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#!/usr/bin/python
#
# Protocol Buffers - Google's data interchange format
# Copyright 2023 Google LLC. All rights reserved.
# https://developers.google.com/protocol-buffers/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google LLC nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""A tool to convert MODULE.bazel -> CMakeLists.txt.
This tool is very protobuf-specific at the moment, and should not be seen as a
generic Bazel -> CMake converter.
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import os
import sys
import textwrap
class ExtensionFunctions(object):
"""A fake extension that we can use to get the functions we need."""
def toolchain(self, *args, **kwargs):
pass
def parse(self, *args, **kwargs):
pass
def spec(self, *args, **kwargs):
pass
def from_specs(self, *args, **kwargs):
pass
def install(self, *args, **kwargs):
pass
def bundle_fetch(self, *args, **kwargs):
pass
class ModuleFileFunctions(object):
"""A fake MODULE file that we can exec() to get the functions we need."""
def __init__(self, converter):
self.converter = converter
def module(self, *args, **kwargs):
pass
def bazel_dep(self, name, version, **kwargs):
self.converter.toplevel += textwrap.dedent(
"""\
set(%(name)s-version "%(version)s")
"""
% {
"name": name,
"version": version,
}
)
def register_toolchains(self, *args, **kwargs):
pass
def use_repo(self, *args, **kwargs):
pass
def single_version_override(self, *args, **kwargs):
pass
def use_extension(self, *args, **kwargs):
return ExtensionFunctions()
def local_path_override(self, *args, **kwargs):
pass
def git_override(self, *args, **kwargs):
pass
def archive_override(self, *args, **kwargs):
pass
class Converter(object):
def __init__(self):
self.toplevel = ""
self.if_lua = ""
def convert(self):
return self.template % {
"toplevel": converter.toplevel,
}
template = textwrap.dedent("""\
# Auto-generated by @//cmake:make_dependencies
#
# This file contains lists of external dependencies based on our Bazel
# config. It should be included from a hand-written CMake file that uses
# them.
#
# Changes to this file will be overwritten based on Bazel definitions.
if(${CMAKE_VERSION} VERSION_GREATER 3.16 OR ${CMAKE_VERSION} VERSION_EQUAL 3.16)
include_guard()
endif()
%(toplevel)s
""")
data = {}
converter = Converter()
def GetDict(obj):
ret = {}
for k in dir(obj):
if not k.startswith("_"):
ret[k] = getattr(obj, k)
return ret
# We take the MODULE path as a command-line argument to ensure that we can find
# it regardless of how exactly Bazel was invoked.
exec(open(sys.argv[1]).read(), GetDict(ModuleFileFunctions(converter)))
with open(sys.argv[2], "w") as f:
f.write(converter.convert())
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