From e220a800939bea1bf248060245ad4cfe293dd400 Mon Sep 17 00:00:00 2001
From: Victor Berchet <victor@suumit.com>
Date: Fri, 26 Aug 2016 15:38:48 -0700
Subject: [PATCH] feat(codegen): Add an error message when the locale is not
 provided (#11104)

---
 modules/@angular/compiler-cli/src/codegen.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/modules/@angular/compiler-cli/src/codegen.ts b/modules/@angular/compiler-cli/src/codegen.ts
index 4a34f86224..10a5340110 100644
--- a/modules/@angular/compiler-cli/src/codegen.ts
+++ b/modules/@angular/compiler-cli/src/codegen.ts
@@ -143,7 +143,11 @@ export class CodeGenerator {
     const transFile = cliOptions.i18nFile;
     const locale = cliOptions.locale;
     let transContent: string = '';
-    if (transFile && locale) {
+    if (transFile) {
+      if (!locale) {
+        throw new Error(
+            `The translation file (${transFile}) locale must be provided. Use the --locale option.`);
+      }
       transContent = nodeFs.readFileSync(transFile, 'utf8');
     }