gather: Print profiling information to stderr

On stdout it gets mixed with listing of gathered packages. This has no
effect in a real pungi-koji run, where both streams are merged into a
single file which is then parsed, but in manual debugging runs it's a
little obnoxious.

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

bin/pungi-gather

@@ -3,8 +3,9 @@
 
 from __future__ import print_function
 
-import os
 import argparse
+import os
+import sys
 
 import pungi.ks
 from pungi.dnf_wrapper import DnfWrapper, Conf
@@ -142,7 +143,7 @@ def main(persistdir, cachedir):
     else:
         print_rpms(g)
     if ns.profiler:
-        Profiler.print_results()
+        Profiler.print_results(stream=sys.stderr)
 
 
 def _get_flags(gather_obj, pkg):

pungi/profiler.py

@@ -40,6 +40,7 @@ from __future__ import print_function
 
 
 import functools
+import sys
 import time
 
 
@@ -66,9 +67,10 @@ class Profiler(object):
         return decorated
 
     @classmethod
-    def print_results(cls):
-        print("Profiling results:")
+    def print_results(cls, stream=sys.stdout):
+        print("Profiling results:", file=sys.stdout)
         results = cls._data.items()
         results = sorted(results, key=lambda x: x[1]["time"], reverse=True)
         for name, data in results:
-            print("  %6.2f %5d %s" % (data["time"], data["calls"], name))
+            print("  %6.2f %5d %s" % (data["time"], data["calls"], name),
+                  file=sys.stdout)