Initial import with skill sheet working

node_modules/vinyl-sourcemaps-apply/index.js

@@ -0,0 +1,39 @@
+'use strict';
+var SourceMapGenerator = require('source-map').SourceMapGenerator;
+var SourceMapConsumer = require('source-map').SourceMapConsumer;
+
+module.exports = function applySourceMap(file, sourceMap) {
+  if (typeof sourceMap === 'string' || sourceMap instanceof String) {
+    sourceMap = JSON.parse(sourceMap);
+  }
+
+  if (file.sourceMap && (typeof file.sourceMap === 'string' || file.sourceMap instanceof String)) {
+    file.sourceMap = JSON.parse(file.sourceMap);
+  }
+
+  // check source map properties
+  assertProperty(sourceMap, "file");
+  assertProperty(sourceMap, "mappings");
+  assertProperty(sourceMap, "sources");
+
+  // fix paths if Windows style paths
+  sourceMap.file = sourceMap.file.replace(/\\/g, '/');
+  sourceMap.sources = sourceMap.sources.map(function(filePath) {
+    return filePath.replace(/\\/g, '/');
+  });
+
+  if (file.sourceMap && file.sourceMap.mappings !== '') {
+    var generator = SourceMapGenerator.fromSourceMap(new SourceMapConsumer(sourceMap));
+    generator.applySourceMap(new SourceMapConsumer(file.sourceMap));
+    file.sourceMap = JSON.parse(generator.toString());
+  } else {
+    file.sourceMap = sourceMap;
+  }
+};
+
+function assertProperty(sourceMap, propertyName) {
+  if (!sourceMap.hasOwnProperty(propertyName)) {
+    var e = new Error('Source map to be applied is missing the \"' + propertyName + '\" property');
+    throw e;
+  }
+}