#!/usr/bin/env sh

set -e

edit_directory="$HOME/.cache/edit/"

filehash=$(readlink -fn "$1" | md5sum | awk '{ print $1 }')
filedirectory="$edit_directory/$filehash/"

mkdir -p "$filedirectory"

basename=$(basename "$1")
filepath=$(realpath -s "$filedirectory/$basename")

user=$(id -un)
group=$(id -gn)

echo "Editing $1 in $filepath as $user:$group"

sudo test -e "$1" && (
    sudo cp -i "$1" "$filepath"
    sudo chown "$user":"$group" "$filepath"
) || (
    touch "$filepath"
)

$EDITOR "$filepath"

sudo cp "$filepath" "$1"

rm "$filepath"
rm -rd "$filedirectory"