cit: print to stderr to allow piping from cit log cat.

cit.py

Index: cit.py
diff --git a/cit.py b/cit.py
index aeab2e90c5ccc6af3b4456665ba6d0eef44ebe95..a83caf7a939c621f221fff6229cc6d2903f26b2e 100755
--- a/cit.py
+++ b/cit.py
@@ -56,8 +56,10 @@ def need_to_update(branch):
 
 def ensure_infra(branch):
   """Ensures that infra.git is present in ~/.chrome-infra."""
-  print 'Fetching infra@%s into %s, may take a couple of minutes...' % (
-      branch, TARGET_DIR)
+  sys.stderr.write(

[Ryan Tseng, 2016/06/14 17:41:08]

use print >>sys.stderr, "..."

Either that, or add a newline.  I like using print >> pipe better.

[tandrii(chromium), 2016/06/14 18:09:40]

Actually, the whole reason for using stderr.write is so that I avoid new line. I
wanted to see one line like this:

checking out infra..... done.

+      'Fetching infra@%s into %s, may take a couple of minutes...' % (
+      branch, TARGET_DIR))
+  sys.stderr.flush()
   if not os.path.isdir(TARGET_DIR):
     os.mkdir(TARGET_DIR)
   if not os.path.exists(os.path.join(TARGET_DIR, '.gclient')):
@@ -69,6 +71,8 @@ def ensure_infra(branch):
       [sys.executable, GCLIENT, 'sync', '--revision', 'origin/%s' % (branch,)],
       cwd=TARGET_DIR,
       stdout=subprocess.PIPE)
+  sys.stderr.write(' done.\n')
+  sys.stderr.flush()
 
 
 def get_available_tools():