Fix many* python scripts in src/

printing/cups_config_helper.py

-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """cups-config wrapper.
 
 cups-config, at least on Ubuntu Lucid and Natty, dumps all
 cflags/ldflags/libs when passed the --libs argument.  gyp would like
 to keep these separate: cflags are only needed when compiling files
 that use cups directly, while libs are only needed on the final link
 line.
 
 TODO(evan): remove me once
   https://bugs.launchpad.net/ubuntu/+source/cupsys/+bug/163704
 is fixed.
 """
 
 import subprocess
 import sys
 
 def usage():
-    print 'usage: %s {--cflags|--ldflags|--libs}' % sys.argv[0]
-    sys.exit(1)
+  print 'usage: %s {--cflags|--ldflags|--libs}' % sys.argv[0]
+
 
 def run_cups_config(mode):
-    """Run cups-config with all --cflags etc modes, parse out the mode we want,
-    and return those flags as a list."""
+  """Run cups-config with all --cflags etc modes, parse out the mode we want,
+  and return those flags as a list."""
 
-    cups = subprocess.Popen(['cups-config', '--cflags', '--ldflags', '--libs'],
-                            stdout=subprocess.PIPE)
-    flags = cups.communicate()[0].strip()
+  cups = subprocess.Popen(['cups-config', '--cflags', '--ldflags', '--libs'],
+                          stdout=subprocess.PIPE)
+  flags = cups.communicate()[0].strip()
 
-    flags_subset = []
-    for flag in flags.split():
-        flag_mode = None
-        if flag.startswith('-l'):
-            flag_mode = '--libs'
-        elif (flag.startswith('-L') or flag.startswith('-Wl,')):
-            flag_mode = '--ldflags'
-        elif (flag.startswith('-I') or flag.startswith('-D')):
-            flag_mode = '--cflags'
+  flags_subset = []
+  for flag in flags.split():
+    flag_mode = None
+    if flag.startswith('-l'):
+      flag_mode = '--libs'
+    elif (flag.startswith('-L') or flag.startswith('-Wl,')):
+      flag_mode = '--ldflags'
+    elif (flag.startswith('-I') or flag.startswith('-D')):
+      flag_mode = '--cflags'
 
-        # Be conservative: for flags where we don't know which mode they
-        # belong in, always include them.
-        if flag_mode is None or flag_mode == mode:
-            flags_subset.append(flag)
+    # Be conservative: for flags where we don't know which mode they
+    # belong in, always include them.
+    if flag_mode is None or flag_mode == mode:
+      flags_subset.append(flag)
 
-    return flags_subset
+  return flags_subset
 
-if len(sys.argv) != 2:
+
+def main():
+  if len(sys.argv) != 2:
     usage()
+    return 1
 
-mode = sys.argv[1]
-if mode not in ('--cflags', '--libs', '--ldflags'):
+  mode = sys.argv[1]
+  if mode not in ('--cflags', '--libs', '--ldflags'):
     usage()
-flags = run_cups_config(mode)
-print ' '.join(flags)
+    return 1
+  flags = run_cups_config(mode)
+  print ' '.join(flags)
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())