bpt : 'backports-enabled apt' - an tiny apt front by razielanarki

bpt.sh

#!/usr/bin/env bash
#============================================================================
# bpt : 'backports-enabled apt' - a tiny apt front by razielanarki
#============================================================================
# auto adds "--target-release $(lsb_release -cs)-backports" where applicable
# (ex.: '--target-release oracular-backports')
#----------------------------------------------------------------------------
# install: move to ~/.local/bin/bpt (or anywhere in PATH)
#----------------------------------------------------------------------------
# usage:
#   $ bpt [task] [...args]
#----------------------------------------------------------------------------
# available task shorthands
#  - bpt      : update                       (when called with no arguments)
#  - bpt up   : update + upgrade      + autopurge
#  - bpt full : update + full-upgrade + autopurge
#  - bpt ls   : list
#  - bpt q    : search
#  - bpt dl   : download
#  - bpt cl   : autoremove (via autopurge)
#  - bpt i    : install
#  - bpt u    : uninstall (via purge)
#  - bpt re   : reinstall
#----------------------------------------------------------------------------
# - environment variables:
#   - BPT_APT    : apt command to invoke                (default:       apt)
#   - BPT_TARGET : target release, eg.: 'proposed' etc  (default: backports)
#----------------------------------------------------------------------------
# shellcheck disable=SC2155 disable=SC2206
#----------------------------------------------------------------------------
shopt -s extglob
#----------------------------------------------------------------------------

function dbg::log { printf "'%s' " "$@"; echo; }
# use colors if called from a tty
function bpt::tput { tty -s && [ "$(tput colors)" -ge 8 ]; }
function sgr { bpt::tput && echo -n $'\033'"[;$(IFS=';' ; echo "${*}")m"; }
function str { echo -n "$(sgr "${@:2}")$1$(sgr)"; }

#--------------------------------------------------------------

# recursively call bpt with each subcommand specified
# (shifting until no args left)
# set env var '_sequence_' for each subpocess step
function bpt::seq { (( n=$# ))
  while (( $# )); do echo; (( ++i ))
    echo "$(str '[' 90)" "$(str $i 36)" 'of' "$(str $n 36)" "$(str ']' 90)"
    "$this" "$1"
  shift; done; exit;
}

#----------------------------------------------------------------------------

declare -g this="$(realpath "$0")"
declare -g exec="sudo"
declare -g call="${BPT_APT:-"apt"}"
declare -g task="${1:-"update"}"
declare -a args=(
  "--target-release"
  "$(lsb_release -cs 2>/dev/null)-${BPT_TARGET:-"backports"}"
)

#--------------------------------------------------------------

[ "$task" ] && shift

case "$task" in
  up)   :; bpt::seq update upgrade      autopurge ;;
  full) :; bpt::seq update full-upgrade autopurge ;;

  ls|list) :; task="list" ;&
  show)    :; unset exec args ;;

  q|search)    :; task="search" ;    unset exec ;;
  dl|download) :; task="download" ;  unset exec ;;
  cl|clean)    :; task="autopurge" ; unset args ;;

  re|readd) :; task="reinstall" ;;
  i|in|add) :; task="install"   ;;
  u|un|del) :; task="purge"     ;;
esac

#--------------------------------------------------------------

ps="${exec:+"#"}"
declare -a logcall=("$(str '->' $(( ${#exec} ? 31 : 32 )) 2)" "$(str "${ps:-"$"}" 90)")
[ "$call" ] && logcall+=("$(str "$call" 32 )")
logcall+=("$(str "$task" 33)")
[ "${args[*]}" ] && logcall+=("$(str "${args[0]}" 34)" "$(str "${args[1]}" 35)")
logcall+=("${@}")

echo -e "${logcall[@]}"

#--------------------------------------------------------------

declare -a aptcall=($exec "$call" "$task" "${args[@]}" "${@}")
# dbg::log "${aptcall[@]}"
"${aptcall[@]}"

#--------------------------------------------------------------
# note to self: this may help sometimes
# -o Debug::pkgProblemResolver=yes
#--------------------------------------------------------------