From c7d37f74cffb2852f482b909577dcd15681e182b Mon Sep 17 00:00:00 2001
From: Paul Gschwendtner <paulgschwendtner@gmail.com>
Date: Thu, 23 Sep 2021 12:37:57 +0200
Subject: [PATCH] build: expose locales as package export for ES module
 resolution (#43431)

As part of v13, all APF packages use the `exports` field which defines
the public entry-points/mappings for a package. so-called package exports.

The `ng_package` rule creates all the necessary mappings/sub-path exports
for the entry-points of `@angular/common`. Though, since the locale files are
generated separately and are not an actual entry-point, we need to expose these
files publicly so that they can be imported/resolved by consumers.

PR Close #43431
---
 packages/bazel/test/ng_package/common_package.spec.ts | 2 ++
 packages/common/package.json                          | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/packages/bazel/test/ng_package/common_package.spec.ts b/packages/bazel/test/ng_package/common_package.spec.ts
index fbbedd82aa8..36e6b0e1702 100644
--- a/packages/bazel/test/ng_package/common_package.spec.ts
+++ b/packages/bazel/test/ng_package/common_package.spec.ts
@@ -114,6 +114,8 @@ describe('@angular/common ng_package', () => {
             node: './fesm2015/upgrade.mjs',
             default: './fesm2020/upgrade.mjs',
           },
+          './locales/global/*': {default: './locales/global/*.js'},
+          './locales/*': {default: './locales/*.mjs'},
         }
       }));
     });
diff --git a/packages/common/package.json b/packages/common/package.json
index c3b5f1ec34b..f7002b7c5a8 100644
--- a/packages/common/package.json
+++ b/packages/common/package.json
@@ -11,6 +11,14 @@
   "dependencies": {
     "tslib": "^2.3.0"
   },
+  "exports": {
+    "./locales/global/*": {
+      "default": "./locales/global/*.js"
+    },
+    "./locales/*": {
+      "default": "./locales/*.mjs"
+    }
+  },
   "peerDependencies": {
     "@angular/core": "0.0.0-PLACEHOLDER",
     "rxjs": "^6.5.3 || ^7.0.0"