ladybird/Meta/check-newlines-at-eof.py

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#!/usr/bin/env python3
import os
import re
import subprocess
import sys
RE_RELEVANT_FILE_EXTENSION = re.compile('\\.(cpp|h|gml|html|js|css|sh|py|json|txt)$')
def should_check_file(filename):
if not RE_RELEVANT_FILE_EXTENSION.search(filename):
return False
if filename.startswith('Tests/LibWeb/Layout/'):
return False
if filename.endswith('.txt'):
return 'CMake' in filename
return True
def find_files_here_or_argv():
if len(sys.argv) > 1:
raw_list = sys.argv[1:]
else:
process = subprocess.run(["git", "ls-files"], check=True, capture_output=True)
raw_list = process.stdout.decode().strip('\n').split('\n')
return filter(should_check_file, raw_list)
def run():
"""Check files checked in to git for trailing newlines at end of file."""
no_newline_at_eof_errors = []
blank_lines_at_eof_errors = []
did_fail = False
for filename in find_files_here_or_argv():
with open(filename, "r") as f:
f.seek(0, os.SEEK_END)
f.seek(f.tell() - 1, os.SEEK_SET)
if f.read(1) != '\n':
did_fail = True
no_newline_at_eof_errors.append(filename)
continue
while True:
f.seek(f.tell() - 2, os.SEEK_SET)
char = f.read(1)
if not char.isspace():
break
if char == '\n':
did_fail = True
blank_lines_at_eof_errors.append(filename)
break
if no_newline_at_eof_errors:
print("Files with no newline at the end:", " ".join(no_newline_at_eof_errors))
if blank_lines_at_eof_errors:
print("Files that have blank lines at the end:", " ".join(blank_lines_at_eof_errors))
if did_fail:
sys.exit(1)
if __name__ == '__main__':
os.chdir(os.path.dirname(__file__) + "/..")
run()