crosvm/tools/fmt

#!/usr/bin/env python3
# Copyright 2022 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Run `rustfmt` on all Rust code contained in the crosvm workspace, including
# all commmon/* crates as well.
#
# Usage:
#
#    $ bin/fmt
#
# To print a diff and exit 1 if code is not formatted, but without changing any
# files, use:
#
#    $ bin/fmt --check
#

from impl.common import CROSVM_ROOT, parallel, run_main, cmd, chdir
from pathlib import Path

mdformat = cmd("mdformat")
rustfmt = cmd(cmd("rustup which rustfmt"))

# How many files to check at once in each thread.
BATCH_SIZE = 8


def find_sources(extension: str):
    for file in Path(".").glob(f"**/{extension}"):
        if file.is_relative_to("third_party"):
            continue
        if "target" in file.parts:
            continue
        yield str(file)


def main(check: bool = False):
    chdir(CROSVM_ROOT)
    check_arg = "--check" if check else None

    print(f"{'Checking' if check else 'Formatting'}: Rust, Markdown")
    parallel(
        *rustfmt(check_arg).foreach(find_sources("*.rs"), batch_size=BATCH_SIZE),
        *mdformat("--wrap 100", check_arg).foreach(find_sources("*.md"), batch_size=BATCH_SIZE),
    ).fg()


run_main(main)