From 4c54ad0aea521d0882af8af63b12050a2c849d8b Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Thu, 19 Sep 2019 11:13:34 -0400
Subject: [PATCH] refactor(@angular-devkit/build-angular): account for disabled
 mangling in downlevel cache

---
 packages/angular_devkit/build_angular/src/browser/index.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/angular_devkit/build_angular/src/browser/index.ts b/packages/angular_devkit/build_angular/src/browser/index.ts
index 84abd3852729..8d987b12d146 100644
--- a/packages/angular_devkit/build_angular/src/browser/index.ts
+++ b/packages/angular_devkit/build_angular/src/browser/index.ts
@@ -65,6 +65,7 @@ import {
   normalizeOptimization,
   normalizeSourceMaps,
 } from '../utils';
+import { manglingDisabled } from '../utils/mangle-options';
 import { CacheKey, ProcessBundleOptions } from '../utils/process-bundle';
 import { assertCompatibleAngularVersion } from '../utils/version';
 import {
@@ -385,7 +386,10 @@ export function buildWebpackBrowser(
                 const codeHash = createHash('sha1')
                   .update(action.code)
                   .digest('hex');
-                const baseCacheKey = `${packageVersion}|${action.code.length}|${codeHash}`;
+                let baseCacheKey = `${packageVersion}|${action.code.length}|${codeHash}`;
+                if (manglingDisabled) {
+                  baseCacheKey += '|MD';
+                }
 
                 // Postfix added to sourcemap cache keys when vendor sourcemaps are present
                 // Allows non-destructive caching of both variants