extract

#!/bin/bash
#
# Extract from an archive (optionally compressed) with full path
#
# May 2014, yaswant.pradhan
# -----------------------------------------------------------------------------

usage() {
cat <<EOF
usage:
    ${0##*/} filename

Supported file types auto-detected by file extension:

.bz2, .tar.bz2, .tbz2, .tbz:
        bzip2 compressed file or archive -> b[un]zip2 or tar.

.gz, .tar.gz, .tgz:
        GNU zip (gzip) compressed file or archive -> parallel gzip (pigz)
        or tar.

.pax:   portable archive exchange (POSIX) archive -> tar or pax.
.rar:   Roshal Archive (aproprietary archive file format) using unrar.
.tar:   tape archive (tar) -> tar.

.xz, .lzma:
        general-purpose data compression with a high compression ratio.

.zip:   ZIP archive (MS-DOS) -> [un]xz.
.Z:     adaptive Lempel-Ziv coding compress file -> [un]compress.
.7z:    general-purpose data compression supports many compression methods
        (LZMA[2], PPDM, BCJ[2], BZip2, Deflate) used by other compression
        tools to compress data.
EOF
}

[ $# -lt 1 ] && usage && exit

command -v unrar &>/dev/null || export PATH=$PATH:~fra6/pkg/rar

# Extract file/archive:
if [ -f "$1" ]; then
  case $1 in
    *.tar.bz2 | *.tbz2 | *.tbz)
        tar xvjf "$1"
        ;;
    *.tar.gz | *.tgz)
        tar xvf "$1" -I /usr/bin/pigz --totals
        ;;
    *.tar | *.pax | *.tar.xz)
        tar xvf "$1"
        ;;
    *.bz2)
        bunzip2 "$1"
        ;;
    *.gz)
        pigz -dk "$1"
        ;;
    *.xz | *.lzma)
        xz -dk "$1"
        ;;
    *.zip)
        unzip "$1"
        ;;
    *.Z)
        uncompress "$1"
        ;;
    *.rar)
        unrar x "$1"
        ;;
    *.7z)
        ~fra6/pkg/7zip/bin/7z x "$1"
        ;;
    *)
        printf "%s: '%s' cant be restored.\n" "${0##*/}" "$1" && exit 2
        ;;
  esac
else
  printf "%s: Error: %s is not a valid file.\n" "${0##*/}" "$1" && exit 1
fi