Add service_test GN template

services/catalog/public/tools/sourcify_manifest.py

+#!/usr/bin/env python
+# Copyright 2017 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.
+
+"""Generates a C++ source file which defines a string constant containing the
+contents of a catalog manifest file. Useful for baking catalogs into binaries
+which don't want to hit disk before initializing the catalog."""
+
+import argparse
+import json
+import os.path
+import sys
+
+
+# Token used to delimit raw strings in the generated source file. It's illegal
+# for this token to appear within the contents of the input manifest itself.
+_RAW_STRING_DELIMITER = "#CATALOG_JSON#"
+
+
+def main():
+  parser = argparse.ArgumentParser(
+      description="Generates a C++ constant containing a catalog manifest.")
+  parser.add_argument("--input")
+  parser.add_argument("--output")
+  parser.add_argument("--symbol-name")
+  parser.add_argument("--pretty", action="store_true")
+  args, _ = parser.parse_known_args()
+
+  if args.input is None or args.output is None or args.symbol_name is None:
+    raise Exception("--input, --output, and --symbol-name are required")
+
+  with open(args.input, 'r') as input_file:
+    manifest_contents = input_file.read()
+
+  if manifest_contents.find(_RAW_STRING_DELIMITER) >= 0:
+    raise Exception(
+        "Unexpected '%s' found in input manifest." % _RAW_STRING_DELIMITER)
+
+  qualified_symbol_name = args.symbol_name.split("::")
+  namespace = qualified_symbol_name[0:-1]
+  symbol_name = qualified_symbol_name[-1]
+
+  with open(args.output, 'w') as output_file:
+    output_file.write(
+        "// This is a generated file produced by\n"
+        "// src/services/catalog/public/tools/sourcify_manifest.py.\n\n")
+    for name in namespace:
+      output_file.write("namespace %s {\n" % name)
+    output_file.write("\nextern const char %s[];" % symbol_name)
+    output_file.write("\nconst char %s[] = R\"%s(%s)%s\";\n\n" %
+        (symbol_name, _RAW_STRING_DELIMITER, manifest_contents,
+            _RAW_STRING_DELIMITER))
+    for name in reversed(namespace):
+      output_file.write("}  // %s\n" % name)
+
+  return 0
+
+if __name__ == "__main__":
+  sys.exit(main())