1 files changed, 80 insertions, 0 deletions
diff --git a/lib/utils/command.js b/lib/utils/command.js
new file mode 100644
index 0000000..de240df
--- /dev/null
+++ b/lib/utils/command.js
@@ -0,0 +1,80 @@
+var _ = require('lodash');
+var childProcess = require('child_process');
+var spawn = require("spawn-cmd").spawn;
+var Promise = require('./promise');
+
+// Execute a command
+function exec(command, options) {
+    var d = Promise.defer();
+
+    var child = childProcess.exec(command, options, function(err, stdout, stderr) {
+        if (!err) {
+            return d.resolve();
+        }
+
+        err.message = stdout.toString('utf8') + stderr.toString('utf8');
+        d.reject(err);
+    });
+
+    child.stdout.on('data', function (data) {
+        d.notify(data);
+    });
+
+    child.stderr.on('data', function (data) {
+        d.notify(data);
+    });
+
+    return d.promise;
+}
+
+// Spawn an executable
+function spawnCmd(command, args, options) {
+    var d = Promise.defer();
+    var child = spawn(command, args, options);
+
+    child.on('error', function(error) {
+        return d.reject(error);
+    });
+
+    child.stdout.on('data', function (data) {
+        d.notify(data);
+    });
+
+    child.stderr.on('data', function (data) {
+        d.notify(data);
+    });
+
+    child.on('close', function(code) {
+        if (code === 0) {
+            d.resolve();
+        } else {
+            d.reject(new Error('Error with command "'+command+'"'));
+        }
+    });
+
+    return d.promise;
+}
+
+// Transform an option object to a command line string
+function escapeShellArg(s) {
+    s = s.replace(/"/g, '\\"');
+    return '"' + s + '"';
+}
+
+function optionsToShellArgs(options) {
+    return _.chain(options)
+    .map(function(value, key) {
+        if (value === null || value === undefined || value === false) return null;
+        if (value === true) return key;
+        return key + '=' + escapeShellArg(value);
+    })
+    .compact()
+    .value()
+    .join(' ');
+}
+
+module.exports = {
+    exec: exec,
+    spawn: spawnCmd,
+    optionsToShellArgs: optionsToShellArgs
+};