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57"""
Reverse the ordering of versions in a changelog file, i.e., when archiving a changelog.
"""
import re
import sys
def parse_changelog(content):
"""Parse the changelog content into individual version blocks."""
# Use regex to split the content by version headers
version_pattern = r"(?=## \d+\.\d+\.\d+)"
version_blocks = re.split(version_pattern, content)
# First item in the list is the header, which we want to preserve
header = version_blocks[0]
version_blocks = version_blocks[1:]
return header, version_blocks
def reverse_changelog(content):
"""Reverse the order of version blocks in the changelog."""
header, version_blocks = parse_changelog(content)
# Reverse the version blocks
reversed_blocks = version_blocks[::-1]
# Combine the header and reversed blocks
reversed_content = header + "".join(reversed_blocks)
return reversed_content
def main():
if len(sys.argv) < 2:
print("Usage: reverse-changelog.py <changelog-file>")
sys.exit(1)
# Read the input file
name = sys.argv[1]
with open(name, "r") as file:
content = file.read()
# Reverse the changelog
reversed_content = reverse_changelog(content)
# Write the output to a new file
with open(name, "w") as file:
file.write(reversed_content)
print(f"Updated {name}")
if __name__ == "__main__":
main()