git.py: Improve command failure error messages

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

diff --git a/bitbake/lib/bb/fetch/git.py b/bitbake/lib/bb/fetch/git.py
index 911c5e437feb69378be565e86ce1dcb05461a280..6e4e67c40f6901dc3e5109878eba3a3f68359257 100644 (file)
--- a/bitbake/lib/bb/fetch/git.py
+++ b/bitbake/lib/bb/fetch/git.py
@@ -139,7 +139,10 @@ class Git(Fetch):
         else:
             username = ""
 
-        output = runfetchcmd("git ls-remote %s://%s%s%s %s" % (ud.proto, username, ud.host, ud.path, ud.branch), d, True)
+        cmd = "git ls-remote %s://%s%s%s %s" % (ud.proto, username, ud.host, ud.path, ud.branch)
+        output = runfetchcmd(cmd, d, True)
+        if not output:
+            raise bb.fetch.FetchError("Fetch command %s gave empty output\n" % (cmd))
         return output.split()[0]
 
     def _build_revision(self, url, ud, d):