Add forgotten file lib/utils.js

lib/utils.js

@@ -0,0 +1,69 @@
+exports.print = function (x) {
+  node.stdio.write(x);
+};
+
+exports.puts = function (x) {
+  node.stdio.write(x.toString() + "\n");
+};
+
+exports.debug = function (x) {
+  node.stdio.writeError("DEBUG: " + x.toString() + "\n");
+};
+
+exports.error = function (x) {
+  node.stdio.writeError(x.toString() + "\n");
+};
+
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ * 
+ * @param {Object} value The object to print out
+ */
+exports.inspect = function (value) {
+  if (value === 0) return "0";
+  if (value === false) return "false";
+  if (value === "") return '""';
+  if (typeof(value) == "function") return "[Function]";
+  if (value === undefined) return;
+  
+  try {
+    return JSON.stringify(value);
+  } catch (e) {
+    // TODO make this recusrive and do a partial JSON output of object.
+    if (e.message.search("circular")) {
+      return "[Circular Object]";
+    } else {
+      throw e;
+    }
+  }
+};
+
+exports.p = function (x) {
+  exports.error(exports.inspect(x));
+};
+
+exports.exec = function (command) {
+  var child = node.createChildProcess(command);
+  var stdout = "";
+  var stderr = "";
+  var promise = new node.Promise();
+
+  child.addListener("output", function (chunk) {
+    if (chunk) stdout += chunk; 
+  });
+
+  child.addListener("error", function (chunk) {
+    if (chunk) stderr += chunk; 
+  });
+  
+  child.addListener("exit", function (code) {
+    if (code == 0) {
+      promise.emitSuccess(stdout, stderr);
+    } else {
+      promise.emitError(code, stdout, stderr);
+    }
+  });
+
+  return promise;
+};