1 files changed, 47 insertions, 0 deletions
diff --git a/library/moment/tasks/embed_locales.js b/library/moment/tasks/embed_locales.js
new file mode 100644
index 000000000..5027af10c
--- /dev/null
+++ b/library/moment/tasks/embed_locales.js
@@ -0,0 +1,47 @@
+
+module.exports = function (grunt) {
+    grunt.registerTask('embedLocales', function () {
+        var config = grunt.config('embedLocales');
+
+        var files = grunt.file.expand(config.targetLocales);
+        var embeddedContents = determineEmbeddedContent(files);
+
+        var momentContents = grunt.file.read(config.moment);
+        var modifiedContents = momentContents.replace('/* EMBED_LOCALES */', function () {
+            // If we don't do this, $ symbols in locale files may get interpreted in
+            // the regex replacement
+            return embeddedContents;
+        });
+
+        grunt.file.write(config.dest, modifiedContents);
+    });
+
+    var languageReset = 'moment.locale(\'en\');';
+
+    function determineEmbeddedContent(files) {
+        var embeddedContent = '';
+        files.forEach(function (file) {
+            embeddedContent += transformFile(file);
+        });
+        embeddedContent += '\n    ' + languageReset + '\n';
+        return embeddedContent;
+    }
+
+    var reTransform = /function \(factory\) \{[^]*\}(?=\(function \(moment\) \{)/gm;
+    var replaceWith =
+        'function (factory) {\n' +
+        '    factory(moment);\n' +
+        '}';
+
+    function transformFile(file) {
+        var fileContents = grunt.file.read(file);
+
+        if (!fileContents.match(reTransform)) {
+            grunt.warn('Warning: all locale files must use the common UMD wrapper pattern. Failed locale file: ' + file);
+            return '';
+        }
+
+        return fileContents.replace(reTransform, replaceWith);
+    }
+};
+