Close GH-10: Find .bower.json if it exists.

packages/bower-json/lib/json.js

@@ -3,6 +3,8 @@ var path = require('path');
 var deepExtend = require('deep-extend');
 var createError = require('./util/createError');
 
+var possibleJsons = ['bower.json', 'component.json', '.bower.json'];
+
 function read(file, options, callback) {
     if (typeof options === 'function') {
         callback = options;
@@ -101,25 +103,27 @@ function normalize(json) {
 }
 
 function find(folder, callback) {
-    var file = path.join(folder, 'bower.json');
 
-    fs.exists(file, function (exists) {
-        if (exists) {
-            return callback(null, file);
+    function findRec(fileNames) {
+        var err;
+        var fileName;
+
+        if (!fileNames.length) {
+            err = createError('bower-json: None of "' + possibleJsons.join('", "') + '" were found in ' + folder, 'ENOENT');
+            return callback(err);
         }
 
-        file = path.resolve(path.join(folder, 'component.json'));
-
-        fs.exists(file, function (exists) {
+        fileName = path.resolve(path.join(folder, fileNames[0]));
+        fs.exists(fileName, function(exists) {
             if (exists) {
-                return callback(null, file);
+                return callback(null, fileName);
             }
 
-            var err = new Error('Neither bower.json nor component.json were found in ' + folder);
-            err.code = 'ENOENT';
-            callback(err);
+            findRec(fileNames.slice(1));
         });
-    });
+    }
+
+    findRec(possibleJsons);
 }
 
 module.exports = read;

packages/bower-json/test/pkg-dot-bower-json/.bower.json

@@ -0,0 +1,5 @@
+{
+    "name": "some-installed-pkg",
+    "version": "0.0.1",
+    "main": "bar.js"
+}

packages/bower-json/test/test.js

@@ -25,11 +25,22 @@ describe('.find', function () {
         });
     });
 
+    it('should fallback to the .bower.json file', function(done) {
+        bowerJson.find(__dirname + '/pkg-dot-bower-json', function(err, file) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(file).to.equal(path.resolve(__dirname + '/pkg-dot-bower-json/.bower.json'));
+            done();
+        });
+    })
+
     it('should error if no component.json / bower.json is found', function (done) {
         bowerJson.find(__dirname, function (err) {
             expect(err).to.be.an(Error);
             expect(err.code).to.equal('ENOENT');
-            expect(err.message).to.equal('Neither bower.json nor component.json were found in ' + __dirname);
+            expect(err.message).to.equal('bower-json: None of "bower.json", "component.json", ".bower.json" were found in ' + __dirname);
             done();
         });
     });