Add '/version' endpoint

Closes #138
Includes testcase

NEWS.md

@@ -4,6 +4,7 @@
 New features:
 
  * Add optional support for rollbar (#137)
+ * Add '/version' endpoint (#138)
 
 Enhancements:
 

app/controllers/app.js

@@ -94,6 +94,13 @@ if ( global.settings.hasOwnProperty('node_socket_timeout') ) {
   });
 }
 
+// Version extracting function
+function getVersion() {
+  var version = {};
+  version.cartodb_sql_api = require(__dirname + '/../../package.json').version;
+  return version;
+}
+
 app.use(express.bodyParser());
 app.enable('jsonp callback');
 app.set("trust proxy", true);
@@ -103,6 +110,9 @@ app.options('*', function(req,res) { setCrossDomain(res); res.end(); });
 app.all(global.settings.base_url+'/sql',     function(req, res) { handleQuery(req, res) } );
 app.all(global.settings.base_url+'/sql.:f',  function(req, res) { handleQuery(req, res) } );
 app.get(global.settings.base_url+'/cachestatus',  function(req, res) { handleCacheStatus(req, res) } );
+app.get(global.settings.base_url+'/version', function(req, res) {
+  res.send(getVersion());
+});
 
 // Return true of the given query may write to the database
 //

test/acceptance/app.test.js

@@ -33,6 +33,20 @@ var expected_cache_control = 'no-cache,max-age=31536000,must-revalidate,public';
 var expected_rw_cache_control = 'no-cache,max-age=0,must-revalidate,public';
 var expected_cache_control_persist = 'public,max-age=31536000';
 
+test('GET /api/v1/version', function(done){
+    assert.response(app, {
+        url: '/api/v1/version',
+        method: 'GET'
+    },{}, function(res) {
+        assert.equal(res.statusCode, 200);
+        var parsed = JSON.parse(res.body);
+        var sqlapi_version = require(__dirname + '/../../package.json').version;
+        assert.ok(parsed.hasOwnProperty('cartodb_sql_api'), "No 'cartodb_sql_api' version in " + parsed);
+        assert.equal(parsed.cartodb_sql_api, sqlapi_version);
+        done();
+    });
+});
+
 test('GET /api/v1/sql', function(done){
     assert.response(app, {
         url: '/api/v1/sql',