From d405bd641ddbdc7ac71faf257f72670c6aa3e530 Mon Sep 17 00:00:00 2001
From: Paul Gschwendtner <paulgschwendtner@gmail.com>
Date: Wed, 18 Mar 2020 16:41:00 +0100
Subject: [PATCH] build: create merge script config for components repo

Adds a merge script config for the components repo.
Additionally, wires up a shorthand Yarn script for merging PRs
---
 merge-config.js | 41 +++++++++++++++++++++++++++++++++++++++++
 package.json    |  3 ++-
 2 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 merge-config.js

diff --git a/merge-config.js b/merge-config.js
new file mode 100644
index 000000000000..90ec69dc9ef8
--- /dev/null
+++ b/merge-config.js
@@ -0,0 +1,41 @@
+module.exports = () => {
+  const {major, minor} = parseVersion(require('./package').version);
+  const patchBranch = `${major}.${minor}.x`;
+  const minorBranch = `${major}.x`;
+
+  return {
+    projectRoot: __dirname,
+    repository: {
+      user: 'angular',
+      name: 'components',
+    },
+    claSignedLabel: 'cla: yes',
+    mergeReadyLabel: 'merge ready',
+    labels: [
+      {
+        pattern: 'target: patch',
+        branches: ['master', patchBranch],
+      },
+      {
+        pattern: 'target: minor',
+        branches: ['master', minorBranch],
+      },
+      {
+        pattern: 'target: major',
+        branches: ['master'],
+      },
+      {
+        pattern: 'target: development-branch',
+        // Merge PRs with the given label only into the target branch that has
+        // been specified through the Github UI.
+        branches: (target) => [target],
+      }
+    ],
+  }
+};
+
+/** Converts a version string into an object. */
+function parseVersion(version) {
+  const [major = 0, minor = 0, patch = 0] = version.split('.').map(segment => parseInt(segment));
+  return {major, minor, patch};
+}
diff --git a/package.json b/package.json
index 154eb33bd7ce..3d3d6d073507 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,8 @@
     "ownerslint": "ts-node --project scripts/ scripts/ownerslint.ts",
     "tslint": "tslint -c tslint.json --project ./tsconfig.json",
     "stylelint": "stylelint \"src/**/*.+(css|scss)\" --config .stylelintrc.json --syntax scss",
-    "resync-caretaker-app": "ts-node --project scripts scripts/caretaking/resync-caretaker-app-prs.ts"
+    "resync-caretaker-app": "ts-node --project scripts scripts/caretaking/resync-caretaker-app-prs.ts",
+    "merge": "ts-node --project scripts scripts/merge-script/cli.ts --config ./merge-config.js"
   },
   "version": "9.1.3",
   "dependencies": {