From 0571ad5ad7db0d9facf2f8c3e5d5b62f3ba2fa25 Mon Sep 17 00:00:00 2001
From: Dominik Prokop <dominik.prokop@grafana.com>
Date: Wed, 9 Jan 2019 11:33:08 +0100
Subject: [PATCH] Removes unnecessary warnings from webpack output about
 missing exports

This should not break anything as ForkTsCheckerWebpackPlugin takes care of that
---
 scripts/webpack/IgnoreNotFoundExportPlugin.js | 22 +++++++++++++++++++
 scripts/webpack/webpack.hot.js                |  2 ++
 2 files changed, 24 insertions(+)
 create mode 100644 scripts/webpack/IgnoreNotFoundExportPlugin.js

diff --git a/scripts/webpack/IgnoreNotFoundExportPlugin.js b/scripts/webpack/IgnoreNotFoundExportPlugin.js
new file mode 100644
index 00000000000..37bf1f7200e
--- /dev/null
+++ b/scripts/webpack/IgnoreNotFoundExportPlugin.js
@@ -0,0 +1,22 @@
+// https://github.com/TypeStrong/ts-loader/issues/653#issuecomment-390889335
+
+const ModuleDependencyWarning = require("webpack/lib/ModuleDependencyWarning")
+
+module.exports = class IgnoreNotFoundExportPlugin {
+    apply(compiler) {
+        const messageRegExp = /export '.*'( \(reexported as '.*'\))? was not found in/
+        function doneHook(stats) {
+            stats.compilation.warnings = stats.compilation.warnings.filter(function(warn) {
+                if (warn instanceof ModuleDependencyWarning && messageRegExp.test(warn.message)) {
+                    return false
+                }
+                return true;
+            })
+        }
+        if (compiler.hooks) {
+            compiler.hooks.done.tap("IgnoreNotFoundExportPlugin", doneHook)
+        } else {
+            compiler.plugin("done", doneHook)
+        }
+    }
+}
diff --git a/scripts/webpack/webpack.hot.js b/scripts/webpack/webpack.hot.js
index ca08ff1e726..b37e4c08592 100644
--- a/scripts/webpack/webpack.hot.js
+++ b/scripts/webpack/webpack.hot.js
@@ -7,6 +7,7 @@ const webpack = require('webpack');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const HtmlWebpackHarddiskPlugin = require('html-webpack-harddisk-plugin');
 const CleanWebpackPlugin = require('clean-webpack-plugin');
+const IgnoreNotFoundExportPlugin = require("./IgnoreNotFoundExportPlugin.js");
 
 module.exports = merge(common, {
   entry: {
@@ -111,5 +112,6 @@ module.exports = merge(common, {
         NODE_ENV: JSON.stringify('development'),
       },
     }),
+    new IgnoreNotFoundExportPlugin(),
   ],
 });