Suppress output from generate_stubs on success

Avoids printing this every build:

[8079->2182/10278 ~17] RULE Generating FFmpeg import libraries.
   Creating library ..\..\out\Debug\lib\avutil-51.lib and object ..\..\out\Debug\lib\avutil-51.exp
[8075->2186/10278 ~17] RULE Generating FFmpeg import libraries.
   Creating library ..\..\out\Debug\lib\avcodec-54.lib and object ..\..\out\Debug\lib\avcodec-54.exp
[8072->2189/10278 ~17] RULE Generating FFmpeg import libraries.
   Creating library ..\..\out\Debug\lib\avformat-54.lib and object ..\..\out\Debug\lib\avformat-54.exp

BUG=126483
R=thakis@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10432002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138655 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 3 deletions

diff --git a/tools/generate_stubs/generate_stubs.py b/tools/generate_stubs/generate_stubs.py
index 61d606b..424d24f 100755
--- a/tools/generate_stubs/generate_stubs.py
+++ b/tools/generate_stubs/generate_stubs.py
@@ -36,6 +36,7 @@ import os
 import re
 import string
 import subprocess
+import sys
 
 
 class Error(Exception):
@@ -439,6 +440,17 @@ def WriteWindowsDefFile(module_name, signatures, outfile):
     outfile.write('  %s\n' % sig['name'])
 
 
+def QuietRun(args, filter=None, write_to=sys.stdout):
+  """Invoke |args| as command via subprocess.Popen, filtering lines starting
+  with |filter|."""
+  popen = subprocess.Popen(args, stdout=subprocess.PIPE)
+  out, _ = popen.communicate()
+  for line in out.splitlines():
+    if not filter or not line.startswith(filter):
+      write_to.write(line + '\n')
+  return popen.returncode
+
+
 def CreateWindowsLib(module_name, signatures, intermediate_dir, outdir_path):
   """Creates a windows library file.
 
@@ -470,9 +482,10 @@ def CreateWindowsLib(module_name, signatures, intermediate_dir, outdir_path):
   # Invoke the "lib" program on Windows to create stub .lib files for the
   # generated definitions.  These .lib files can then be used during
   # delayloading of the dynamic libraries.
-  ret = subprocess.call(['lib', '/nologo', '/machine:X86',
-                         '/def:' + def_file_path,
-                         '/out:' + lib_file_path])
+  ret = QuietRun(['lib', '/nologo', '/machine:X86',
+                  '/def:' + def_file_path,
+                  '/out:' + lib_file_path],
+                 filter='   Creating library')
   if ret != 0:
     raise SubprocessError(
         'Failed creating %s for %s' % (lib_file_path, def_file_path),