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