Exit with an error code if uploading fails

Also
* try to upload the failed assets once
* generalize task names, i.e. remove travis from names
* upgrade dependencies

This fixes #75.

index.js

@@ -136,8 +136,10 @@ if (options.dryRun) {
             }
 
             if (Array.isArray(errors) && errors.length > 0) {
-                console.log('\n---Failing assets---');
-                errors.forEach(e => console.log(`${e.item.path}: ${e.message}`));
+                console.error('\n---Failing assets---');
+                errors.forEach(error => console.error(`${error.item.path}: ${error.message}`));
+
+                process.exit(1);
             }
         }
     );

lib/uploader.js

@@ -1,5 +1,5 @@
 const { Storage } = require('@google-cloud/storage');
-const PromisePool = require('@supercharge/promise-pool');
+const { PromisePool } = require('@supercharge/promise-pool');
 const { isDirectory, makeAbsolute, getFilesToUpload } = require('./file-util');
 
 function uploadToGCS(bucket, cacheControl, validate, resume, asset) {
@@ -52,11 +52,26 @@ function getAllAssetsToUpload(options) {
     );
 }
 
-function upload(options) {
+async function retry(errors, options) {
+    const assetsToRetry = errors.map((error) => error.item);
+
+    if (assetsToRetry.length !== 0) {
+        console.log(`---Retrying ${assetsToRetry.length} files---`);
+        return uploadToCloud(options, assetsToRetry);
+    }
+
+    return {results: [], errors: []}
+}
+
+async function upload(options) {
     const assets = getAllAssetsToUpload(options);
-    console.log(`---Uploading ${assets.length} files---`)
 
-    return uploadToCloud(options, assets);
+    console.log(`---Uploading ${assets.length} files---`);
+    const {results: uploadedAssetsFirst, errors: errorsFirst} = await uploadToCloud(options, assets);
+
+    const {results: uploadedAssetsRetried, errors: errorsRetried} = await retry(errorsFirst, options);
+
+    return {results: uploadedAssetsFirst.concat(uploadedAssetsRetried), errors: errorsRetried};
 }
 
 module.exports = { getAllAssetsToUpload, upload };