Add nomnom for option parsing. Allow indentation option"

lib/cli.js

@@ -1,7 +1,30 @@
 #!/usr/bin/env node
 
 var sys = require("sys");
+var fs = require("fs");
 var parser = require("./jsonlint").parser;
+var options = require("nomnom")
+  .scriptName("jsonlint")
+  .opts({
+    file: {
+      position: 0,
+      help: "file to parse; otherwise uses stdin"
+    },
+    version: {
+      string: '-v, --version',
+      help: 'print version and exit',
+      callback: function() {
+        return JSON.parse(fs.readFileSync(__dirname + "/../package.json", "utf8")).version;
+      }
+    },
+    indent : {
+      string: '-t CHAR, --indent CHAR',
+      default: " ",
+      help: 'character(s) to use for indentation'
+    }
+  })
+  .parseArgs();
+
 
 function parse (source) {
   try {
@@ -14,8 +37,8 @@ function parse (source) {
 
 function main (args) {
   var source = '';
-  if (args[1]) {
-    source = require('fs').readFileSync(require('path').join(process.cwd(), args[1]), "utf8");
+  if (options.file) {
+    source = fs.readFileSync(require('path').join(process.cwd(), options.file), "utf8");
     parse(source);
   } else {
     var stdin = process.openStdin();

package.json

@@ -24,7 +24,9 @@
   "engines": {
     "node": "0.4 || 0.5"
   },
-  "dependencies": {},
+  "dependencies": {
+    "nomnom": ">= 0.4.3"
+  },
   "devDependencies": {
     "test": "*",
     "jison": "*",