From 9bbb6ed3e6892a4d50af71bea59986544c4e08c5 Mon Sep 17 00:00:00 2001
From: Sachin Grover <sacgrover@gmail.com>
Date: Wed, 26 Feb 2020 23:31:50 +0530
Subject: [PATCH] fix(@angular-devkit/build-angular): allow function in
 filename while changing the name of compiling chunks

Fixes angular#17087

(cherry picked from commit 14dc4fb818815884d06896b5b5f5a219b64ef366)
---
 .../src/angular-cli-files/models/webpack-configs/common.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts b/packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts
index 0d6ee7723cc6..5815f6f916d3 100644
--- a/packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts
+++ b/packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts
@@ -149,12 +149,13 @@ export function getCommonConfig(wco: WebpackConfigOptions): Configuration {
                 // tslint:disable-next-line: no-any
                 (compilation.mainTemplate.hooks as any).assetPath.tap(
                   'build-angular',
-                  (filename: string, data: ChunkData) => {
-                    const isMap = filename && filename.endsWith('.map');
+                (filename: string | ((data: ChunkData) => string), data: ChunkData) => {
+                    const assetName = typeof filename === 'function' ? filename(data) : filename;
+                    const isMap = assetName && assetName.endsWith('.map');
 
                     return data.chunk && data.chunk.name === 'polyfills-es5'
                       ? `polyfills-es5${hashFormat.chunk}.js${isMap ? '.map' : ''}`
-                      : filename;
+                      : assetName;
                   },
                 );
               });