Merge from command line

and bump version to 1.0.4

README.md

@@ -290,6 +290,11 @@ Where `id` is the report name. It's possible to merge more than two reports addi
 
 The returned JSON has the same structure of a single report.
 
+It's also possible to merge multiple reports from the command line
+
+    node merge.js -o destination_report.json report1.json report2.json [... reportN.json]
+
+
 ## Interpreters
 
 node-coverage has a modular system for interpreting and instrumenting JavaScript files. This allows you to create an interpreter for any type of file.

instrument.js

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 var fileSystem = require("./lib/fileSystem");
 var argv = require("optimist")
 	.usage("Instrument a folder for code coverage.\n$0 source destination")

merge.js

@@ -0,0 +1,36 @@
+#!/usr/bin/env node
+var fs = require("fs");
+var report = require("./lib/report");
+var argv = require("optimist")
+	.usage("Merge coverage reports.\n$0 -o destination source [source ...]")
+	.boolean("h").alias("h", "help")
+	.alias("o", "output").describe("o", "Output file.")
+	.argv;
+
+
+if (argv.h) {
+	help(true);
+} else if (!argv.o) {
+	console.error("Output file is mandatory.");
+	help();
+} else if (argv._.length < 2) {
+	console.error("Output file is mandatory.");
+	help();
+} else {
+	good(argv.o, argv._);
+}
+
+function help (cleanExit) {
+	require("optimist").showHelp();
+	if (cleanExit) {
+		process.exit(0);
+	}
+}
+
+function good (destination, files) {
+	var reports = [];
+	files.forEach(function (file) {
+		reports.push(JSON.parse(fs.readFileSync(file)));
+	});
+	fs.writeFileSync(destination, JSON.stringify(report.mergeReports(reports)));
+}

package.json

@@ -16,7 +16,7 @@
   ],
   "name": "node-coverage",
   "description": "node-coverage is a tool that measures code coverage of JavaScript application.",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "homepage": "https://github.com/piuccio/node-coverage",
   "repository": {
     "type": "git",
@@ -25,7 +25,8 @@
   "main": "./index",
   "bin": {
     "node-coverage-instrument": "./instrument.js",
-    "node-coverage": "./server.js"
+    "node-coverage": "./server.js",
+    "node-coverage-merge": "./merge.js"
   },
   "dependencies": {
     "optimist": "~0.3.1",

server.js

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 var fs = require("fs");
 var argv = require("optimist")
 	.usage("Start a simple web server to instrument JS code.")