git に export サブコマンドを追加する（tgz, tb2, zip, ディレクトリ出力も簡単）

git-export

#!/bin/bash

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

usage() {
	die "Usage: $(basename $0) [-o outfile] <tree-ish> [<path>...]"
}


dir="${PWD##*/}"


while getopts "o:h" opts; do
	case $opts in
	o) shift; outfile=$OPTARG; shift;;
	h) shift; usage;;
	esac
done


[ -z "$outfile" ] && outfile="$dir.tgz"
[ -z "$1" ] && usage


subdir="$(basename ${outfile%.*})"


case "${outfile##*.}" in
tgz)      git archive --prefix="$subdir/" --format=tar "$@" | gzip > "$outfile";;
tb2|tbz2) git archive --prefix="$subdir/" "$@" | bzip2 > "$outfile";;
zip) git archive --prefix="$subdir/" --format=zip -o "$outfile" "$@";;
*)   git archive --prefix="${outfile##*/}/" --format=tar "$@" | tar -C "$(dirname "$outfile")" -xf -;;
esac