Self-help for a Makefile in a python project

help.py

# this will provide help for a makefile

import sys
import re

if len(sys.argv) < 2:
  print("Usage: help.py Makefile")
  exit(1)

print("Type make followed by one of these commands to run a task:")

for makefile in sys.argv[1:]:
  s = open(makefile.strip(), 'r').read()
  matches = re.finditer(r"^(.+):.+##\W?(.+)", s, re.MULTILINE)
  for m, match in enumerate(matches, start=1):
    print(f"  \033[36m{match[1]:<20}\033[0m{match[2]}")

Makefile

.PHONY: help clean

help:	## Show this help
	@python tools/help.py "$(MAKEFILE_LIST)"

clean: ## Remove all built files
	@rm -f FILES