Initial version

.gitignore

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+.DS_Store
+

LICENSE

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+The MIT License
+
+Copyright (C) 2016 MAK
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

README.md

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+karma-regex-preprocessor
+========================
+
+A karma preprocessor which does one or more regular expression substitutions on the file contents. It effectively just calls `String.prototype.replace()` with the parameters specified in the configuration.
+
+The main motivation for this was that I needed something to quickly simulate the nginx [HttpSubModule](http://wiki.nginx.org/HttpSubModule).
+
+
+Installation
+------------
+
+For the time being install from Github:
+
+```sh
+$ npm install 'git+https://github.com/makern/karma-regex-preprocessor.git' --save-dev
+```
+
+
+Configuration
+-------------
+
+Example configuration:
+
+```js
+// karma.conf.js
+module.exports = function(config) {
+  config.set({
+    preprocessors: {
+      '**/*.js': ['regex']
+    },
+
+    regexPreprocessor: {
+      rules: [
+        // Simple string replace of 'foo' with 'bar'
+        [ 'foo', 'bar' ],
+        // Prefix all numbers with '-'
+        [ /[\d]+/g, '-$1'],
+        // Use a function to calculate replacement
+        [ '%rand%', function(match) { return Math.random() } ]
+      ]
+    }
+  });
+};
+```
+
+
+License
+-------
+
+The MIT License (MIT)

index.js

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+module.exports = {
+    'preprocessor:regex': ['factory', require('./src/regex')]
+};
+

package.json

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+{
+    "name": "karma-regex-preprocessor",
+    "version": "0.0.1",
+    "description": "Regular expression replace preprocessor for karma test runner",
+    "main": "index.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "repository":{
+        "type":"git",
+        "url":"https://github.com/makern/karma-regex-preprocessor.git"
+    },
+    "keywords": [
+        "karma-plugin",
+        "karma-preprocessor"
+    ],
+    "author": "MAK",
+    "license": "MIT",
+    "dependencies": {
+    }
+}

src/regex.js

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+
+var createRegexPreprocessor = function (config, helper, logger) {
+
+    var log = logger.create('preprocessor.regex');
+    var regexConfig = config.regexPreprocessor || {};
+
+    var rules = regexConfig.rules || [];
+
+    return function (content, file, done) {
+        log.debug('Processing "%s".', file.originalPath);
+
+        for (var i = 0; i < rules.length; i++) {
+            var rule = rules[i];
+            content = content.replace(rule[0], rule[1]);
+        }
+
+        done(content);
+    }
+};
+
+createRegexPreprocessor.$inject = ['config', 'helper', 'logger'];
+
+module.exports = createRegexPreprocessor;