mirror of
https://github.com/harvard-edge/cs249r_book.git
synced 2026-05-10 15:49:25 -05:00
2a6d83107b
Refactors the blank line collapsing logic from a bash command to a dedicated python script. This change improves cross-platform compatibility, particularly addressing issues with sed implementations on different operating systems. It also enhances code readability and maintainability by using a python script.
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
#!/usr/bin/env python3
|
|
"""
|
|
Script to collapse multiple consecutive blank lines into single blank lines.
|
|
This is a cross-platform solution that works on both macOS and Linux.
|
|
"""
|
|
|
|
import sys
|
|
import re
|
|
|
|
|
|
def collapse_blank_lines(content):
|
|
"""Replace multiple consecutive blank lines with a single blank line."""
|
|
# Replace 3 or more consecutive blank lines with 2 blank lines
|
|
return re.sub(r'\n\s*\n\s*\n+', '\n\n', content)
|
|
|
|
|
|
def main():
|
|
"""Process files and collapse extra blank lines."""
|
|
if len(sys.argv) < 2:
|
|
print("Usage: python collapse_blank_lines.py <file1> [file2] ...")
|
|
sys.exit(1)
|
|
|
|
modified_files = []
|
|
|
|
for filename in sys.argv[1:]:
|
|
try:
|
|
# Read the file
|
|
with open(filename, 'r', encoding='utf-8') as f:
|
|
content = f.read()
|
|
|
|
# Process the content
|
|
new_content = collapse_blank_lines(content)
|
|
|
|
# Write back if modified
|
|
if new_content != content:
|
|
with open(filename, 'w', encoding='utf-8') as f:
|
|
f.write(new_content)
|
|
modified_files.append(filename)
|
|
print(f"Modified: {filename}")
|
|
|
|
except Exception as e:
|
|
print(f"Error processing {filename}: {e}", file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
# Exit with code 1 if files were modified (pre-commit convention)
|
|
if modified_files:
|
|
sys.exit(1)
|
|
else:
|
|
sys.exit(0)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|