Add Hash util and split out file helper.

lib/common/file.js

@@ -0,0 +1,36 @@
+'use strict';
+
+var _ = require('lodash'),
+    fs = require('fs-extra'),
+    glob = require('glob'),
+    path = require('path');
+
+var minify = require('../common/minify.js');
+
+/*----------------------------------------------------------------------------*/
+
+function copy(srcPath, destPath) {
+  return _.partial(fs.copy, srcPath, destPath);
+}
+
+function globTemplate(pattern) {
+  return _.transform(glob.sync(pattern), function(result, filePath) {
+    var key = path.basename(filePath, path.extname(filePath));
+    result[key] = _.template(fs.readFileSync(filePath, 'utf8'));
+  }, {});
+}
+
+function min(srcPath, destPath) {
+  return _.partial(minify, srcPath, destPath);
+}
+
+function write(filePath, data) {
+  return _.partial(fs.writeFile, filePath, data);
+}
+
+module.exports = {
+  'copy': copy,
+  'globTemplate': globTemplate,
+  'min': min,
+  'write': write
+};