def testEnsureDirectoryExists(self):
"""Test that EnsureDirectoryExists fuctions correctly."""
temp_dir = tempfile.mkdtemp()
try:
self.assertTrue(os.path.exists(temp_dir))
# Directory does not exist, yet.
full = os.path.join(temp_dir, "foo", "bar")
self.assertFalse(os.path.exists(full))
# Create the directory.
fileutil.EnsureDirectoryExists(full)
self.assertTrue(os.path.exists(full))
# Trying to create it again does not cause an error.
fileutil.EnsureDirectoryExists(full)
self.assertTrue(os.path.exists(full))
# Bypass check for directory existence to tickle error handling that
# occurs in response to a race.
fileutil.EnsureDirectoryExists(full, always_try_to_create=True)
self.assertTrue(os.path.exists(full))
finally:
shutil.rmtree(temp_dir)
def _DoGenerateFiles(self):
fileutil.EnsureDirectoryExists(self.output_dir)
for struct in self.module.structs:
self.WriteWithComment(self._GenerateStructSource(struct),
'%s.java' % GetNameForElement(struct))
for union in self.module.unions:
self.WriteWithComment(self._GenerateUnionSource(union),
'%s.java' % GetNameForElement(union))
for enum in self.module.enums:
self.WriteWithComment(self._GenerateEnumSource(enum),
'%s.java' % GetNameForElement(enum))
for interface in self.module.interfaces:
self.WriteWithComment(self._GenerateInterfaceSource(interface),
'%s.java' % GetNameForElement(interface))
self.WriteWithComment(
self._GenerateInterfaceInternalSource(interface),
'%s_Internal.java' % GetNameForElement(interface))
if self.module.constants:
self.WriteWithComment(
self._GenerateConstantsSource(self.module),
'%s.java' % GetConstantsMainEntityName(self.module))
def _Generate(args, remaining_args):
if args.variant == "none":
args.variant = None
for idx, import_dir in enumerate(args.import_directories):
tokens = import_dir.split(":")
if len(tokens) >= 2:
args.import_directories[idx] = RelativePath(tokens[0], tokens[1])
else:
args.import_directories[idx] = RelativePath(tokens[0], args.depth)
generator_modules = LoadGenerators(args.generators_string)
fileutil.EnsureDirectoryExists(args.output_dir)
processor = MojomProcessor(lambda filename: filename in args.filename)
processor.LoadTypemaps(set(args.typemaps))
for filename in args.filename:
processor.ProcessFile(args, remaining_args, generator_modules,
filename)
if args.depfile:
assert args.depfile_target
with open(args.depfile, 'w') as f:
f.write('%s: %s' % (args.depfile_target, ' '.join(
processor._parsed_files.keys())))
return 0
def _VerifyImportDeps(args, __):
fileutil.EnsureDirectoryExists(args.gen_dir)
for filename in args.filename:
rel_path = RelativePath(filename, args.depth)
tree = _UnpickleAST(_GetPicklePath(rel_path, args.gen_dir))
mojom_imports = set(parsed_imp.import_filename
for parsed_imp in tree.import_list)
# read the paths from the file
f_deps = open(args.deps_file, 'r')
deps_sources = set()
for deps_path in f_deps:
deps_path = deps_path.rstrip('\n')
f_sources = open(deps_path, 'r')
for source_file in f_sources:
source_dir = deps_path.split(args.gen_dir + "/", 1)[1]
full_source_path = os.path.dirname(source_dir) + "/" + \
source_file
deps_sources.add(full_source_path.rstrip('\n'))
if (not deps_sources.issuperset(mojom_imports)):
print ">>> [%s] Missing dependencies for the following imports: %s" % ( \
args.filename[0], \
list(mojom_imports.difference(deps_sources)))
sys.exit(1)
source_filename, _ = os.path.splitext(rel_path.relative_path())
output_file = source_filename + '.v'
output_file_path = os.path.join(args.gen_dir, output_file)
WriteFile("", output_file_path)
return 0
def _Generate(args, remaining_args):
if args.variant == "none":
args.variant = None
for idx, import_dir in enumerate(args.import_directories):
tokens = import_dir.split(":")
if len(tokens) >= 2:
args.import_directories[idx] = RelativePath(tokens[0], tokens[1])
else:
args.import_directories[idx] = RelativePath(tokens[0], args.depth)
generator_modules = LoadGenerators(args.generators_string)
fileutil.EnsureDirectoryExists(args.output_dir)
processor = MojomProcessor(lambda filename: filename in args.filename)
processor.LoadTypemaps(set(args.typemaps))
if args.filelist:
with open(args.filelist) as f:
args.filename.extend(f.read().split())
for filename in args.filename:
processor._GenerateModule(args, remaining_args, generator_modules,
RelativePath(filename, args.depth), [])
return 0
def DoGenerateFiles(self):
fileutil.EnsureDirectoryExists(self.output_dir)
# Keep this above the others as .GetStructs() changes the state of the
# module, annotating structs with required information.
for struct in self.GetStructs():
self.Write(self.GenerateStructSource(struct),
'%s.java' % GetNameForElement(struct))
for union in self.module.unions:
self.Write(self.GenerateUnionSource(union),
'%s.java' % GetNameForElement(union))
for enum in self.module.enums:
self.Write(self.GenerateEnumSource(enum),
'%s.java' % GetNameForElement(enum))
for interface in self.GetInterfaces():
self.Write(self.GenerateInterfaceSource(interface),
'%s.java' % GetNameForElement(interface))
self.Write(self.GenerateInterfaceInternalSource(interface),
'%s_Internal.java' % GetNameForElement(interface))
if self.module.constants:
self.Write(self.GenerateConstantsSource(self.module),
'%s.java' % GetConstantsMainEntityName(self.module))
def GenerateFiles(self, args):
elements = self.module.namespace.split('.')
elements.append("%s.dart" % self.module.name)
package_name = GetPackage(self.module)
lib_module = self.GenerateLibModule(args)
pkg_path = os.path.join("dart-pkg", package_name, "lib", *elements)
self.Write(lib_module, pkg_path)
gen_path = os.path.join("dart-gen", package_name, "lib", *elements)
full_gen_path = os.path.join(self.output_dir, gen_path)
self.Write(lib_module, gen_path)
link = self.MatchMojomFilePath("%s.dart" % self.module.name)
full_link_path = os.path.join(self.output_dir, link)
if os.path.exists(full_link_path):
os.unlink(full_link_path)
fileutil.EnsureDirectoryExists(os.path.dirname(full_link_path))
try:
if sys.platform == "win32":
shutil.copy(full_gen_path, full_link_path)
else:
os.symlink(full_gen_path, full_link_path)
except OSError as e:
# Errno 17 is file already exists. If the link fails because file already
# exists assume another instance of this script tried to create the same
# file and continue on.
if e.errno != 17:
raise e
def GenerateFiles(self, unparsed_args):
parser = argparse.ArgumentParser()
parser.add_argument('--libcamera_generate_core_header', action='store_true')
parser.add_argument('--libcamera_generate_core_serializer', action='store_true')
parser.add_argument('--libcamera_generate_header', action='store_true')
parser.add_argument('--libcamera_generate_serializer', action='store_true')
parser.add_argument('--libcamera_generate_proxy_cpp', action='store_true')
parser.add_argument('--libcamera_generate_proxy_h', action='store_true')
parser.add_argument('--libcamera_generate_proxy_worker', action='store_true')
parser.add_argument('--libcamera_output_path')
args = parser.parse_args(unparsed_args)
if not args.libcamera_generate_core_header and \
not args.libcamera_generate_core_serializer:
ValidateNamespace(self.module.mojom_namespace)
ValidateInterfaces(self.module.interfaces)
self.module_name = ModuleClassName(self.module)
fileutil.EnsureDirectoryExists(os.path.dirname(args.libcamera_output_path))
gen_funcs = [
[args.libcamera_generate_core_header, self._GenerateCoreHeader],
[args.libcamera_generate_core_serializer, self._GenerateCoreSerializer],
[args.libcamera_generate_header, self._GenerateDataHeader],
[args.libcamera_generate_serializer, self._GenerateSerializer],
[args.libcamera_generate_proxy_cpp, self._GenerateProxyCpp],
[args.libcamera_generate_proxy_h, self._GenerateProxyHeader],
[args.libcamera_generate_proxy_worker, self._GenerateProxyWorker],
]
for pair in gen_funcs:
if pair[0]:
self.Write(pair[1](), args.libcamera_output_path)
def ZipContentInto(root, zip_filename):
fileutil.EnsureDirectoryExists(os.path.dirname(zip_filename))
with zipfile.ZipFile(zip_filename, 'w') as zip_file:
for dirname, _, files in os.walk(root):
for filename in files:
path = os.path.join(dirname, filename)
path_in_archive = os.path.relpath(path, root)
zip_file.write(path, path_in_archive)
def WriteFile(contents, full_path):
# Make sure the containing directory exists.
full_dir = os.path.dirname(full_path)
fileutil.EnsureDirectoryExists(full_dir)
# Dump the data to disk.
with open(full_path, "w+") as f:
f.write(contents)
def _PickleAST(ast, output_file):
full_dir = os.path.dirname(output_file)
fileutil.EnsureDirectoryExists(full_dir)
try:
WriteFile(cPickle.dumps(ast), output_file)
except (IOError, cPickle.PicklingError) as e:
print "%s: Error: %s" % (output_file, str(e))
sys.exit(1)
def _Parse(args, _):
fileutil.EnsureDirectoryExists(args.output_dir)
if args.filelist:
with open(args.filelist) as f:
args.filename.extend(f.read().split())
for filename in args.filename:
_ParseFile(args, RelativePath(filename, args.depth))
return 0
def _Generate(args, remaining_args):
if args.variant == "none":
args.variant = None
generator_modules = LoadGenerators(args.generators_string)
fileutil.EnsureDirectoryExists(args.output_dir)
processor = MojomProcessor(lambda filename: filename in args.filename)
processor.LoadTypemaps(set(args.typemaps))
for filename in args.filename:
processor.ProcessFile(args, remaining_args, generator_modules, filename)
return 0
def WriteFile(contents, full_path):
# If |contents| is same with the file content, we skip updating.
if os.path.isfile(full_path):
with open(full_path, 'rb') as destination_file:
if destination_file.read() == contents:
return
# Make sure the containing directory exists.
full_dir = os.path.dirname(full_path)
fileutil.EnsureDirectoryExists(full_dir)
# Dump the data to disk.
with open(full_path, "wb") as f:
f.write(contents)
def main():
args = parse_args()
mojom_module = args.mojom_module[0]
output_dir = args.output_dir[0]
excluded = args.exclude[0] if args.exclude else ""
generator_module = importlib.import_module('mojom_objc_generator')
bytecode_path = os.path.join(output_dir, "objc_templates_bytecode")
fileutil.EnsureDirectoryExists(bytecode_path)
template_expander.PrecompileTemplates({"objc": generator_module}, bytecode_path)
generator = generator_module.Generator(None)
generator.bytecode_path = bytecode_path
generator.excludedTypes = excluded.split(',')
with open(mojom_module, 'rb') as f:
generator.module = Module.Load(f)
generator.GenerateFiles(output_dir)
def main():
parser = argparse.ArgumentParser(
description="Generate bindings from mojom files.")
parser.add_argument("filename", nargs="+", help="mojom input file")
parser.add_argument("-d",
"--depth",
dest="depth",
default=".",
help="depth from source root")
parser.add_argument("-o",
"--output_dir",
dest="output_dir",
default=".",
help="output directory for generated files")
parser.add_argument("-g",
"--generators",
dest="generators_string",
metavar="GENERATORS",
default="c++,javascript,java",
help="comma-separated list of generators")
parser.add_argument("--debug_print_intermediate",
action="store_true",
help="print the intermediate representation")
parser.add_argument("-I",
dest="import_directories",
action="append",
metavar="directory",
default=[],
help="add a directory to be searched for import files")
parser.add_argument("--use_bundled_pylibs",
action="store_true",
help="use Python modules bundled in the SDK")
(args, remaining_args) = parser.parse_known_args()
generator_modules = LoadGenerators(args.generators_string)
fileutil.EnsureDirectoryExists(args.output_dir)
processor = MojomProcessor(lambda filename: filename in args.filename)
for filename in args.filename:
processor.ProcessFile(args, remaining_args, generator_modules,
filename)
return 0
def WriteFile(contents, full_path):
# If |contents| is same with the file content, we skip updating.
if not isinstance(contents, bytes):
data = contents.encode('utf8')
else:
data = contents
if os.path.isfile(full_path):
with open(full_path, 'rb') as destination_file:
if destination_file.read() == data:
return
# Make sure the containing directory exists.
full_dir = os.path.dirname(full_path)
fileutil.EnsureDirectoryExists(full_dir)
# Dump the data to disk.
with open(full_path, 'wb') as f:
f.write(data)
def GenerateFiles(self, args):
elements = self.module.namespace.split('.')
elements.append("%s.dart" % self.module.name)
lib_module = self.GenerateLibModule(args)
# List of packages with checked in bindings.
# TODO(johnmccutchan): Stop generating bindings as part of build system
# and then remove this.
packages_with_checked_in_bindings = [
'_mojo_for_test_only',
'mojo',
'mojo_apptest',
'mojo_services',
'mojo_sdk',
'mojom',
]
package_name = GetPackage(self.module)
if not (package_name in packages_with_checked_in_bindings):
pkg_path = os.path.join("dart-pkg", package_name, "lib", *elements)
self.Write(lib_module, pkg_path)
gen_path = os.path.join("dart-gen", package_name, "lib", *elements)
full_gen_path = os.path.join(self.output_dir, gen_path)
self.Write(lib_module, gen_path)
link = self.MatchMojomFilePath("%s.dart" % self.module.name)
full_link_path = os.path.join(self.output_dir, link)
if os.path.exists(full_link_path):
os.unlink(full_link_path)
fileutil.EnsureDirectoryExists(os.path.dirname(full_link_path))
try:
if sys.platform == "win32":
shutil.copy(full_gen_path, full_link_path)
else:
os.symlink(full_gen_path, full_link_path)
except OSError as e:
# Errno 17 is file already exists. If the link fails because file already
# exists assume another instance of this script tried to create the same
# file and continue on.
if e.errno != 17:
raise e
def main():
global ast_root_dir
args = parse_args()
mojom_module = args.mojom_module[0]
module_include_path = args.module_include_path[0]
output_dir = args.output_dir[0]
ast_root_dir = os.path.dirname(mojom_module)
generator_module = importlib.import_module('mojom_objc_generator')
bytecode_path = os.path.join(output_dir, "objc_templates_bytecode")
fileutil.EnsureDirectoryExists(bytecode_path)
template_expander.PrecompileTemplates({"objc": generator_module},
bytecode_path)
generator = generator_module.Generator(None)
generator.bytecode_path = bytecode_path
generator.module_include_path = module_include_path
with open(mojom_module, 'rb') as f:
generator.module = Module.Load(f)
generator.GenerateFiles(output_dir)
def _VerifyImportDeps(args, __):
fileutil.EnsureDirectoryExists(args.gen_dir)
if args.filelist:
with open(args.filelist) as f:
args.filename.extend(f.read().split())
for filename in args.filename:
rel_path = RelativePath(filename, args.depth)
tree = _UnpickleAST(_GetPicklePath(rel_path, args.gen_dir))
mojom_imports = set(parsed_imp.import_filename
for parsed_imp in tree.import_list)
sources = set()
target_prefix = args.deps_file.split(".deps_sources_list")[0]
sources = GetSourcesList(target_prefix, sources, args.gen_dir)
if (not sources.issuperset(mojom_imports)):
target_name = target_prefix.rsplit("/", 1)[1]
target_prefix_without_gen_dir = target_prefix.split(
args.gen_dir + "/", 1)[1]
full_target_name = "//" + target_prefix_without_gen_dir.rsplit(
"/", 1)[0] + ":" + target_name
print(">>> File \"%s\"" % filename)
print(">>> from target \"%s\"" % full_target_name)
print(
">>> is missing dependencies for the following imports:\n%s" %
list(mojom_imports.difference(sources)))
sys.exit(1)
source_filename, _ = os.path.splitext(rel_path.relative_path())
output_file = source_filename + '.v'
output_file_path = os.path.join(args.gen_dir, output_file)
WriteFile(b"", output_file_path)
return 0
def main():
global ast_root_dir
args = parse_args()
pickled_ast = args.pickled_ast[0]
module_include_path = args.module_include_path[0]
mojom_file = args.mojom_file[0]
output_dir = args.output_dir[0]
ast_root_dir = os.path.dirname(pickled_ast)
tree = _UnpickleAST(pickled_ast)
generator_module = importlib.import_module('mojom_objc_generator')
bytecode_path = os.path.join(output_dir, "objc_templates_bytecode")
fileutil.EnsureDirectoryExists(bytecode_path)
template_expander.PrecompileTemplates({"objc": generator_module},
bytecode_path)
generator = generator_module.Generator(None)
generator.bytecode_path = bytecode_path
generator.module_include_path = module_include_path
generator.module = _GenerateModule(tree, mojom_file)
generator.GenerateFiles(output_dir)
class Generator(generator.Generator):
dart_filters = {
'array_expected_length': GetArrayExpectedLength,
'array': GetArrayKind,
'decode_method': DecodeMethod,
'default_value': DartDefaultValue,
'encode_method': EncodeMethod,
'is_imported_kind': IsImportedKind,
'is_array_kind': mojom.IsArrayKind,
'is_map_kind': mojom.IsMapKind,
'is_numerical_kind': mojom.IsNumericalKind,
'is_any_handle_kind': mojom.IsAnyHandleKind,
'is_string_kind': mojom.IsStringKind,
'is_nullable_kind': mojom.IsNullableKind,
'is_pointer_array_kind': IsPointerArrayKind,
'is_enum_array_kind': IsEnumArrayKind,
'is_struct_kind': mojom.IsStructKind,
'is_union_kind': mojom.IsUnionKind,
'is_enum_kind': mojom.IsEnumKind,
'is_interface_kind': mojom.IsInterfaceKind,
'is_interface_request_kind': mojom.IsInterfaceRequestKind,
'dart_true_false': GetDartTrueFalse,
'dart_type': DartDeclType,
'name': GetNameForElement,
'interface_response_name': GetInterfaceResponseName,
'dot_to_underscore': DotToUnderscore,
'is_cloneable_kind': mojom.IsCloneableKind,
'upper_camel': UpperCamelCase,
'lower_camel': CamelCase,
'raise': RaiseHelper,
}
# If set to True, then mojom type information will be generated.
should_gen_mojom_types = False
def GetParameters(self, args):
package = self.module.name.split('.')[0]
# True if handles are used anywhere in the mojom.
has_handles = any(
not mojom.IsCloneableKind(kind)
for kind in (self.GetStructs() + self.GetStructsFromMethods() +
self.GetUnions()))
parameters = {
"namespace": self.module.namespace,
"imports": self.GetImports(args),
"kinds": self.module.kinds,
"enums": self.module.enums,
"module": resolver.ResolveConstants(self.module, ExpressionToText),
"structs": self.GetStructs() + self.GetStructsFromMethods(),
"unions": self.GetUnions(),
"interfaces": self.GetInterfaces(),
"imported_interfaces": self.GetImportedInterfaces(),
"imported_from": self.ImportedFrom(),
"typepkg": '%s.' % _mojom_types_pkg_short,
"descpkg": '%s.' % _service_describer_pkg_short,
"mojom_types_import": 'import \'%s\' as %s;' % \
(_mojom_types_pkg, _mojom_types_pkg_short),
"service_describer_import": 'import \'%s\' as %s;' % \
(_service_describer_pkg, _service_describer_pkg_short),
"has_handles": has_handles,
}
# If this is the mojom types package, clear the import-related params.
if package == _mojom_types_pkg_short:
parameters["typepkg"] = ""
parameters["mojom_types_import"] = ""
# If this is the service describer package, clear the import-related params.
if package == _service_describer_pkg_short:
parameters["descpkg"] = ""
parameters["service_describer_import"] = ""
# If no interfaces were defined, the service describer import isn't needed.
if len(self.module.interfaces) == 0:
parameters["service_describer_import"] = ""
return parameters
def GetGlobals(self):
return {
'should_gen_mojom_types': self.should_gen_mojom_types,
}
@UseJinja("dart_templates/module.lib.tmpl", filters=dart_filters)
def GenerateLibModule(self, args):
return self.GetParameters(args)
def GenerateFiles(self, args):
self.should_gen_mojom_types = "--generate_type_info" in args
elements = self.module.namespace.split('.')
elements.append("%s.dart" % self.module.name)
lib_module = self.GenerateLibModule(args)
# List of packages with checked in bindings.
# TODO(johnmccutchan): Stop generating bindings as part of build system
# and then remove this.
packages_with_checked_in_bindings = [
'_mojo_for_test_only',
'mojo',
'mojo_apptest',
'mojo_services',
'mojo_sdk',
'mojom',
]
package_name = GetPackage(self.module)
if not (package_name in packages_with_checked_in_bindings):
pkg_path = os.path.join("dart-pkg", package_name, "lib", *elements)
self.Write(lib_module, pkg_path)
gen_path = os.path.join("dart-gen", package_name, "lib", *elements)
full_gen_path = os.path.join(self.output_dir, gen_path)
self.Write(lib_module, gen_path)
link = self.MatchMojomFilePath("%s.dart" % self.module.name)
full_link_path = os.path.join(self.output_dir, link)
try:
os.unlink(full_link_path)
except OSError, exc:
# If the file does not exist, ignore the error.
if errno.ENOENT == exc.errno:
pass
else:
raise
fileutil.EnsureDirectoryExists(os.path.dirname(full_link_path))
try:
if sys.platform == "win32":
shutil.copy(full_gen_path, full_link_path)
else:
os.symlink(full_gen_path, full_link_path)
except OSError as e:
# Errno 17 is file already exists. If the link fails because file already
# exists assume another instance of this script tried to create the same
# file and continue on.
if e.errno != 17:
raise e
def _Parse(args, _):
fileutil.EnsureDirectoryExists(args.output_dir)
for filename in args.filename:
_ParseFile(args, RelativePath(filename, args.depth))
return 0
class Generator(generator.Generator):
dart_filters = {
'array_expected_length': GetArrayExpectedLength,
'array': GetArrayKind,
'decode_method': DecodeMethod,
'default_value': DartDefaultValue,
'encode_method': EncodeMethod,
'is_map_kind': mojom.IsMapKind,
'is_nullable_kind': mojom.IsNullableKind,
'is_pointer_array_kind': IsPointerArrayKind,
'is_enum_array_kind': IsEnumArrayKind,
'is_struct_kind': mojom.IsStructKind,
'is_union_kind': mojom.IsUnionKind,
'is_enum_kind': mojom.IsEnumKind,
'dart_true_false': GetDartTrueFalse,
'dart_type': DartDeclType,
'name': GetNameForElement,
'interface_response_name': GetInterfaceResponseName,
'dot_to_underscore': DotToUnderscore,
'is_cloneable_kind': mojom.IsCloneableKind,
}
def GetParameters(self, args):
return {
"namespace": self.module.namespace,
"imports": self.GetImports(args),
"kinds": self.module.kinds,
"enums": self.module.enums,
"module": resolver.ResolveConstants(self.module, ExpressionToText),
"structs": self.GetStructs() + self.GetStructsFromMethods(),
"unions": self.GetUnions(),
"interfaces": self.GetInterfaces(),
"imported_interfaces": self.GetImportedInterfaces(),
"imported_from": self.ImportedFrom(),
}
@UseJinja("dart_templates/module.lib.tmpl", filters=dart_filters)
def GenerateLibModule(self, args):
return self.GetParameters(args)
def GenerateFiles(self, args):
elements = self.module.namespace.split('.')
elements.append("%s.dart" % self.module.name)
lib_module = self.GenerateLibModule(args)
# List of packages with checked in bindings.
# TODO(johnmccutchan): Stop generating bindings as part of build system
# and then remove this.
packages_with_checked_in_bindings = [
'_mojo_for_test_only',
'mojo',
'mojo_apptest',
'mojo_services',
'mojo_sdk',
'mojom',
]
package_name = GetPackage(self.module)
if not (package_name in packages_with_checked_in_bindings):
pkg_path = os.path.join("dart-pkg", package_name, "lib", *elements)
self.Write(lib_module, pkg_path)
gen_path = os.path.join("dart-gen", package_name, "lib", *elements)
full_gen_path = os.path.join(self.output_dir, gen_path)
self.Write(lib_module, gen_path)
link = self.MatchMojomFilePath("%s.dart" % self.module.name)
full_link_path = os.path.join(self.output_dir, link)
try:
os.unlink(full_link_path)
except OSError, exc:
# If the file does not exist, ignore the error.
if errno.ENOENT == exc.errno:
pass
else:
raise
fileutil.EnsureDirectoryExists(os.path.dirname(full_link_path))
try:
if sys.platform == "win32":
shutil.copy(full_gen_path, full_link_path)
else:
os.symlink(full_gen_path, full_link_path)
except OSError as e:
# Errno 17 is file already exists. If the link fails because file already
# exists assume another instance of this script tried to create the same
# file and continue on.
if e.errno != 17:
raise e