add version flag (#294)

* add version flag

* set version on the api

bin/prettier.js

@@ -13,11 +13,17 @@ const argv = minimist(process.argv.slice(2), {
     "flow-parser",
     "bracket-spacing",
     "single-quote",
-    "trailing-comma"
+    "trailing-comma",
+    "version"
   ],
   default: { "bracket-spacing": true }
 });
 
+if (argv["version"]) {
+  console.log(jscodefmt.version);
+  process.exit(0);
+}
+
 const filenames = argv["_"];
 const write = argv["write"];
 const stdin = argv["stdin"];

index.js

@@ -3,6 +3,7 @@ const babylon = require("babylon");
 const Printer = require("./src/printer").Printer;
 const flowParser = require("flow-parser");
 const comments = require("./src/comments");
+const version = require('./package.json').version;
 
 var babylonOptions = {
   sourceType: "module",
@@ -74,5 +75,6 @@ function formatWithShebang(text, opts) {
 module.exports = {
   format: function(text, opts) {
     return formatWithShebang(text, opts);
-  }
+  },
+  version: version
 };