uniunpack

#! /bin/sh

# Universal Unpacker by Artem S. Tashkinov
# v1.4.0 Oct 18 15:35 2014: total rewrite; proper gzip support; no command output :(
# v1.4.1 Oct 26 13:20 2014: file extension normalized
# v1.4.2 Nov 4  04:29 2014: use RAR by default, use -r- for RAR, BASH->SH
# v1.4.3 Mar 7  22:02 2015: use UNRAR by default
# v1.4.4 Tue 04 Nov 2019 01:18:27: prefer p7zip for zip archives
# v1.4.5 Fri Oct 22 2021 15:38:59: zst

test -z "$1" && echo "Need an archive name to proceed" && exit 1
test ! -e "$1" && echo "File '$1' doesn't exist" && exit 1

lower=$(echo "$1" | tr A-Z a-z)

case "$lower" in
	*.tar|*.tbz|*.txz|*.tgz|*.tar.bz2|*.tar.gz|*.tar.xz|*.tar.lz|*.tar.zst)
		tar xf "$1"
		;;
	*.rar)
		unrar x -r- "$1"
		;;
	*.7z)
		7z x "$1"
		;;
	*.bz2)
		bzip2 -kd "$1"
		;;
	*.gz)
		gunzip -k "$1"
		;;
	*.xz)
		xz -dk "$1"
		;;
	*.zip)
		if 7z &> /dev/null; then
			7z x "$1"
		else
			unzip "$1"
		fi
		;;
	*.cpio)
		cpio -i -m -d -F "$1"
		;;
	*.zst)
		zstd -d "$1" # --keep/-k is default
		;;
	*)
		echo "The archive type for '$1' is unknown"
		echo -n "Would you like to try unpacking the archive using 7z (y/n)? "
		read answer
		test "$answer" = "Y" -o "$answer" = "y" && 7z x "$1"
		;;
esac

res=$?
test "$res" -ne 0 && echo "WARNING: Unpacking failed!"
exit "$res"