app_input 0.1.2

Cross-platform mouse and keyboard input
Documentation 
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#!/usr/bin/env python3
import re
import sys
from pathlib import Path

def fix_file(path: Path, in_place: bool = True):
	# This regex matches:
	# 1) leading indentation (\s*)
	# 2) a single identifier (\w+) capturing the “v”
	# 3) literal " if "
	# 4) the same identifier again (ensured by backreference)
	# 5) " == "
	# 6) a hexadecimal literal (0x…)
	# 7) whitespace and the => arrow
	pattern = re.compile(r'^(?P<indent>\s*)(?P<var>\w+)\s+if\s+(?P=var)\s*==\s*(?P<val>0x[0-9A-Fa-f]+)(?P<after>\s*=>)', re.MULTILINE)

	text = path.read_text()

	new_text = pattern.sub(lambda m: f"{m.group('indent')}{m.group('val')}{m.group('after')}", text)

	if in_place:
		path.write_text(new_text)
		print(f"Rewrote {path}")
	else:
		print(new_text)

def main():
	import argparse
	p = argparse.ArgumentParser(
		description="Remove redundant guards of the form `v if v == 0xNN => …`"
	)
	p.add_argument('file', help="The .rs file to process", type=Path)
	p.add_argument('-n', '--no-in-place', action='store_false', dest='in_place',
				   help="Print to stdout instead of overwriting")
	args = p.parse_args()

	if not args.file.exists():
		print(f"Error: {args.file} not found", file=sys.stderr)
		sys.exit(1)

	fix_file(args.file, args.in_place)

if __name__ == '__main__':
	main()