changes

a

#!/bin/bash
# Extract changelog for a specified version (or __NEXT__ if no version
# specified).
set -euo pipefail

cd "$(dirname "$0")/.."

version="${1:-__NEXT__}"
export version

perl -ne 'print if /^# \Q$ENV{version}\E( |$)/ ... (/^# / and exit)' CHANGES.md | tail -n +2

b

#!/bin/bash
# Extract changelog for a specified version (or __NEXT__ if no version
# specified).
set -euo pipefail

cd "$(dirname "$0")/.."

main() {
    local version="${1:-__NEXT__}"

    # Open changelog on stdin
    exec < CHANGES.md

    declare line
    while read line; do
        # Find the heading for this version
        if [[ "$line" == "# $version" || "$line" == "# $version "* ]]; then

            # Print subsequent lines until we reach the next version heading
            while read line; do
                if [[ "$line" == "# "* ]]; then
                    return 0
                fi
                echo "$line"
            done
        fi
    done

    return 1
}

read() {
    # Disable word splitting (IFS) and backslash escape processing (-r)
    IFS=$'\0' builtin read -r "$@"
}

main "$@"

c

#!/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


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.startswith(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
        return 1


if __name__ == "__main__":
    exit(main(*argv[1:]))