Initial commit of the Dart Chrome Extension APIs generators

tools/json_schema_compiler/compiler.py

Index: tools/json_schema_compiler/compiler.py
diff --git a/tools/json_schema_compiler/compiler.py b/tools/json_schema_compiler/compiler.py
index a270756bf31bd127fa8d4a7203d44fad1b1dc94a..ef01c010fdb77fe12056568e0b15a643a85b7532 100755
--- a/tools/json_schema_compiler/compiler.py
+++ b/tools/json_schema_compiler/compiler.py
@@ -19,6 +19,7 @@ Usage example:
 import cc_generator
 import cpp_type_generator
 import h_generator
+import dart_generator
 import idl_schema
 import json_schema
 import model
@@ -28,6 +29,15 @@ import optparse
 import os.path
 import sys
 
+# List of supported languages to build; first is default.
+SUPPORTED_LANGS = ['c++', 'dart']
+
+# For each language, the corresponding "ignore string" to remove that node from
+# the returned namespace.
+NODE_IGNORE_STR = {
+  'c++': 'nocompile',
+}
+
 def load_schema(schema):
   schema_filename, schema_extension = os.path.splitext(schema)
 
@@ -36,19 +46,22 @@ def load_schema(schema):
   elif schema_extension == '.idl':
     api_defs = idl_schema.Load(schema)
   else:
-    sys.exit("Did not recognize file extension %s for schema %s" %
+    sys.exit('Did not recognize file extension %s for schema %s' %
              (schema_extension, schema))
   if len(api_defs) != 1:
-    sys.exit("File %s has multiple schemas. Files are only allowed to contain a"
-             " single schema." % schema)
+    sys.exit('File %s has multiple schemas. Files are only allowed to contain a'
+             ' single schema.' % schema)
 
   return api_defs
 
-def handle_single_schema(filename, dest_dir, root, root_namespace):
+def handle_single_schema(filename, dest_dir, root, root_namespace, lang,
+    dart_overrides_dir):
   schema = os.path.normpath(filename)
   schema_filename, schema_extension = os.path.splitext(schema)
   path, short_filename = os.path.split(schema_filename)
-  api_defs = json_schema.DeleteNocompileNodes(load_schema(schema))
+  api_defs = load_schema(schema)
+  if lang in NODE_IGNORE_STR:
+    api_defs = json_schema.DeleteNodes(api_defs, NODE_IGNORE_STR[lang])
 
   api_model = model.Model()
 
@@ -83,45 +96,63 @@ def handle_single_schema(filename, dest_dir, root, root_namespace):
       continue
 
     if short_filename != namespace.unix_name:
-      sys.exit("Filename %s is illegal. Name files using unix_hacker style." %
+      sys.exit('Filename %s is illegal. Name files using unix_hacker style.' %
                filename)
 
     # The output filename must match the input filename for gyp to deal with it
     # properly.
     out_file = namespace.unix_name
-    type_generator = cpp_type_generator.CppTypeGenerator(
-        root_namespace, namespace, namespace.unix_name)
-    for referenced_namespace in api_model.namespaces.values():
-      if referenced_namespace == namespace:
-        continue
-      type_generator.AddNamespace(
-          referenced_namespace,
-          referenced_namespace.unix_name)
 
-    h_code = (h_generator.HGenerator(namespace, type_generator)
-        .Generate().Render())
-    cc_code = (cc_generator.CCGenerator(namespace, type_generator)
-        .Generate().Render())
+    if lang.lower() == 'c++':
+      type_generator = cpp_type_generator.CppTypeGenerator(
+          root_namespace, namespace, namespace.unix_name)
+      for referenced_namespace in api_model.namespaces.values():
+        if referenced_namespace == namespace:
+          continue
+        type_generator.AddNamespace(
+            referenced_namespace,
+            referenced_namespace.unix_name)
+
+      h_code = (h_generator.HGenerator(namespace, type_generator)
+          .Generate().Render())
+      cc_code = (cc_generator.CCGenerator(namespace, type_generator)
+          .Generate().Render())
+
+      if dest_dir:
+        with open(
+            os.path.join(dest_dir, namespace.source_file_dir, out_file + '.cc'),
+            'w') as cc_file:
+          cc_file.write(cc_code)
+        with open(
+            os.path.join(dest_dir, namespace.source_file_dir, out_file + '.h'),
+            'w') as h_file:
+          h_file.write(h_code)
+      else:
+        print '%s.h' % out_file
+        print
+        print h_code
+        print
+        print '%s.cc' % out_file
+        print
+        print cc_code
+
+    elif lang.lower() == 'dart':
+      dart_code = (dart_generator.DartGenerator(namespace, dart_overrides_dir)
+          .Generate().Render())
+
+      if dest_dir:
+        with open(os.path.join(dest_dir, out_file + '.dart'), 'w') as dart_file:
+          dart_file.write(dart_code)
+      else:
+        print '%s.dart' % out_file
+        print
+        print dart_code
 
-    if dest_dir:
-      with open(
-          os.path.join(dest_dir, namespace.source_file_dir, out_file + '.cc'),
-          'w') as cc_file:
-        cc_file.write(cc_code)
-      with open(
-          os.path.join(dest_dir, namespace.source_file_dir, out_file + '.h'),
-          'w') as h_file:
-        h_file.write(h_code)
     else:
-      print '%s.h' % out_file
-      print
-      print h_code
-      print
-      print '%s.cc' % out_file
-      print
-      print cc_code
+      raise Exception('Unrecognised language %s. Supported languages are %s.' %
+        (lang, SUPPORTED_LANGS))
 
-def handle_bundle_schema(filenames, dest_dir, root, root_namespace):
+def handle_bundle_schema(filenames, dest_dir, root, root_namespace, lang):
   # Merge the source files into a single list of schemas.
   api_defs = []
   for filename in filenames:
@@ -143,41 +174,49 @@ def handle_bundle_schema(filenames, dest_dir, root, root_namespace):
     # generate because the gyp uses the names of the JSON files to generate
     # the names of the .cc and .h files. We want these to be using unix_names.
     if namespace.unix_name != short_filename:
-      sys.exit("Filename %s is illegal. Name files using unix_hacker style." %
+      sys.exit('Filename %s is illegal. Name files using unix_hacker style.' %
                schema_filename)
 
-  type_generator = cpp_type_generator.CppTypeGenerator(root_namespace)
-  for referenced_namespace in api_model.namespaces.values():
-    type_generator.AddNamespace(
-        referenced_namespace,
-        referenced_namespace.unix_name)
-
-  generator = schema_bundle_generator.SchemaBundleGenerator(
-      root, api_model, api_defs, type_generator)
-  api_h_code = generator.GenerateAPIHeader().Render()
-  schemas_h_code = generator.GenerateSchemasHeader().Render()
-  schemas_cc_code = generator.GenerateSchemasCC().Render()
-
-  if dest_dir:
-    basedir = os.path.join(dest_dir, 'chrome/common/extensions/api')
-    with open(os.path.join(basedir, 'generated_api.h'), 'w') as h_file:
-      h_file.write(api_h_code)
-    with open(os.path.join(basedir, 'generated_schemas.h'), 'w') as h_file:
-      h_file.write(schemas_h_code)
-    with open(os.path.join(basedir, 'generated_schemas.cc'), 'w') as cc_file:
-      cc_file.write(schemas_cc_code)
+  if lang == 'c++':
+    type_generator = cpp_type_generator.CppTypeGenerator(root_namespace)
+    for referenced_namespace in api_model.namespaces.values():
+      type_generator.AddNamespace(
+          referenced_namespace,
+          referenced_namespace.unix_name)
+
+    generator = schema_bundle_generator.SchemaBundleGenerator(
+        root, api_model, api_defs, type_generator)
+    api_h_code = generator.GenerateAPIHeader().Render()
+    schemas_h_code = generator.GenerateSchemasHeader().Render()
+    schemas_cc_code = generator.GenerateSchemasCC().Render()
+
+    if dest_dir:
+      basedir = os.path.join(dest_dir, 'chrome/common/extensions/api')
+      with open(os.path.join(basedir, 'generated_api.h'), 'w') as h_file:
+        h_file.write(api_h_code)
+      with open(os.path.join(basedir, 'generated_schemas.h'), 'w') as h_file:
+        h_file.write(schemas_h_code)
+      with open(os.path.join(basedir, 'generated_schemas.cc'), 'w') as cc_file:
+        cc_file.write(schemas_cc_code)
+    else:
+      print 'generated_api.h'
+      print
+      print api_h_code
+      print
+      print 'generated_schemas.h'
+      print
+      print schemas_h_code
+      print
+      print 'generated_schemas.cc'
+      print
+      print schemas_cc_code
+
+  elif lang == 'dart':
+    raise Exception('Dart is not supported in bundle mode.')
+
   else:
-    print 'generated_api.h'
-    print
-    print api_h_code
-    print
-    print 'generated_schemas.h'
-    print
-    print schemas_h_code
-    print
-    print 'generated_schemas.cc'
-    print
-    print schemas_cc_code
+    raise Exception("Unrecognised language %s. Supported languages are %s." %
+                    (lang, SUPPORTED_LANG))
 
 if __name__ == '__main__':
   parser = optparse.OptionParser(
@@ -190,9 +229,15 @@ if __name__ == '__main__':
       help='root directory to output generated files.')
   parser.add_option('-n', '--namespace', default='generated_api_schemas',
       help='C++ namespace for generated files. e.g extensions::api.')
-  parser.add_option('-b', '--bundle', action="store_true", help=
+  parser.add_option('-b', '--bundle', action='store_true', help=
 '''if supplied, causes compiler to generate bundle files for the given set of
 source files.''')
+  parser.add_option('-l', '--lang', default=SUPPORTED_LANGS[0],
+      help=
+'''The language to generate the output in. Currently supported options are
+%s.''' % SUPPORTED_LANGS)
+  parser.add_option('-D', '--custom-dart-folder', dest='dart_overrides_dir',
+      help='Adds custom dart from files in the given folder (Dart only).')
 
   (opts, args) = parser.parse_args()
 
@@ -202,6 +247,7 @@ source files.''')
   root_namespace = opts.namespace
 
   if opts.bundle:
-    handle_bundle_schema(args, dest_dir, opts.root, root_namespace)
+    handle_bundle_schema(args, dest_dir, opts.root, root_namespace, opts.lang)
   else:
-    handle_single_schema(args[0], dest_dir, opts.root, root_namespace)
+    handle_single_schema(args[0], dest_dir, opts.root, root_namespace,
+        opts.lang, opts.dart_overrides_dir)