dmenu_history

#!/bin/sh

cachedir="${XDG_CACHE_HOME:-"$HOME/.cache"}"
pathcache="$cachedir/dmenu_run"
histcache="$cachedir/dmenu_history"

[ ! -e "$cachedir" ] && mkdir -p "$cachedir"
[ ! -e "$histcache" ] && touch "$histcache"

cmd="$( (tac "$histcache"; dmenu_path;) | dmenu "$@" )"

test -n "$cmd" || exit

# remove the cmd from caches before appending to avoid duplicates
for file in "$histcache" "$pathcache"; do
        line="$(grep -nxF "$cmd" "$file")"
        test -n "$line" && sed -e "${line%%:*}d" -i "$file"
done

echo "$cmd" | tee -a "$histcache"