[buildinstall] Add more debugging output

When it fails, a traceback will be printed.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

pungi/phases/buildinstall.py

@@ -22,6 +22,7 @@ import pipes
 import tempfile
 import shutil
 import re
+import traceback
 
 from kobo.threads import ThreadPool, WorkerThread
 from kobo.shortcuts import run
@@ -386,9 +387,11 @@ class BuildinstallThread(WorkerThread):
             if not compose.can_fail(variant, arch, 'buildinstall'):
                 raise
             else:
+                tb = traceback.format_exc()
                 self.pool.log_info(
                     '[FAIL] Buildinstall for variant %s arch %s failed, but going on anyway.\n%s'
                     % (variant.uid if variant else 'None', arch, exc))
+                self.pool.log_debug(tb)
 
     def worker(self, compose, arch, variant, cmd, num):
         runroot = compose.conf.get("runroot", False)

pungi/wrappers/kojiwrapper.py

@@ -86,7 +86,7 @@ class KojiWrapper(object):
         contains the id, it will be captured and returned.
         """
         task_id = None
-        retcode, output = run(command, can_fail=True, logfile=log_file)
+        retcode, output = run(command, can_fail=True, logfile=log_file, show_cmd=True)
         if "--task-id" in command:
             first_line = output.splitlines()[0]
             if re.match(r'^\d+$', first_line):