Helpers for failing validations

* Update Slack notification to always notify.
* Add optional parameter to `tx-pull-www` to pull just resources for a particular language. Helpful when validations are failing for one language.

.travis.yml

@@ -6,9 +6,7 @@ cache:
   directories:
   - node_modules
 notifications:
-  slack:
-    on_success: never
-    on_failure: $SLACK_NOTIFICATION_TOKEN
+  slack: $SLACK_NOTIFICATION_TOKEN
 jobs:
   include:
     - stage: update translations

scripts/tx-pull-www.js

@@ -14,9 +14,10 @@ const usage = `
  Pull supported language translations from Transifex for the 'scratch-website' project.
  It will query transifex for the list of resources.
  Usage:
-   node tx-pull-www.js path
+   node tx-pull-www.js path [lang]
      path: root for the translated resources.
            Each resource will be a subdirectory containing language json files.
+     lang: optional language code - will only pull resources for that language
    NOTE: TX_TOKEN environment variable needs to be set with a Transifex API token. 
    See the Localization page on the GUI wiki for information about setting up Transifex.
  `;
@@ -39,6 +40,8 @@ const OUTPUT_DIR = path.resolve(args[0]);
 // const MODE = {mode: 'reviewed'}; // default is everything for www
 const CONCURRENCY_LIMIT = 4;
 
+const lang = args.length === 2 ? args[1] : '';
+
 const TX = new transifex({
     project_slug: PROJECT,
     credential: 'api:' + process.env.TX_TOKEN
@@ -73,10 +76,14 @@ const getLocaleData = (item, callback) => {
 const expandResourceFiles = (resources) => {
     let items = [];
     for (let resource of resources) {
+        if (lang) {
+            items.push({resource: resource.slug, locale: lang});
+        } else {
             for (let locale of Object.keys(locales)) {
                 items.push({resource: resource.slug, locale: locale});
             }
         }
+    }
     return items;
 };