helm/bin/lsarchive

#!/usr/bin/env bash

# Lists the contents of archives.
#
# Adapted from a script by Sorin Ionescu <sorin.ionescu@gmail.com>

if (($# == 0)); then
  cat >&2 <<EOF
usage: $0 [-option] [file ...]

options:
    -v, --verbose    verbose archive listing

Report bugs to <sorin.ionescu@gmail.com>.
EOF
fi

if [[ $1 == -v || $1 == --verbose ]]; then
  verbose=0
  shift
fi

while (($# > 0)); do
  if [[ ! -s $1 ]]; then
    >&2 echo "$0: file not valid: $1"
    shift
    continue
  fi

  case ${1:l} in
    *.tar.gz|*.tgz) tar t${verbose:+v}vzf "$1" ;;
    *.tar.bz2|*.tbz|*.tbz2) tar t${verbose:+v}jf "$1" ;;
    *.tar.xz|*.txz) tar --xz --help &> /dev/null \
      && tar --xz -t${verbose:+v}f "$1" \
      || xzcat "$1" | tar t${verbose:+v}f - ;;
    *.tar.zma|*.tlz) tar --lzma --help &> /dev/null \
      && tar --lzma -t${verbose:+v}f "$1" \
      || lzcat "$1" | tar x${verbose:+v}f - ;;
    *.tar) tar t${verbose:+v}f "$1" ;;
    *.zip) unzip -l${verbose:+v} "$1" ;;
    *.rar) unrar &> /dev/null \
      && unrar ${${verbose:+v}:-l} "$1" \
      || rar ${${verbose:+v}:-l} "$1" ;;
    *.7z) 7za l "$1" ;;
    *) >&2 echo "$0: cannot list: $1"
       success=1
       ;;
  esac

  shift
done