Added -e, --eval

Author: tjholowaychuk

src/node.cc

@@ -68,6 +68,8 @@ static Persistent<String> listeners_symbol;
 static Persistent<String> uncaught_exception_symbol;
 static Persistent<String> emit_symbol;
 
+
+static char *eval_string = NULL;
 static int option_end_index = 0;
 static bool use_debug_agent = false;
 static bool debug_wait_connect = false;
@@ -1612,6 +1614,11 @@ static void Load(int argc, char *argv[]) {
 
   process->Set(String::NewSymbol("pid"), Integer::New(getpid()));
 
+  // -e, --eval
+  if (eval_string) {
+    process->Set(String::NewSymbol("_eval"), String::New(eval_string));
+  }
+
   size_t size = 2*PATH_MAX;
   char execPath[size];
   if (OS::GetExecutablePath(execPath, &size) != 0) {
@@ -1764,6 +1771,13 @@ static void ParseArgs(int *argc, char **argv) {
     } else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) {
       PrintHelp();
       exit(0);
+    } else if (strcmp(arg, "--eval") == 0 || strcmp(arg, "-e") == 0) {
+      if (*argc <= i + 1) {
+        fprintf(stderr, "Error: --eval requires an argument\n");
+        exit(1);
+      }
+      argv[i] = const_cast<char*>("");
+      eval_string = argv[++i];
     } else if (strcmp(arg, "--v8-options") == 0) {
       argv[i] = const_cast<char*>("--help");
     } else if (argv[i][0] != '-') {

src/node.js

@@ -746,17 +746,21 @@ if (process.argv[0].indexOf('/') > 0) {
 }
 
 if (process.argv[1]) {
+  // Load module
   if (process.argv[1].charAt(0) != "/" && !(/^http:\/\//).exec(process.argv[1])) {
     process.argv[1] = path.join(cwd, process.argv[1]);
   }
-
   // REMOVEME: nextTick should not be necessary. This hack to get
   // test/simple/test-exception-handler2.js working.
   process.nextTick(function() {
     module.runMain();
   });
+
+} else if (process._eval) {
+    // -e, --eval
+    if (process._eval) console.log(eval(process._eval));
 } else {
-  // No arguments, run the repl
+    // REPL
   module.requireNative('repl').start();
 }