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#!/usr/bin/env python3

import argparse

import re

import subprocess

import sys

from pathlib import Path

from typing import List

class UsageError(Exception):

pass

def parse_version():

with Path("setup.py").open() as infile:

for line in infile:

if m := re.match(r"VERSION\s*=\s*\"(.*)\"$", line):

return m.groups()[0]

def bump_version(path: Path, prefixes: List[str], current_version: str, new_version: str):

prefixes = tuple(prefixes)

lines = []

for line in path.open():

if line.startswith(prefixes):

line = line.replace(current_version, new_version)

lines.append(line)

path.write_text("".join(lines))

def git(*args):

return subprocess.check_call(["git"] + list(args))

def make(*args):

return subprocess.check_call(["make"] + list(args))

def check_changelog():

old_changelog = Path("CHANGES.rst").read_text()

make("changes")

new_changelog = Path("CHANGES.rst").read_text()

if old_changelog == new_changelog:

raise UsageError("No new changelog entries")

def main():

parser = argparse.ArgumentParser()

parser.add_argument("new_version", help="Version to release")

args = parser.parse_args()

new_version: str = args.new_version

current_version = parse_version()

if current_version is None:

raise UsageError("Unable to parse version")

print(f"Current version: {current_version}")

if current_version == new_version:

raise UsageError("Current version is the same as new version")

check_changelog()

bump_version(Path("setup.py"), ["VERSION"], current_version, new_version)

bump_version(Path("doc/conf.py"), ["version"], current_version, new_version)

git("add", "setup.py", "doc/conf.py")

git("commit", "-m", "Version bump to {}".format(new_version))

git("tag", new_version)

make("changes")

git("add", "CHANGES.rst")

git("commit", "-m", "CHANGES.rst: add release notes for {}".format(new_version))

git("tag", "-f", new_version)

if __name__ == "__main__":

try:

main()

except UsageError as err:

print(f"ERROR: {err}", file=sys.stderr)

sys.exit(1)

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