source: Dev/trunk/src/client/util/build/plugins/i18n.js

define(function() {
        var nlsRe=
                // regexp for reconstructing the master bundle name from parts of the regexp match
                // nlsRe.exec("foo/bar/baz/nls/en-ca/foo") gives:
                // ["foo/bar/baz/nls/en-ca/foo", "foo/bar/baz/nls/", "/", "/", "en-ca", "foo"]
                // nlsRe.exec("foo/bar/baz/nls/foo") gives:
                // ["foo/bar/baz/nls/foo", "foo/bar/baz/nls/", "/", "/", "foo", ""]
                // so, if match[5] is blank, it means this is the top bundle definition.
                // courtesy of http://requirejs.org
                /(^.*(^|\/)nls(\/|$))([^\/]*)\/?([^\/]*)/;

        return {
                start:function(
                        mid,
                        referenceModule,
                        bc
                ){
                        var i18nPlugin = bc.amdResources["dojo/i18n"],
                        match = nlsRe.exec(mid),
                        bundleName = match[5] || match[4],
                        bundlePath = bc.getSrcModuleInfo(match[1] + bundleName, referenceModule).mid.match(/(.+\/)[^\/]+/)[1],
                        locale = (match[5] && match[4]),
                        i18nResourceMid = bundlePath + (locale ? locale + "/" : "") + bundleName,
                        i18nResource = bc.amdResources[i18nResourceMid];

                        if(!i18nPlugin){
                                throw new Error("i18n! plugin missing");
                        }
                        if(!i18nResource){
                                throw new Error("i18n resource (" + i18nResourceMid + ") missing");
                        }
                        return [i18nPlugin, i18nResource];
                }
        };
});