From 9fa4373fc4d28f820eb326b9fb802c7532e726d0 Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Mon, 20 May 2019 16:56:08 -0400
Subject: [PATCH] fix(@angular/cli): show error when using x18n command on
 Node.js 12.0

Node.js 12.0 contains a defect which will cause the command to crash.  This is due to the locale support in Node.js 12.0 (ICU).  ref: https://github.com/nodejs/node/issues/27379
---
 packages/angular/cli/commands/xi18n-impl.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/angular/cli/commands/xi18n-impl.ts b/packages/angular/cli/commands/xi18n-impl.ts
index 59e191dd5259..5412750138df 100644
--- a/packages/angular/cli/commands/xi18n-impl.ts
+++ b/packages/angular/cli/commands/xi18n-impl.ts
@@ -15,6 +15,15 @@ export class Xi18nCommand extends ArchitectCommand<Xi18nCommandSchema> {
   public readonly multiTarget: true;
 
   public async run(options: Xi18nCommandSchema & Arguments) {
+    const version = process.version.substr(1).split('.');
+    if (Number(version[0]) === 12 && Number(version[1]) === 0) {
+      this.logger.error(
+        'Due to a defect in Node.js 12.0, the command is not supported on this Node.js version. '
+        + 'Please upgrade to Node.js 12.1 or later.');
+
+      return 1;
+    }
+
     return this.runArchitectTarget(options);
   }
 }