commit 9ee5dc28ce48ae072a094229f03d3c3bccc9d97c
author Dan Shi <dshi@google.com> Tue Jun 27 11:53:07 2017 -0700
committer Dan Shi <dshi@google.com> Tue Jun 27 21:43:18 2017 +0000
tree e11f5863764b4c444989cd76acab28714f0d63bc
parent 9b62981bab1968f13bd4ca5eff64b6382ed464e6

Log all available artifacts name in exception for troubleshooting

BUG=b:63058849
TEST=local run devserver

Change-Id: I77a2a0709ecf72e1dc49cc455735704e9692233a
Reviewed-on: https://chromium-review.googlesource.com/549986
Commit-Queue: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Trybot-Ready: Dan Shi <dshi@google.com>
Reviewed-by: Kris Rambish <krisr@chromium.org>

downloader.py

diff --git a/downloader.py b/downloader.py
index f3ff144..68de871 100755
--- a/downloader.py
+++ b/downloader.py
@@ -454,8 +454,10 @@
 
     if not names:
       raise build_artifact.ArtifactDownloadError(
-          'No artifact found with given name: %s for %s-%s' %
-          (name, self.target, self.build_id))
+          'No artifact found with given name: %s for %s-%s. All available '
+          'artifacts are: %s' %
+          (name, self.target, self.build_id,
+           ','.join([a['name'] for a in artifacts])))
 
     return names