ninja windows: Support magic idl build rules

pylib/gyp/win_tool.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Utility functions for Windows builds.
 
 These functions are executed via gyp-win-tool when using the ninja generator.
 """
@@ skipping 46 matching lines @@
     """
     popen = subprocess.Popen(args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT)
     out, _ = popen.communicate()
     for line in out.splitlines():
       if not line.startswith('   Creating library '):
         sys.stdout.write(line)
     return popen.returncode
 
+  def ExecMidlWrapper(self, outdir, tlb, h, dlldata, iid, proxy, idl, *flags):
+    """Filter noisy filenames output from MIDL compile step that isn't
+    quietable via command line flags.
+    """
+    args = ['midl', '/nologo'] + list(flags) + [
+        '/out', outdir,
+        '/tlb', tlb,
+        '/h', h,
+        '/dlldata', dlldata,
+        '/iid', iid,
+        '/proxy', proxy,
+        idl]
+    popen = subprocess.Popen(args,

[Nico, 2012/04/05 04:37:11]

nit: if you break after (, the rest might all fit on one line

[scottmg, 2012/04/05 17:52:42]

Done. (and above)

+                             shell=True,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.STDOUT)
+    out, _ = popen.communicate()
+    # Filter junk out of stdout, and write filtered versions. Output we want
+    # to filter is pairs of lines that look like this:
+    # Processing C:\Program Files (x86)\Microsoft SDKs\...\include\objidl.idl
+    # objidl.idl
+    lines = out.splitlines()
+    prefix = 'Processing '
+    processings = [os.path.basename(x) for x in lines if x.startswith(prefix)]

[Nico, 2012/04/05 04:37:11]

:-D

Do wrap this in a set(), just in case the output gets long. (The os x terminal
has a O(n^2) in line length when you paste something in, and i hate that. that's
probably there because someone thought 'eh, n is usually small' too.)

[scottmg, 2012/04/05 17:52:42]

Done.

+    for line in lines:
+      if not line.startswith(prefix) and x not in processings:
+        sys.stdout.write(line)
+    return popen.returncode
+
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))