[build] added gulp builder

tasks/exec.js

@@ -0,0 +1,32 @@
+const gutil = require('gulp-util');
+const child_process = require('child_process');
+const async = require('async');
+const col = gutil.colors;
+const Promise = require("bluebird");
+
+
+const TAG = col.green('[exec]');
+
+const queue = async.queue((task, done) => {
+    //gutil.log(TAG, col.magenta(task.command));
+    //process.chdir(task.dir);
+    child_process.exec(task.command, {cwd: task.dir, maxBuffer: 1024 * 5000}, (err, stdout, stderr) => {
+        if (err) {
+            task.failure(stderr || stdout || err);
+        } else {
+            task.success({stdout: stdout, stderr: stderr});
+        }
+        done();
+    });
+});
+
+module.exports = (dir, command) => {
+    return new Promise((success, failure) => {
+        queue.push({
+            dir: dir,
+            command: command,
+            success: success,
+            failure: failure,
+        });
+    });
+};