ZSH wrapper around tarsnap

ts

#!/usr/bin/env zsh

commandIsValid() {
  cmds=( "h" "help" "l" "list" "z" "zip" "rm" "remove" )
  local cmd="$1"

  for e in $cmds[@]; do
    if [[ "$e" == "$cmd" ]]; then
      return 0
    fi
  done

  return 1
}

help() {
  case $1 in
    "" | "h" | "help" )
IFS="" read -r -d "" help <<"USAGE"
Usage: ts <command> [<args>]

Commands:
---------

help   (aliased to h)            Show some help
list   (aliased to l)            List archives or their contents
zip    (aliased to z)            Create an archive
remove (aliased to rm)           Remove an archive

Run `ts help <command>` for help on a specific command.
USAGE
      ;;
    "l" | "list" )
IFS="" read -r -d "" help <<"USAGE"
Usage: ts list [<archive>]

List all archives, or its contents if the archive is passed as argument.
USAGE
      ;;

    "z" | "zip" )
IFS="" read -r -d "" help <<"USAGE"
Usage: ts zip <archive-name> [<contents>]

Create an archive. Contents is a file or a directory. Multiple files or directories
are allowed. If no contents is passed, the file or directory to archive is assumed
to have the same name as the archive.
USAGE
      ;;

    "rm" | "remove" )
IFS="" read -r -d "" help <<"USAGE"
Usage: ts remove <archive-name>

Remove the archive with the specified name. Only one archive can be removed at a time.
USAGE
      ;;
    * )
      echo "\e[31mInvalid command: $1\e[39m"
      help
      exit 1
      ;;
  esac

  echo -n "$help"
}


if [[ $# -eq 0 ]]; then
  help
  exit
fi

local cmd="$1"
shift

if [[ "$cmd" == "h" || "$cmd" == "help" ]]; then
  if [[ $# -eq 0 ]]; then
    echo -n $usage
  else
    help $1
  fi
elif [[ "$cmd" == "l" || "$cmd" == "list" ]]; then
  if [[ $# -eq 0 ]]; then
    tarsnap --list-archives
  else
    tarsnap -tv -f $1
  fi
elif [[ "$cmd" == "z" || "$cmd" == "zip" ]]; then
  local archive="$1"

  if [[ $# -lt 1 ]]; then
    echo "\e[31mYou need to specify the contents of the archive\e[39m"
    help zip
    exit 1
  elif [[ $# -eq 1 ]]; then
    if [[ -a "$1" ]]; then
      if [[ "$archive" =~ ".*/\$" ]]; then
        archive="${archive%?}"
      fi

      archive=${archive##/*/}

      tarsnap -c -f $archive $1
    fi
  elif [[ $# -ge 2 ]]; then
    shift

    for f in $@; do
      if [[ ! -a "$f" ]]; then
        echo "\e[31mNo such file or directory: $f\e[39m"
        exit 1
      fi
    done

    tarsnap -c -f $archive $@
  fi
elif [[ $cmd == "rm" || "$cmd" == "remove" ]]; then
  if [[ $# -eq 0 ]]; then
    echo "\e[31mYou need to specify the name of the archive to delete\e[39m"
    help remove
    exit 1
  elif [[ $# -gt 1 ]]; then
    echo "\e[31mYou can only remove one archive at a time\e[39m"
    help remove
    exit 1
  else
    tarsnap -d -f $1
  fi
else
  echo "\e[31mInvalid command\e[39m"
  help
  exit 1
fi