~ chicken-core (chicken-5) /scripts/update-copyright-year

 1#!/bin/sh
 2#
 3# Usage: update-copyright-year [YEAR]
 4#
 5
 6YEAR=${1:-$(date +%Y)}
 7PREV=$((YEAR - 1))
 8
 9git grep -Il '(c) [0-9-]*, The CHICKEN Team' | while read i
10do
11  sed -r "s/\\(c\\) (([0-9]+)-|($PREV))($PREV)?,/(c) \\2\\3-$YEAR,/" "$i" > tmp
12  mv tmp "$i"
13done