Python 3 compatibility

pylib/gyp/generator/cmake.py

Index: pylib/gyp/generator/cmake.py
diff --git a/pylib/gyp/generator/cmake.py b/pylib/gyp/generator/cmake.py
index a2b96291aa526aa5c93d1ecef687c70806872f53..f42defb6ccb56caec0f894900737afa632a10f1e 100644
--- a/pylib/gyp/generator/cmake.py
+++ b/pylib/gyp/generator/cmake.py
@@ -28,6 +28,8 @@ not be able to find the header file directories described in the generated
 CMakeLists.txt file.
 """
 
+from __future__ import print_function
+
 import multiprocessing
 import os
 import signal
@@ -36,6 +38,12 @@ import subprocess
 import gyp.common
 import gyp.xcode_emulation
 
+try:
+  string.maketrans
+except NameError:
+  # maketrans was moved to str in python 3
+  string.maketrans = str.maketrans
+
 generator_default_variables = {
   'EXECUTABLE_PREFIX': '',
   'EXECUTABLE_SUFFIX': '',
@@ -868,8 +876,8 @@ def WriteTarget(namer, qualified_target, target_dicts, build_dir, config_to_use,
       default_product_ext = generator_default_variables['SHARED_LIB_SUFFIX']
 
     elif target_type != 'executable':
-      print ('ERROR: What output file should be generated?',
-              'type', target_type, 'target', target_name)
+      print(('ERROR: What output file should be generated?',
+              'type', target_type, 'target', target_name))
 
     product_prefix = spec.get('product_prefix', default_product_prefix)
     product_name = spec.get('product_name', default_product_name)
@@ -1207,11 +1215,11 @@ def PerformBuild(data, configurations, params):
                                               output_dir,
                                               config_name))
     arguments = ['cmake', '-G', 'Ninja']
-    print 'Generating [%s]: %s' % (config_name, arguments)
+    print('Generating [%s]: %s' % (config_name, arguments))
     subprocess.check_call(arguments, cwd=build_dir)
 
     arguments = ['ninja', '-C', build_dir]
-    print 'Building [%s]: %s' % (config_name, arguments)
+    print('Building [%s]: %s' % (config_name, arguments))
     subprocess.check_call(arguments)
 
 
@@ -1230,7 +1238,7 @@ def GenerateOutput(target_list, target_dicts, data, params):
     GenerateOutputForConfig(target_list, target_dicts, data,
                             params, user_config)
   else:
-    config_names = target_dicts[target_list[0]]['configurations'].keys()
+    config_names = target_dicts[target_list[0]]['configurations']
     if params['parallel']:
       try:
         pool = multiprocessing.Pool(len(config_names))
@@ -1239,7 +1247,7 @@ def GenerateOutput(target_list, target_dicts, data, params):
           arglists.append((target_list, target_dicts, data,
                            params, config_name))
           pool.map(CallGenerateOutputForConfig, arglists)
-      except KeyboardInterrupt, e:
+      except KeyboardInterrupt as e:
         pool.terminate()
         raise e
     else: