#!/usr/bin/env zsh

emulate -L zsh -eu

local REF_LEN DIR idx stash_ref commit_ref

REF_LEN=8
DIR="$HOME/gitstashes"

git rev-parse

idx="${1:-0}"
stash_ref="$(git rev-parse stash@{$idx} | cut -c-$REF_LEN)"
commit_ref="$(git rev-parse stash@{$idx}~ | cut -c-$REF_LEN)"

git stash show -up "$idx" > \
	"${2:-$DIR}/${PWD//\//__}__${commit_ref}__$stash_ref.diff"