139 lines
4.8 KiB
Python
139 lines
4.8 KiB
Python
"""Format C code according to QMK's style.
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"""
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from shutil import which
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from subprocess import CalledProcessError, DEVNULL, Popen, PIPE
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from argcomplete.completers import FilesCompleter
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from milc import cli
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from qmk.path import normpath
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from qmk.c_parse import c_source_files
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c_file_suffixes = ('c', 'h', 'cpp')
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core_dirs = ('drivers', 'quantum', 'tests', 'tmk_core', 'platforms')
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ignored = ('tmk_core/protocol/usb_hid', 'platforms/chibios/boards')
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def is_relative_to(file, other):
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"""Provide similar behavior to PurePath.is_relative_to in Python > 3.9
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"""
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return str(normpath(file).resolve()).startswith(str(normpath(other).resolve()))
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def find_clang_format():
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"""Returns the path to clang-format.
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"""
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for clang_version in range(20, 6, -1):
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binary = f'clang-format-{clang_version}'
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if which(binary):
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return binary
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return 'clang-format'
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def find_diffs(files):
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"""Run clang-format and diff it against a file.
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"""
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found_diffs = False
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for file in files:
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cli.log.debug('Checking for changes in %s', file)
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clang_format = Popen([find_clang_format(), file], stdout=PIPE, stderr=PIPE, universal_newlines=True)
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diff = cli.run(['diff', '-u', f'--label=a/{file}', f'--label=b/{file}', str(file), '-'], stdin=clang_format.stdout, capture_output=True)
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if diff.returncode != 0:
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print(diff.stdout)
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found_diffs = True
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return found_diffs
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def cformat_run(files):
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"""Spawn clang-format subprocess with proper arguments
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"""
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# Determine which version of clang-format to use
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clang_format = [find_clang_format(), '-i']
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try:
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cli.run([*clang_format, *map(str, files)], check=True, capture_output=False, stdin=DEVNULL)
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cli.log.info('Successfully formatted the C code.')
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return True
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except CalledProcessError as e:
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cli.log.error('Error formatting C code!')
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cli.log.debug('%s exited with returncode %s', e.cmd, e.returncode)
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cli.log.debug('STDOUT:')
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cli.log.debug(e.stdout)
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cli.log.debug('STDERR:')
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cli.log.debug(e.stderr)
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return False
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def filter_files(files, core_only=False):
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"""Yield only files to be formatted and skip the rest
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"""
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files = list(map(normpath, filter(None, files)))
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for file in files:
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if core_only:
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# The following statement checks each file to see if the file path is
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# - in the core directories
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# - not in the ignored directories
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if not any(is_relative_to(file, i) for i in core_dirs) or any(is_relative_to(file, i) for i in ignored):
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cli.log.debug("Skipping non-core file %s, as '--core-only' is used.", file)
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continue
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if file.suffix[1:] in c_file_suffixes:
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yield file
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else:
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cli.log.debug('Skipping file %s', file)
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@cli.argument('-n', '--dry-run', arg_only=True, action='store_true', help="Flag only, don't automatically format.")
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@cli.argument('-b', '--base-branch', default='origin/master', help='Branch to compare to diffs to.')
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@cli.argument('-a', '--all-files', arg_only=True, action='store_true', help='Format all core files.')
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@cli.argument('--core-only', arg_only=True, action='store_true', help='Format core files only.')
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@cli.argument('files', nargs='*', arg_only=True, type=normpath, completer=FilesCompleter('.c'), help='Filename(s) to format.')
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@cli.subcommand("Format C code according to QMK's style.", hidden=False if cli.config.user.developer else True)
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def format_c(cli):
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"""Format C code according to QMK's style.
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"""
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# Find the list of files to format
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if cli.args.files:
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files = list(filter_files(cli.args.files, cli.args.core_only))
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if not files:
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cli.log.error('No C files in filelist: %s', ', '.join(map(str, cli.args.files)))
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exit(0)
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if cli.args.all_files:
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cli.log.warning('Filenames passed with -a, only formatting: %s', ','.join(map(str, files)))
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elif cli.args.all_files:
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all_files = c_source_files(core_dirs)
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files = list(filter_files(all_files, True))
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else:
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git_diff_cmd = ['git', 'diff', '--name-only', cli.args.base_branch, *core_dirs]
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git_diff = cli.run(git_diff_cmd, stdin=DEVNULL)
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if git_diff.returncode != 0:
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cli.log.error("Error running %s", git_diff_cmd)
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print(git_diff.stderr)
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return git_diff.returncode
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changed_files = git_diff.stdout.strip().split('\n')
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files = list(filter_files(changed_files, True))
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# Sanity check
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if not files:
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cli.log.error('No changed files detected. Use "qmk format-c -a" to format all core files')
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return False
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# Run clang-format on the files we've found
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if cli.args.dry_run:
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return not find_diffs(files)
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else:
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return cformat_run(files)
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