clipmenu-spmenu/clipmenu

#!/bin/bash

shopt -s nullglob

# We use this to make sure the cache files are sorted bytewise
LC_COLLATE=C

declare -A selections

cache_file=/tmp/clipmenu.$USER/line_cache

# We use tac since we want newest to oldest, and we append in clipmenud
while IFS='|' read -r full_file first_line; do
    selections[$first_line]=$full_file
done < <(tac "$cache_file")

# It's okay to hardcode `-l 8` here as a sensible default without checking
# whether `-l` is also in "$@", because the way that dmenu works allows a later
# argument to override an earlier one. That is, if the user passes in `-l`, our
# one will be ignored.
chosen_line=$(sed 's/^[^|]\+|//' "$cache_file" | tac | uniq | dmenu -l 8 "$@")

[[ $chosen_line ]] || exit 1

for selection in clipboard primary; do
    if type -p xsel >/dev/null 2>&1; then
        xsel -i --"$selection" < "${selections[$chosen_line]}"
    else
        xclip -sel "$selection" < "${selections[$chosen_line]}"
    fi
done