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#!/usr/bin/env python3
"""
Extract changelog for a specified version (or __NEXT__ if no version
specified).
"""
from pathlib import Path
from sys import argv, exit, stdout, stderr
CHANGELOG = Path(__file__).parent / "../CHANGES.md"
def main(version = "__NEXT__"):
with CHANGELOG.open(encoding = "utf-8") as file:
for line in file:
# Find the heading for this version
if line.rstrip("\n") == f"## {version}" or line.startswith(f"## {version} "):
# Print subsequent lines until we reach the next version heading
for line in file:
if line.startswith("## "):
break
stdout.write(line)
return 0
print(f"No changes found for {version!r}.", file = stderr)
return 1
if __name__ == "__main__":
exit(main(*argv[1:]))
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