dmenu_launch

#!/bin/bash

font="-*-nu-*-*-*-*-11-*-*-*-*-*-*-*"
term=urxvtc
normbgcolor="#303030"
normfgcolor="#FFFFFF"
selbgcolor="#3465A4"
selfgcolor="#FFFFFF"

cache=~/.cache/dmenu

dmenu_opts=(
  -i
  -b
  -fn "$font"
  -nb "$normbgcolor"
  -nf "$normfgcolor"
  -sb "$selbgcolor"
  -sf "$selfgcolor"
)

regen_cache() {
  find "${paths[@]}" -maxdepth 1 \( -type f -o -type l \) -executable -printf '%f\n' |
      sort -u >"$cache"
}


getbins() {
  IFS=':' read -r -a paths <<< "$PATH"
  for path in "${paths[@]}"; do
    if [[ $path -nt $cache ]]; then
      regen_cache
      break
    fi
  done
  cat "$cache"
}

cmd=$(getbins | dmenu "${dmenu_opts[@]}")

# dispatch!
case $cmd in
  ncmpcpp|htop|vim)   exec $term -name $cmd -e $cmd ;;
  tmux)               exec $term -name tmux -geometry 122x77 -e tmux -L main attach ;;
  *)                  exec $cmd
esac