[bitbake-devel] [RFC][WIP][PATCH] runqueue: Don't fail without match found

[Martin Jansa]

* WIP, because I haven't checked the reasons why this happens
  I'm using this now only to see which recipes/tasks are failing
  like this

Signed-off-by: Martin Jansa <Martin.Jansa at gmail.com>
---
 lib/bb/runqueue.py | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/bb/runqueue.py b/lib/bb/runqueue.py
index 4577236..413b95e 100644
--- a/lib/bb/runqueue.py
+++ b/lib/bb/runqueue.py
@@ -1224,10 +1224,14 @@ class RunQueue:
             if match is None:
                 bb.fatal("Can't find a task we're supposed to have written out? (hash: %s)?" % h)
             matches = {k : v for k, v in matches.iteritems() if h not in k}
-            latestmatch = sorted(matches.keys(), key=lambda f: matches[f])[-1]
-            prevh = __find_md5__.search(latestmatch).group(0)
-            output = bb.siggen.compare_sigfiles(latestmatch, match, recursecb)
-            bb.plain("\nTask %s:%s couldn't be used from the cache because:\n  We need hash %s, closest matching task was %s\n  " % (pn, taskname, h, prevh) + '\n  '.join(output))
+            sortedmatches=sorted(matches.keys(), key=lambda f: matches[f])
+            if sortedmatches:
+                latestmatch = sorted(matches.keys(), key=lambda f: matches[f])[-1]
+                prevh = __find_md5__.search(latestmatch).group(0)
+                output = bb.siggen.compare_sigfiles(latestmatch, match, recursecb)
+                bb.plain("\nTask %s:%s couldn't be used from the cache because:\n  We need hash %s, closest matching task was %s\n  " % (pn, taskname, h, prevh) + '\n  '.join(output))
+            else:
+                bb.plain("\nTask %s:%s couldn't find any matches for hash %s" % (pn, taskname, h))
              
 
 
-- 
1.8.4.3