niveum/packages/scripts/fzfmenu.sh

#!/usr/bin/env bash
# fzfmenu - fzf as dmenu replacement
# https://github.com/junegunn/fzf/wiki/Examples#fzf-as-dmenu-replacement
set -efu

input=$(mktemp -u --suffix .fzfmenu.input)
output=$(mktemp -u --suffix .fzfmenu.output)
mkfifo "$input"
mkfifo "$output"
chmod 600 "$input" "$output"

for i in "$@"; do
  case $i in
    -p)
      PROMPT="$2"
      shift
      shift
      break ;;
    -l)
      # no reason to filter number of lines
      shift
      shift
      break ;;
    -i)
      # we do this anyway
      shift
      break ;;
    *)
      echo "Unknown option $1" >&2
      shift ;;
  esac
done

# it's better to use st here (starts a lot faster than pretty much everything else)
st -c fzfmenu -n fzfmenu -g 85x10 \
  -e dash \
  -c "cat $input | fzf --reverse --prompt='${PROMPT+> }' --print-query $* | tee $output" & disown

# handle ctrl+c outside child terminal window
trap 'kill $! 2>/dev/null; rm -f $input $output' EXIT

cat > "$input"
cat "$output"