From 5d7b229963b6949f592d4c3ffbefbcb09919485c Mon Sep 17 00:00:00 2001
From: Nico Jansen <jansennico@gmail.com>
Date: Tue, 22 Nov 2022 21:48:53 +0100
Subject: [PATCH] feat(@angular-devkit/build-angular): expose built-in karma
 config

Expose build in karma config to anyone that wants to use it.

For example:

```js
// karma.conf.js
const setDefaultConfig = require('@angular-devkit/build-angular/src/builders/karma/karma.conf.js');
module.exports = function(config) {
  setDefaultConfig(config);
  config.set({
    // my own custom overrides
  });
}
```
---
 .../build_angular/src/builders/karma/index.ts    | 16 ++++++++++------
 .../src/builders/karma/karma.conf.ts             | 14 ++++++++++++++
 2 files changed, 24 insertions(+), 6 deletions(-)
 create mode 100644 packages/angular_devkit/build_angular/src/builders/karma/karma.conf.ts

diff --git a/packages/angular_devkit/build_angular/src/builders/karma/index.ts b/packages/angular_devkit/build_angular/src/builders/karma/index.ts
index 50da6fe0f24c..57bce6498fcf 100644
--- a/packages/angular_devkit/build_angular/src/builders/karma/index.ts
+++ b/packages/angular_devkit/build_angular/src/builders/karma/index.ts
@@ -96,7 +96,7 @@ export function execute(
 
       const karmaOptions: KarmaConfigOptions = options.karmaConfig
         ? {}
-        : getBuiltInKarmaConfig(karma, context.workspaceRoot, projectName);
+        : getBuiltInKarmaConfig(karma, context.workspaceRoot, getCoverageFolderName(projectName));
 
       karmaOptions.singleRun = singleRun;
 
@@ -183,16 +183,20 @@ export function execute(
   );
 }
 
-function getBuiltInKarmaConfig(
-  karma: typeof import('karma'),
-  workspaceRoot: string,
-  projectName: string,
-): ConfigOptions & Record<string, unknown> {
+function getCoverageFolderName(projectName: string) {
   let coverageFolderName = projectName.charAt(0) === '@' ? projectName.slice(1) : projectName;
   if (/[A-Z]/.test(coverageFolderName)) {
     coverageFolderName = strings.dasherize(coverageFolderName);
   }
 
+  return coverageFolderName;
+}
+
+export function getBuiltInKarmaConfig(
+  karma: typeof import('karma'),
+  workspaceRoot: string,
+  coverageFolderName: string,
+): ConfigOptions & Record<string, unknown> {
   const workspaceRootRequire = createRequire(workspaceRoot + '/');
 
   return {
diff --git a/packages/angular_devkit/build_angular/src/builders/karma/karma.conf.ts b/packages/angular_devkit/build_angular/src/builders/karma/karma.conf.ts
new file mode 100644
index 000000000000..5a07811fc3cf
--- /dev/null
+++ b/packages/angular_devkit/build_angular/src/builders/karma/karma.conf.ts
@@ -0,0 +1,14 @@
+/**
+ * @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
+ */
+
+import karma from 'karma';
+import { getBuiltInKarmaConfig } from '.';
+
+module.exports = function (config: karma.Config) {
+  config.set(getBuiltInKarmaConfig(karma, process.cwd(), ''));
+};