Stop yarn from failing test if snapshot fails

2 files changed, 11 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index 335c679..57e12f2 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,13 @@ NEWS for cmdtest
 
 This file summarizes changes between releases of cmdtest.
 
+Version 0.12, released UNRELEASED
+---------------------------------
+
+For yarn:
+
+* Do not fail a test suite if snapshotting `DATADIR` fails.
+
 Version 0.11, released 2014-03-15
 ---------------------------------
 
diff --git a/yarn b/yarn
index bb62493..c34ccbb 100755
--- a/yarn
+++ b/yarn
@@ -454,7 +454,10 @@ class YarnRunner(cliapp.Application):
 
     def snapshot_datadir(self, tempdir, datadir, scenario, step_number, step):
         snapshot = self.snapshot_dir(tempdir, scenario, step, step_number)
-        cliapp.runcmd(['cp', '-ax', datadir, snapshot])
+        exit, out, err = cliapp.runcmd_unchecked(
+            ['cp', '-ax', datadir, snapshot])
+        if exit != 0:
+            logging.warning('Snapshot copy failed:\n%s\n%s' % (out, err))
 
     def nice(self, name):
         # Quote a scenario or step name so it forms a nice filename.