PullApprove and the targeting label will
-  // be added by the release tooling, only `action: merge` must be manually included to the list.
   releasePrLabels: ['comp: build & ci', 'action: merge', 'PullApprove: disable'],
 };
diff --git a/dev-infra/ng-dev.js b/dev-infra/ng-dev.js
index 80451d2834..eb699a79bb 100755
--- a/dev-infra/ng-dev.js
+++ b/dev-infra/ng-dev.js
@@ -5676,6 +5676,10 @@ class ReleaseAction {
             const { fork, branchName } = yield this._pushHeadToFork(proposedForkBranchName, true);
             const { data } = yield this.git.github.pulls.create(Object.assign(Object.assign({}, this.git.remoteParams), { head: `${fork.owner}:${branchName}`, base: targetBranch, body,
                 title }));
+            // Add labels to the newly created PR if provided in the configuration.
+            if (this.config.releasePrLabels !== undefined) {
+                yield this.git.github.issues.addLabels(Object.assign(Object.assign({}, this.git.remoteParams), { issue_number: data.number, labels: this.config.releasePrLabels }));
+            }
             info(green(`  ✓   Created pull request #${data.number} in ${repoSlug}.`));
             return {
                 id: data.number,
diff --git a/dev-infra/release/config/index.ts b/dev-infra/release/config/index.ts
index da1f759116..e8fb95909a 100644
--- a/dev-infra/release/config/index.ts
+++ b/dev-infra/release/config/index.ts
@@ -34,6 +34,8 @@ export interface ReleaseConfig {
    */
   // TODO: Remove this in favor of a canonical changelog format across the Angular organization.
   extractReleaseNotesPattern?: (version: semver.SemVer) => RegExp;
+  /** The list of github labels to add to the release PRs. */
+  releasePrLabels?: string[];
 }
 
 /** Configuration for releases in the dev-infra configuration. */
diff --git a/dev-infra/release/publish/actions.ts b/dev-infra/release/publish/actions.ts
index 3b22e81feb..fd55d6543b 100644
--- a/dev-infra/release/publish/actions.ts
+++ b/dev-infra/release/publish/actions.ts
@@ -282,6 +282,15 @@ export abstract class ReleaseAction {
       title,
     });
 
+    // Add labels to the newly created PR if provided in the configuration.
+    if (this.config.releasePrLabels !== undefined) {
+      await this.git.github.issues.addLabels({
+        ...this.git.remoteParams,
+        issue_number: data.number,
+        labels: this.config.releasePrLabels,
+      });
+    }
+
     info(green(`  ✓   Created pull request #${data.number} in ${repoSlug}.`));
     return {
       id: data.number,