#!/bin/sh
# shellcheck disable=SC2016,SC2129

tmp=$(mktemp -u)
if [ "$1" = "-d" ]; then
    shift #decompress
    tail -n +11 "$1" | zstd -do "$tmp" &&
    mv "$tmp" "$1"
    chmod +x "$1"
    exit
fi

if [ "$1" = "-p" ]; then
    shift
    prefix="$1 "
    shift
fi

#file header
echo '#!/bin/sh' >> "$tmp"
echo 'out=$(mktemp -t .zzXXXX.'"${1##*.}"\) >> "$tmp"
cat >> "$tmp" << 'EOF'
dir=$(dirname "$0")
tail -n +11 "$0" | zstd -cd > "$out"
chmod +x "$out"
ln -s "$out" "$dir"
trap "res=$?" 0 1 2 3 5 10 13 15
EOF
echo "$prefix"'$dir/$(basename $out) "$@"' >> "$tmp"
cat >> "$tmp" << 'EOF'
rm "$out" "$dir"/$(basename $out)
exit $res
EOF

#compress
zstdmt --ultra -c22 --long "$1" >> "$tmp" || exit 1
mv "$tmp" "$1"
chmod +x "$1"