Policy: generate boilerplate policy type and constant code.

chrome/tools/build/generate_policy_source.py

Index: chrome/tools/build/generate_policy_source.py
diff --git a/chrome/tools/build/generate_policy_source.py b/chrome/tools/build/generate_policy_source.py
new file mode 100644
index 0000000000000000000000000000000000000000..1051092ece054d10ab6d4524bdecdef07fd38091
--- /dev/null
+++ b/chrome/tools/build/generate_policy_source.py
@@ -0,0 +1,142 @@
+#!/usr/bin/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.
+
+'''python %prog [options] platform template
+
+platform specifies which platform source is being generated for
+  and can be one of (win, mac, linux).
+template is the path to a .json policy template file.'''
+
+from __future__ import with_statement
+from optparse import OptionParser
+import sys;
+
+
+CHROME_SUBKEY = 'SOFTWARE\\\\Policies\\\\Google\\\\Chrome';
+CHROMIUM_SUBKEY = 'SOFTWARE\\\\Policies\\\\Chromium';
+
+
+def main():
+  parser = OptionParser(usage=__doc__);
+  parser.add_option("--pch", "--policy-constants-header", dest="header_path",
+                    help="generate header file of policy constants",
+                    metavar="FILE");
+  parser.add_option("--pcc", "--policy-constants-source", dest="source_path",
+                    help="generate source file of policy constants",
+                    metavar="FILE");
+  parser.add_option("--pth", "--policy-type-header", dest="type_path",
+                    help="generate header file for policy type enumeration",
+                    metavar="FILE");
+
+  (opts, args) = parser.parse_args();
+
+  if len(args) < 2 or len(args) > 2:
+    print "exactly one platform and input file must be specified."
+    parser.print_help()
+    sys.exit(2)
+  template_file_contents = _LoadJSONFile(args[1]);
+  if opts.header_path is not None:
+    _WritePolicyConstantHeader(template_file_contents,
+                               args,
+                               opts);
+  if opts.source_path is not None:
+    _WritePolicyConstantSource(template_file_contents,
+                               args,
+                               opts);
+  if opts.type_path is not None:
+    _WritePolicyTypeEnumerationHeader(template_file_contents,
+                                      args,
+                                      opts);
+
+
+def _OutputGeneratedWarningForC(f, template_file_path):
+    f.write('//\n'
+            '// DO NOT MODIFY THIS FILE DIRECTLY!\n'
+            '// IT IS GENERATED BY generate_policy_source.py\n'
+            '// FROM ' + template_file_path + ' \n'
+            '//\n\n')
+
+
+def _WritePolicyConstantHeader(template_file_contents, args, opts):
+  platform = args[0];
+  with open(opts.header_path, "w") as f:
+    _OutputGeneratedWarningForC(f, args[1])
+    f.write('#ifndef CHROME_COMMON_POLICY_CONSTANTS_H_\n'
+            '#define CHROME_COMMON_POLICY_CONSTANTS_H_\n'
+            '#pragma once\n'
+            '\n'
+            'namespace policy {\n\n')
+    if platform == "win":
+      f.write('// The windows registry path where policy configuration '
+              'resides.\nextern const wchar_t kRegistrySubKey[];\n\n')
+    f.write('// Key names for the policy settings.\n'
+            'namespace key {\n\n')
+    for policy_name in _GetPolicyNameList(template_file_contents):
+      f.write('extern const char k' + policy_name + '[];\n')
+    f.write('\n}  // namespace key\n\n'
+            '}  // namespace policy\n\n'
+            '#endif  // CHROME_COMMON_POLICY_CONSTANTS_H_\n')
+
+
+def _WritePolicyConstantSource(template_file_contents, args, opts):
+  platform = args[0];
+  with open(opts.source_path, "w") as f:
+    _OutputGeneratedWarningForC(f, args[1])
+    f.write('#include "policy/policy_constants.h"\n'
+            '\n'
+            'namespace policy {\n'
+            '\n')
+    if platform == "win":
+      f.write('#if defined(GOOGLE_CHROME_BUILD)\n'
+              'const wchar_t kRegistrySubKey[] = '
+              'L"' + CHROME_SUBKEY + '";\n'
+              '#else\n'
+              'const wchar_t kRegistrySubKey[] = '
+              'L"' + CHROMIUM_SUBKEY + '";\n'
+              '#endif\n\n')
+    f.write('namespace key {\n\n')
+    for policy_name in _GetPolicyNameList(template_file_contents):
+      f.write('const char k%s[] = "%s";\n' % (policy_name, policy_name))
+    f.write('\n}  // namespace key\n\n'
+            '}  // namespace policy\n')
+
+
+def _WritePolicyTypeEnumerationHeader(template_file_contents, args, opts):
+  with open(opts.type_path, "w") as f:
+    _OutputGeneratedWarningForC(f, args[1])
+    f.write('#ifndef CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_TYPE_H_\n'
+            '#define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_TYPE_H_\n'
+            '#pragma once\n'
+            '\n'
+            'namespace policy {\n'
+            '\n'
+            'enum ConfigurationPolicyType {\n')
+    for policy_name in _GetPolicyNameList(template_file_contents):
+      f.write('  kPolicy' + policy_name + ",\n");
+    f.write('};\n\n'
+            '}  // namespace policy\n\n'
+            '#endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_TYPE_H_\n')
+
+
+def _GetPolicyNameList(template_file_contents):
+  policy_names = [];
+  for policy in template_file_contents['policy_definitions']:
+    if policy['type'] == 'group':
+      for sub_policy in policy['policies']:
+        policy_names.append(sub_policy['name'])
+    else:
+      policy_names.append(policy['name'])
+  policy_names.sort()
+  return policy_names
+
+
+def _LoadJSONFile(json_file):
+  with open(json_file, "r") as f:
+    text = f.read()
+  return eval(text)
+
+
+if __name__ == '__main__':
+  main();