Using different technique to ignore changes.

cli/utils/ts-linter.js

@@ -22,18 +22,16 @@ function lintSync() {
 
   // Convert buffers to strings.
   let output = [];
-  if (spawnResult.output) {
-    spawnResult.output.forEach((buffer) => {
-      if (buffer === null) {
-        return;
-      }
-
-      const str = buffer.toString().trim();
-      if (str) {
-        output.push(str);
-      }
-    });
-  }
+  spawnResult.output.forEach((buffer) => {
+    if (buffer === null) {
+      return;
+    }
+
+    const str = buffer.toString().trim();
+    if (str) {
+      output.push(str);
+    }
+  });
 
   // Convert multi-line errors into single errors.
   let errors = [];

config/karma/shared.karma.conf.js

@@ -42,6 +42,8 @@ function getConfig(config) {
   const minimist = require('minimist');
   const argv = minimist(process.argv.slice(2));
   const path = require('path');
+  const srcPath = path.join(process.cwd(), 'src');
+
   let testWebpackConfig = require('../webpack/test.webpack.config');
   let remapIstanbul = require('remap-istanbul');
 
@@ -96,12 +98,17 @@ function getConfig(config) {
     //  trigger the `invalid` event, causing karma to constantly re-rerun
     //  the tests.  This is a by-product of using `require.context`.
     // https://github.com/webpack-contrib/karma-webpack/issues/253#issuecomment-335545430
+    // By using require.context in our @skyux/i18n library ALL project files are watched by default.
+    // The function below ignores all files execpt the `src` directory.
     webpackMiddleware: {
       watchOptions: {
-        ignored: [
-          '**/coverage/**',
-          '**/.skypageslocales/**'
-        ]
+        // Returning `true` means the file should be ignored.
+        // Fat-Arrow functions do not work as chokidar will inspect this method.
+        ignored: function (item) {
+          const resolvedPath = path.resolve(item);
+          const ignore = (resolvedPath.indexOf(srcPath) === -1);
+          return ignore;
+        }
       }
     },
 

test/config-karma-shared.spec.js

@@ -1,6 +1,7 @@
 /*jshint jasmine: true, node: true */
 'use strict';
 
+const path = require('path');
 const mock = require('mock-require');
 
 describe('config karma shared', () => {
@@ -125,4 +126,27 @@ describe('config karma shared', () => {
     });
   });
 
+  it('should ignore anything outside the src directory in webpackMiddleware', () => {
+    mock('../config/sky-pages/sky-pages.config.js', {
+      getSkyPagesConfig: () => ({
+        skyux: {}
+      })
+    });
+
+    mock(testConfigFilename, {
+      getWebpackConfig: () => {}
+    });
+
+    mock.reRequire('../config/karma/shared.karma.conf')({
+      set: (config) => {
+        const filter = config.webpackMiddleware.watchOptions.ignored;
+        expect(filter).toBeDefined();
+        expect(filter(path.join(process.cwd(), 'src'))).toBe(false);
+        expect(filter(path.join(process.cwd(), 'node_modules'))).toBe(true);
+        expect(filter(path.join(process.cwd(), '.skypageslocales'))).toBe(true);
+        expect(filter(path.join(process.cwd(), 'coverage'))).toBe(true);
+      }
+    });
+  });
+
 });