Initial implementation of WebUI generator (WUG) toolkit.

components/webui_generator/generator/build_helper.py

Index: components/webui_generator/generator/build_helper.py
diff --git a/components/webui_generator/generator/build_helper.py b/components/webui_generator/generator/build_helper.py
new file mode 100644
index 0000000000000000000000000000000000000000..06232e66c7f3d1f1824de48596dd53eafe360e46
--- /dev/null
+++ b/components/webui_generator/generator/build_helper.py
@@ -0,0 +1,69 @@
+# Copyright 2015 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.
+
+# Provides various information needed for GYP and GN to generate and build
+# files.
+
+import os
+import sys
+
+from declaration import Declaration
+import export_h
+import util
+import view_model
+import web_ui_view
+
+def GetImportDependencies(declaration):
+  return set(child.build_target for child in declaration.children.itervalues())
+
+parser = util.CreateArgumentParser()
+parser.add_argument('--output',
+                    choices=['view_cc', 'view_h', 'model_cc', 'model_h',
+                             'export_h', 'dirname', 'target_name', 'imports',
+                             'impl_macro', 'import_dependencies',
+                             'list_outputs'],
+                    required=True,
+                    help='Type of output')
+parser.add_argument('--gn', action='store_true',
+                    help='Is called by GN')
+args = parser.parse_args()
+declaration_path = os.path.relpath(args.declaration, args.root)
+os.chdir(args.root)
+try:
+  declaration = Declaration(declaration_path)
+except Exception as e:
+  print >> sys.stderr, e.message
+  sys.exit(1)
+
+if args.output == 'view_cc':
+  print declaration.webui_view_cc_name
+elif args.output == 'view_h':
+  print declaration.webui_view_h_name
+elif args.output == 'model_cc':
+  print declaration.view_model_cc_name
+elif args.output == 'model_h':
+  print declaration.view_model_h_name
+elif args.output == 'export_h':
+  print declaration.export_h_name
+elif args.output == 'dirname':
+  print os.path.dirname(declaration_path)
+elif args.output == 'target_name':
+  print declaration.build_target
+elif args.output == 'imports':
+  for i in declaration.imports:
+    print '//' + i
+elif args.output == 'import_dependencies':
+  for d in GetImportDependencies(declaration):
+    print (':' if args.gn else '') + d
+elif args.output == 'list_outputs':
+  outputs = web_ui_view.ListOutputs(declaration, args.destination) + \
+            view_model.ListOutputs(declaration, args.destination) + \
+            export_h.ListOutputs(declaration, args.destination)
+  for output in outputs:
+    print output
+elif args.output == 'impl_macro':
+  print declaration.component_impl_macro
+else:
+  assert False
+