add byPath param

Gruntfile.js

@@ -27,6 +27,7 @@ module.exports = function(grunt) {
             compare: {
                 src: ['test/**/*.json'],
                 filter: 'isFile',
+                byPath:true,
                 fatal: true
             }
         },

README.md

@@ -27,7 +27,8 @@ grunt.initConfig({
   comparejson: {
     compare: {
       src: ['<dir>'],
-      fatal: true | false
+      fatal: true | false,
+      byPath: true | false
     }
   }
 })
@@ -48,6 +49,18 @@ Default value: `true`
 
 Flag to indicate wheter or not the task failed if some differences are found.
 
+#### byPath
+Type: `Boolean`<br />
+Mandatory: `false`<br />
+Default value: `false`
+
+Flag to indicate that files will be compared by path. For example :
+/path1/file1.json
+/path1/file1.json
+/path2/file3.json
+
+The file1.json will only be compared with the file2.json. 
+
 ### Usage Examples
 
 ```js
@@ -56,6 +69,7 @@ grunt.initConfig({
     compare: {
       src: ['dir/**/*.json'],
       fatal: true
+      byPath: false
     }
   }
 })

tasks/compare-json.js

@@ -7,35 +7,71 @@
  */
 
 'use strict';
-var utils = require('../lib/utils');
+var utils = require('../lib/utils'),
+    path = require('path');
 
-module.exports = function(grunt) {
+module.exports = function (grunt) {
 
-    grunt.registerMultiTask('comparejson', 'Compare some JSON files', function() {
+    grunt.registerMultiTask('comparejson', 'Compare some JSON files', function () {
 
         // Fail task if no src directory property is set.
         grunt.config.requires('comparejson.compare.src');
 
-        var allParsedFiles = [];
+        var allParsedFiles = [],
+            fatal = grunt.config.get('comparejson').compare.fatal,
+            isByPath = grunt.config.get('comparejson').compare.byPath,
+            byPath = {},
+            currentPath,
+            result = true,
+            reports;
 
         // First, parse all the json file into javascript map
-        this.files.forEach(function(file) {
+        this.files.forEach(function (file) {
             allParsedFiles = utils.JSONFilesToMap(grunt, file.src);
         });
 
-        // Then, compare each
-        var reports = utils.compareMaps(allParsedFiles);
+        if (isByPath) {
+            allParsedFiles.forEach(function (item) {
+                currentPath = path.dirname(item.fileName);
 
-        // If we get some differences, the task is failed and the reports is shown
-        if (reports.length) {
-            reports.forEach(function(report) {
-                grunt.log.error(report);
+                if (!byPath[currentPath]) {
+                    byPath[currentPath] = [];
+                }
+
+                byPath[currentPath].push(item);
             });
 
-            return !grunt.config.get('comparejson').compare.fatal;
+            Object.keys(byPath).forEach(function (bucket) {
+                reports = utils.compareMaps(byPath[bucket]);
+
+                if (reports.length) {
+                    grunt.log.error('path name ' + bucket);
+                    reports.forEach(function (report) {
+                        grunt.log.error(report);
+                    });
+
+                    result = false;
+                }
+            });
+        } else {
+            // Then, compare each
+            reports = utils.compareMaps(allParsedFiles);
+
+            // If we get some differences, the task is failed and the reports is shown
+            if (reports.length) {
+                reports.forEach(function (report) {
+                    grunt.log.error(report);
+                });
+
+                result = false;
+            }
         }
 
-        grunt.log.writeln('SUCCESS : all files have the same keys.');
-        return true;
+        if (result) {
+            grunt.log.writeln('SUCCESS : all files have the same keys.');
+            return true;
+        } else {
+            return !fatal;
+        }
     });
 };

test/data/fileD.json

@@ -0,0 +1,13 @@
+{
+    "JSON.string.1": "string1",
+    "JSON.string.2": "string2",
+    "JSON.string.3": "string3",
+
+    "JSON.int.1": "int1",
+    "JSON.int.2": "int2",
+    "JSON.int.3": "int3",
+
+    "JSON.subs": {
+        "sub.5": "sub1"
+    }
+}