Make build fail fast if meta image build fails or there's no binary i…

…mage

atomicapp_builder/cli.py

@@ -121,31 +121,33 @@ def build(args):
                 res = bldr.build()
                 if not res:
                     func_result = 1
+                    break  # fail fast
                 for l in a.meta_image.build_result.build_logs:
                     logger.debug(l)
                 logger.info('{doing} meta image "{mi}" for app "{app}" {result}.'.
                             format(doing=doing_what, mi=a.meta_image.imagename, app=a.appid,
                                    result='succeeded' if res else 'failed')
                             )
-        if args['check_binary_images']:
-            func_result = func_result or _check_binary_images(apps)
+            if args['check_binary_images']:
+                func_result = _check_binary_images(a)
+                if func_result:
+                    break  # fail fast
+
         if args['keep_tmpdir']:
             logger.info('You can find sources of all apps in {0}'.format(tmpdir))
 
         return func_result
 
 
-def _check_binary_images(apps):
-    res = 0
-    for app in apps:
-        logger.info('Checking for binary images required for app "{0}" ...'.format(app.appid))
-        for bi in app.binary_images:
-            if bi.built:
-                logger.info('Binary image "{0}" exists.'.format(bi.imagename))
-            else:
-                logger.error('Binary image "{0}" doesn\'t exist'.format(bi.imagename))
-                res = 2
-    return res
+def _check_binary_images(app):
+    logger.info('Checking for binary images required for app "{0}" ...'.format(app.appid))
+    for bi in app.binary_images:
+        if bi.built:
+            logger.info('Binary image "{0}" exists.'.format(bi.imagename))
+        else:
+            logger.error('Binary image "{0}" doesn\'t exist'.format(bi.imagename))
+            return 2
+    return 0
 
 
 class TempDir(object):