| #!/usr/bin/env python3 |
| |
| # Copyright 2022 The Chromium Authors |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import argparse |
| import contextlib |
| import os |
| import subprocess |
| import sys |
| |
| # Set up path to be able to import action_helpers. |
| sys.path.append( |
| os.path.join(os.path.dirname(os.path.abspath(__file__)), os.pardir, |
| os.pardir, 'build')) |
| import action_helpers |
| |
| from filter_clang_args import filter_clang_args |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser("run_bindgen.py") |
| parser.add_argument("--exe", help="Path to bindgen", required=True), |
| parser.add_argument("--header", |
| help="C header file to generate bindings for", |
| required=True) |
| parser.add_argument("--depfile", |
| help="depfile to output with header dependencies") |
| parser.add_argument("--output", help="output .rs bindings", required=True) |
| parser.add_argument( |
| "--wrap-static-fns", |
| help="output source file for `static` and `static inline` functions") |
| parser.add_argument("--ld-library-path", |
| help="LD_LIBRARY_PATH (or DYLD_LIBRARY_PATH on Mac) to " |
| "set") |
| parser.add_argument("--libclang-path", |
| help="Path to the libclang shared libray.") |
| parser.add_argument("-I", "--include", help="include path", action="append") |
| parser.add_argument("--bindgen-flags", |
| help="flags to pass to bindgen", |
| nargs="*") |
| parser.add_argument( |
| "clangargs", |
| metavar="CLANGARGS", |
| help="arguments to pass to libclang (see " |
| "https://docs.rs/bindgen/latest/bindgen/struct.Builder.html#method.clang_args)", |
| nargs="*") |
| args = parser.parse_args() |
| |
| # Abort if `TARGET` exists in the environment. Cargo sets `TARGET` when |
| # running build scripts and bindgen will try to be helpful by using that value |
| # if it's set. In practice we've seen a case where someone had the value set |
| # in their build environment with no intention of it reaching bindgen, leading |
| # to a hard-to-debug build error. |
| if 'TARGET' in os.environ: |
| sys.exit('ERROR: saw TARGET in environment, remove to avoid bindgen' |
| ' failures') |
| |
| with contextlib.ExitStack() as stack: |
| # Args passed to the actual bindgen cli |
| genargs = [] |
| genargs.append('--no-layout-tests') |
| if args.bindgen_flags is not None: |
| for flag in args.bindgen_flags: |
| genargs.append("--" + flag) |
| |
| # TODO(danakj): We need to point bindgen to |
| # //third_party/rust-toolchain/bin/rustfmt. |
| genargs.append('--no-rustfmt-bindings') |
| genargs += ['--rust-target', 'nightly'] |
| |
| if args.depfile: |
| depfile = stack.enter_context(action_helpers.atomic_output(args.depfile)) |
| genargs.append('--depfile') |
| genargs.append(depfile.name) |
| # Ideally we would use action_helpers.atomic_output for the output file, but |
| # this would put the wrong name in the depfile. |
| genargs.append('--output') |
| genargs.append(args.output) |
| |
| # The GN rules know what path to find the system headers in, and we want to |
| # use the headers we specify, instead of non-hermetic headers from elsewhere |
| # in the system. |
| genargs.append('--no-include-path-detection') |
| |
| if args.wrap_static_fns: |
| wrap_static_fns = stack.enter_context( |
| action_helpers.atomic_output(args.wrap_static_fns)) |
| genargs.append('--experimental') |
| genargs.append('--wrap-static-fns') |
| genargs.append('--wrap-static-fns-path') |
| genargs.append(wrap_static_fns.name) |
| genargs.append(args.header) |
| genargs.append('--') |
| genargs.extend(filter_clang_args(args.clangargs)) |
| env = os.environ |
| if args.ld_library_path: |
| if sys.platform == 'darwin': |
| env["DYLD_LIBRARY_PATH"] = args.ld_library_path |
| else: |
| env["LD_LIBRARY_PATH"] = args.ld_library_path |
| if args.libclang_path: |
| env["LIBCLANG_PATH"] = args.libclang_path |
| try: |
| subprocess.check_call([args.exe, *genargs], env=env) |
| except: |
| # Make sure we don't emit anything if bindgen failed. The other files use |
| # action_helpers for this. |
| try: |
| os.remove(args.output) |
| except FileNotFoundError: |
| pass |
| raise |
| |
| |
| if __name__ == '__main__': |
| main() |