add support for minifying local branches

Author: Caolan McMahon

lib/builder.js

@@ -73,10 +73,15 @@ exports.exportMinified = function (wd, treeish, path, output_dir, callback) {
  */
 
 exports.exportAllMinified = function (wd, path, output_dir, callback) {
-    git.getTags(wd, function (err, tags) {
+    async.parallel({
+        tags: async.apply(git.getTags, wd),
+        branches: async.apply(git.getBranches, wd)
+    },
+    function (err, data) {
         if (err) return callback(err);
+        var trees = data.tags.concat(data.branches).concat(['HEAD']);
 
-        async.forEach(tags.concat(['HEAD']), function (treeish, cb) {
+        async.forEach(trees, function (treeish, cb) {
             var outdir = _path.join(output_dir, treeish);
             exports.exportMinified(wd, treeish, path, outdir, cb)
         }, callback);

lib/git.js

@@ -56,6 +56,25 @@ exports.getTags = function (wd, callback) {
 };
 
 
+/**
+ * Gets a list of local branches.
+ *
+ * @param {String} wd
+ * @param {Function} callback
+ * @api public
+ */
+
+exports.getBranches = function (wd, callback) {
+    exports.cmd(wd, ['branch'], function (err, output) {
+        if (err) return callback(err);
+        var branches = output.split('\n').slice(0, -1).map(function (b) {
+            return b.substr(2);
+        });
+        callback(null, branches);
+    });
+};
+
+
 /**
  * Recurses through tree objects below a given path, returning all
  * blobs. The treeish argument can be a tag, commit or branch.