Add simple -watch command (lime update/build/test <target> -watch)

templates/bin/node/watch/node_modules/exec-sh/lib/exec-sh.js

@@ -0,0 +1,89 @@
+var
+  cp = require("child_process"),
+  merge = require("merge");
+
+var
+  sh, cmd,
+  defSpawnOptions = { stdio: "inherit" };
+
+/**
+ * @summary Get shell program meta for current platform
+ * @private
+ * @returns {Object}
+ */
+function getShell(){
+  if (process.platform === "win32") {
+    return { cmd: "cmd", arg: "/C" };
+  } else {
+    return { cmd: "sh", arg: "-c" };
+  }
+}
+
+/**
+ * Callback is called with the output when the process terminates. Output is
+ * available when true is passed as options argument or stdio: null set
+ * within given options.
+ *
+ * @summary Execute shell command forwarding all stdio
+ * @param {String|Array} command
+ * @param {Object|TRUE} [options] spawn() options or TRUE to set stdio: null
+ * @param {Function} [callback]
+ * @returns {ChildProcess}
+ */
+function execSh(command, options, callback){
+  if (Array.isArray(command)) {
+    command = command.join(";");
+  }
+
+  if (options === true) {
+    options = { stdio: null };
+  }
+
+  if (typeof options === "function") {
+    callback = options;
+    options = defSpawnOptions;
+  } else {
+    options = options || {};
+    options = merge(true, defSpawnOptions, options);
+    callback = callback || function(){};
+  }
+
+  var
+    child,
+    stdout = "", stderr = "",
+    shell = getShell();
+
+  try {
+    child = cp.spawn(shell.cmd, [shell.arg, command], options);
+  } catch (e) {
+    callback(e, stdout, stderr);
+    return;
+  }
+
+  if (child.stdout) {
+    child.stdout.on("data", function(data){
+      stdout += data;
+    });
+  }
+
+  if (child.stderr) {
+    child.stderr.on("data", function(data){
+      stderr += data;
+    });
+  }
+
+  child.on("close", function(code){
+    if (code) {
+      var e = new Error("Shell command exit with non zero code: " + code);
+      e.code = code;
+      callback(e, stdout, stderr);
+    } else {
+      callback(null, stdout, stderr);
+    }
+  });
+
+  return child;
+}
+
+module.exports = execSh;
+