spun-live

#!/bin/bash
# simple pacman update notifier
# a very simplistic update notification script written 
# in bash, using notify-send and kdialog. 
TEXTDOMAIN=spun

main() {
  if [[ $1 == '-h' || $1 == '--help' ]]; then
    echo $"Simple pacman update notifier, v0.3"
    echo $"Usage: spun [OPTIONS]"
    echo $"Options: "
    echo $"  -g, --gui              show the kdialog configuration GUI"
    exit 0
  elif [[ $1 == '-g' || $1 == '--gui' ]]; then 
    gui=1
    gui
  fi
  # If the gui is enabled, make sure kdialog is installed
  if [[ $gui == 1 ]]; then
    checkgui || (echo $"kdialog cannot be found"; exit 1)
  fi
  # Check to see if the script is already running
  if [[ -r /tmp/spun/pid ]]; then
    kill -CONT $(cat "$tmpdir/pid" 2>/dev/null) 2>/dev/null && 
      fail $"spun is already running!\nonly one instance can be run at a time."
  fi
  # Calculate seconds to sleep:
  [[ $waittime -le 10080 && $waittime -ge 1 ]] && 
    let sleeptime=$waittime*60 ||
    fail $"Bad value for 'waittime' variable.\nMust be an integer between 1 and 10080."
  [[ $daemon == 1 ]] || dothings && daemon
}

isignored() {
  oifs=$IFS IFS=$'\n'
  local ignoredpkgs=(  $(grep '^ *IgnorePkg' "$pacmanconf" | cut -d '=' -f 2-) )
  IFS=$oifs
  grep -q "^[ ]*$1[ ]*[^ ]*" <<< "${ignoredpkgs[@]}"
}

check() {
  [[ -f $tmpdir ]] || mkdir -p "$tmpdir"
  [[ -e "$tmpdir/local" ]] || ln -s /var/lib/pacman/local "$tmpdir"
  [[ -z $update ]] && eval $update >&2>>"$tmpdir/log"
  eval $check | tee -a "$tmpdir/log"
}

daemon() {
  echo -n $":: Starting spun... "
  mkdir -p $tmpdir
  dothings &
  echo $"                                                     [Done]"
}

checkgui() {
  if test -x $(which kdialog); then
    return 0
  else 
    echo $"Sorry, kdialog cannot be found."
    exit 1
  fi
}

gui() {
  checkgui
  nwaittime=$(kdialog --inputbox $"Minutes to wait between each check for updates:" $waittime \
    --title $"SPUN Config" | sed 's/[^0-9].*//g') 
  if [[ $nwaittime == "" ]]; then nwaittime=$waittime; fi
  if ! [[ $nwaittime -le 10080 && $nwaittime -ge 1 ]]; then
    fail $"The value you specified is invalid."
  else
    sed -i "s/^waittime=.*/waittime=$nwaittime/" ~/.spunrc
  fi
  nicon=$(kdialog --geticon actions --title $"Choose notification icon - SPUN Config")
  if [[ $nicon == "" ]]; then nicon=$icon; fi
  sed -i "s/^icon=.*/icon='$nicon'/" ~/.spunrc && kdialog --msgbox $"Configuration saved.\nThe script must be restarted for changes to take effect." || 
    kdialog --error $"Configuration could not be saved.\nMake sure /etc/spun.conf exists and ~/.spunrc is writable."
  exit 0
}

dothings() {
  [[ $daemon == 1 ]] && echo $BASHPID > "$tmpdir/pid"
  while true; do
    upkgz=( )
    for pkg in $(check); do
      isignored $pkg || upkgz+=( $pkg )
    done
    [[ -n ${upkgz[@]} ]] && notify "${upkgz[@]}"
    sleep $sleeptime
  done
}

notify() {
  npkgz=( )
  for pkg in "$@"; do 
    grep -q " $pkg " <<< "${notified[@]}" || npkgz+=( "$pkg" ) notified+=( " $pkg " )
  done
  [[ -n "${npkgz[@]}" ]] && eval $notify $n_opts $"'There are updates available!'" \
    \"$"Run 'sudo pacman -Syu' to update.\n \
<a href=http://chakraos.org/wiki/index.php?title=Pacman>Visit the Chakra wiki</a> to learn more about Pacman. \n\
Updates are available for the following package(s): \n" "${npkgz[*]}"\"
  [[ -n "${npkgz[@]}" && -n "$playwith" && -n "$audio" ]] && eval $playwith $audio >/dev/null 2>/dev/null &
}

fail() {
  [[ $gui != 1 ]] && printf "$1\n" ||
    kdialog --error "$1"
  exit 1
}

[[ -r /etc/spun.conf ]] && source /etc/spun.conf || fail $"/etc/spun.conf cannot be found or is invalid!"
[[ -r ~/.spunrc ]] && source ~/.spunrc || /bin/cp /etc/spun.conf ~/.spunrc
daemon=${daemon-1} waittime=${waittime-5} notified=( )

main "$@"