Code generation for extensions api

This is a preliminary code review for a code generator. The tool's purpose is to generate the tedious serialization code that needs to be written when defining a new extensions api. It generates from the json files in chrome/common/extensions/api.

As an example usage, chrome/browser/extensions/extension_permissions_api.cc has been changed to use a class generated from permissions.json.

The tool has been integrated into the build system and generates compiling and working code (for permissions.json at least)

BUG=
TEST=


Review URL: http://codereview.chromium.org/9114036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119405 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 59 insertions, 0 deletions

diff --git a/build/json_schema_compile.gypi b/build/json_schema_compile.gypi
new file mode 100644
index 0000000..940e65c
--- /dev/null
+++ b/build/json_schema_compile.gypi
@@ -0,0 +1,59 @@
+# Copyright (c) 2012 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.
+
+{
+  'variables': {
+    # When including this gypi, the following variables must be set:
+    #   json_schema_files: an array of json files that comprise the api model.
+    #   cc_dir: path to generated files
+    #   root_namespace: the C++ namespace that all generated files go under
+    'api_gen_dir': '<(DEPTH)/tools/json_schema_compiler',
+    'api_gen': '<(api_gen_dir)/compiler.py',
+  },
+  'rules': [
+    {
+      'rule_name': 'genapi',
+      'extension': 'json',
+      'inputs': [
+        '<(api_gen_dir)/code.py',
+        '<(api_gen_dir)/compiler.py',
+        '<(api_gen_dir)/model.py',
+        '<(api_gen_dir)/cc_generator.py',
+        '<(api_gen_dir)/h_generator.py',
+        '<(api_gen_dir)/cpp_type_generator.py',
+        '<@(json_schema_files)',
+      ],
+      'outputs': [
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).cc',
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).h',
+      ],
+      'action': [
+        'python',
+        '<(api_gen)',
+        '<(RULE_INPUT_PATH)',
+        '--root=<(DEPTH)',
+        '--destdir=<(SHARED_INTERMEDIATE_DIR)',
+        '--namespace=<(root_namespace)',
+        '<@(json_schema_files)',
+      ],
+      'message': 'Generating C++ code from <(RULE_INPUT_PATH) jsons',
+      'process_outputs_as_sources': 1,
+    },
+  ],
+  'include_dirs': [
+    '<(SHARED_INTERMEDIATE_DIR)',
+    '<(DEPTH)',
+  ],
+  'dependencies':[
+    '<(DEPTH)/tools/json_schema_compiler/api_gen_util.gyp:api_gen_util',
+  ],
+  'direct_dependent_settings': {
+    'include_dirs': [
+      '<(SHARED_INTERMEDIATE_DIR)',
+    ]
+  },
+  # This target exports a hard dependency because it generates header
+  # files.
+  'hard_dependency': 1,
+}