When a build fails, generate a status message showing which package

failed and the path of the relevant log file if available. Thanks
to _neuron_ for the suggestion. Here is some sample output:

 >>> Emerging (1 of 1) foo-bar/baz-1.0
 >>> Failed to emerge foo-bar/baz-1.0, Log file:
 >>>  '/var/log/portage/foo-bar:baz-1.0:20080814-202327.log'


svn path=/main/trunk/; revision=11411

1 files changed, 46 insertions, 18 deletions

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 9bc06db22..a900dbb61 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -9428,27 +9428,12 @@ class Scheduler(PollScheduler):
 
 			log_paths = [failed_pkg.build_log]
 
-			if not (build_dir and os.path.isdir(build_dir)):
-				log_paths.append(failed_pkg.fetch_log)
-
-			for log_path in log_paths:
-				if not log_path:
-					continue
-
-				try:
-					log_size = os.stat(log_path).st_size
-				except OSError:
-					continue
-
-				if log_size == 0:
-					continue
-
+			log_path = self._locate_failure_log(failed_pkg)
+			if log_path is not None:
 				try:
 					log_file = open(log_path, 'rb')
 				except IOError:
-					continue
-
-				break
+					pass
 
 			if log_file is not None:
 				try:
@@ -9505,6 +9490,32 @@ class Scheduler(PollScheduler):
 			self._failed_pkgs_die_msgs.append(
 				(mysettings, key, errors))