circuitpython/tools/codeformat.py

240 lines
7.7 KiB
Python

#!/usr/bin/env python3
#
# This file is part of the MicroPython project, http://micropython.org/
#
# The MIT License (MIT)
#
# Copyright (c) 2020 Damien P. George
# Copyright (c) 2020 Jim Mussared
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import argparse
import glob
import fnmatch
import itertools
import os
import pathlib
import re
import sys
import subprocess
# Relative to top-level repo dir.
PATHS = [
# C
"devices/**/*.[ch]",
"drivers/bus/*.[ch]",
"extmod/*.[ch]",
"lib/netutils/*.[ch]",
"lib/timeutils/*.[ch]",
"lib/utils/*.[ch]",
"mpy-cross/**/*.[ch]",
"ports/**/*.[ch]",
"py/**/*.[ch]",
"shared-bindings/**/*.[ch]",
"shared-module/**/*.[ch]",
"supervisor/**/*.[ch]",
# Python
"extmod/*.py",
"ports/**/*.py",
"py/**/*.py",
"tools/**/*.py",
"tests/**/*.py",
]
EXCLUSIONS = [
# STM32 build includes generated Python code.
"ports/*/build*",
# gitignore in ports/unix ignores *.py, so also do it here.
"ports/unix/*.py",
# not real python files
"tests/**/repl_*.py",
# needs careful attention before applying automatic formatting
"tests/basics/*.py",
]
# None of the standard Python path matching routines implement the matching
# we want, which is most like git's "pathspec" version of globs.
# In particular, we want "**/" to match all directories.
# This routine is sufficient to work with the patterns we have, but
# subtle cases like character classes that contain meta-characters
# are not covered
def git_glob_to_regex(pat):
def transform(m):
m = m.group(0)
if m == "*":
return "[^/]*"
if m == "**/":
return "(.*/)?"
if m == "?":
return "[^/]"
if m == ".":
return r"\."
return m
result = [transform(part) for part in re.finditer(r"(\*\*/|[*?.]|[^*?.]+)", pat)]
return "(^" + "".join(result) + "$)"
# Create a single, complicated regular expression that matches exactly the
# files we want, accounting for the PATHS as well as the EXCLUSIONS.
path_re = (
""
# First a negative lookahead assertion that it doesn't match
# any of the EXCLUSIONS
+ "(?!"
+ "|".join(git_glob_to_regex(pat) for pat in EXCLUSIONS)
+ ")"
# Then a positive match for any of the PATHS
+ "(?:"
+ "|".join(git_glob_to_regex(pat) for pat in PATHS)
+ ")"
)
path_rx = re.compile(path_re)
# Path to repo top-level dir.
TOP = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
UNCRUSTIFY_CFG = os.path.join(TOP, "tools/uncrustify.cfg")
C_EXTS = (
".c",
".h",
)
PY_EXTS = (".py",)
# Transform a filename argument relative to the current directory into one
# relative to the TOP directory, which is what we need when checking against
# path_rx.
def relative_filename(arg):
return str(pathlib.Path(arg).resolve().relative_to(TOP))
def list_files(args):
return sorted(arg for arg in args if path_rx.match(relative_filename(arg)))
def fixup_c(filename):
# Read file.
with open(filename) as f:
lines = f.readlines()
# Write out file with fixups.
with open(filename, "w", newline="") as f:
dedent_stack = []
i = 0
while lines:
# Get next line.
i += 1
l = lines.pop(0)
# Revert "// |" back to "//| "
if l.startswith("// |"):
l = "//|" + l[4:]
# Dedent #'s to match indent of following line (not previous line).
m = re.match(r"( +)#(if |ifdef |ifndef |elif |else|endif)", l)
if m:
indent = len(m.group(1))
directive = m.group(2)
if directive in ("if ", "ifdef ", "ifndef "):
l_next = lines[0]
indent_next = len(re.match(r"( *)", l_next).group(1))
if indent - 4 == indent_next and re.match(r" +(} else |case )", l_next):
# This #-line (and all associated ones) needs dedenting by 4 spaces.
l = l[4:]
dedent_stack.append(indent - 4)
else:
# This #-line does not need dedenting.
dedent_stack.append(-1)
elif dedent_stack:
if dedent_stack[-1] >= 0:
# This associated #-line needs dedenting to match the #if.
indent_diff = indent - dedent_stack[-1]
assert indent_diff >= 0
l = l[indent_diff:]
if directive == "endif":
dedent_stack.pop()
# Write out line.
f.write(l)
assert not dedent_stack, filename
def main():
cmd_parser = argparse.ArgumentParser(
description="Auto-format C and Python files -- to be used via pre-commit only."
)
cmd_parser.add_argument("-c", action="store_true", help="Format C code only")
cmd_parser.add_argument("-p", action="store_true", help="Format Python code only")
cmd_parser.add_argument("-v", action="store_true", help="Enable verbose output")
cmd_parser.add_argument("--dry-run", action="store_true", help="Print, don't act")
cmd_parser.add_argument("files", nargs="+", help="Run on specific globs")
args = cmd_parser.parse_args()
if args.dry_run:
print(" ".join(sys.argv))
# Setting only one of -c or -p disables the other. If both or neither are set, then do both.
format_c = args.c or not args.p
format_py = args.p or not args.c
# Expand the arguments passed on the command line, subject to the PATHS and EXCLUSIONS
files = list_files(args.files)
# Extract files matching a specific language.
def lang_files(exts):
for file in files:
if os.path.splitext(file)[1].lower() in exts:
yield file
# Run tool on N files at a time (to avoid making the command line too long).
def batch(cmd, files, N=200):
while True:
file_args = list(itertools.islice(files, N))
if not file_args:
break
if args.dry_run:
print(" ".join(cmd + file_args))
else:
subprocess.call(cmd + file_args)
# Format C files with uncrustify.
if format_c:
command = ["uncrustify", "-c", UNCRUSTIFY_CFG, "-lC", "--no-backup"]
if not args.v:
command.append("-q")
batch(command, lang_files(C_EXTS))
for file in lang_files(C_EXTS):
fixup_c(file)
# Format Python files with black.
if format_py:
command = ["black", "--fast", "--line-length=99"]
if args.v:
command.append("-v")
else:
command.append("-q")
batch(command, lang_files(PY_EXTS))
if __name__ == "__main__":
main()