#!/bin/sh

die () {
	echo "$*" >&2
	exit 1
}

WORDPAD="$(ls {"$PROGRAMFILES/Windows NT","$SYSTEMROOT"}/*/wordpad.exe 2>&- | head -1)"

test $# = 1 ||
die "Usage: $0 <file>"

case "$1" in
\\*|/*|?:*) ;; # do nothing
*) set "$(pwd -W)/$1";;
esac

case "$1" in
*/.git/*) ;; # needs LF line endings
*) exec "$WORDPAD" "$1" || die "Could not launch $WORDPAD";;
esac

"$WORDPAD" "$1" &&
dos2unix.exe "$1" &&
case "$1" in
*/COMMIT_EDITMSG|*\\COMMIT_EDITMSG)
	! columns="$(git config format.commitmessagecolumns)" || {
		msg="$(fmt.exe -s -w "$columns" "$1" -p '#' | \
			fmt.exe -s -w "$columns" -)" &&
		printf "%s" "$msg" >"$1"
	}
	;;
esac