fzf-menu

#!/usr/bin/env bash

# forked from spikegrobstein/fzf-menu.  MIT license applies.
set -o errexit -o nounset -o pipefail

GREEN_START='\033[01;32m'
COLOR_RESET='\033[0m'
get_selection() {
	{ get_applications; get_programs_in_path; } \
		| fzf \
		--ansi \
		--preview="[[ {} == *'.desktop' ]] && cat \$(echo {} | awk '{print \$NF}') || echo \$(PAGER=cat whatis {})" \
		--preview-window=right:60%:wrap \
		--bind=ctrl-space:toggle-preview \
		--header="Select a program to launch"
}

get_programs_in_path() {
  local find_prog
  local find_args
  # my benchmarks show that GNU find > fd > BSD find
  if [[ -n "${FIND_PROG:-}" ]]; then
	  find_prog=$FIND_PROG
	  find_args=$FIND_ARGS
  elif $(find / -maxdepth 0 -executable &>/dev/null) || command -v gfind &>/dev/null; then
    # GNU find
    find_prog=$(command -v gfind || echo find)
    find_args="-maxdepth 1 -executable -printf %f\n"
  elif command -v fd > /dev/null; then
	  find_prog="fd ."
	  find_args="--max-depth=1 --type=executable --exec basename {} ;"
  else
    # BSD find
    find_prog=find
    find_args="-maxdepth 1 -perm +111 -type f,l -exec basename {} ;"
  fi

  local pathDeduped=$(printf '%s\n' $PATH | tr ':' '\n' | uniq )
  for p in $pathDeduped; do
    $find_prog $p $find_args 2>/dev/null || true
  done \
    | awk '!x[$0]++'
    # awk removes duplicates without sorting.  Thanks https://stackoverflow.com/a/11532197/6100005 \
}

get_applications() {
    local applicationPathsDeduped=$(printf '%s\n' ${XDG_DATA_DIRS:-/usr/share} | tr ':' '\n' | uniq )
    for p in $applicationPathsDeduped; do
		# TODO: support fd
		for app in $(find "$p"/applications -maxdepth 1 -type f,l -name '*.desktop' 2>/dev/null); do
			local appname=$(sed -n '0,/^Name=/{s/^Name=//p}' $app)
			printf "${GREEN_START}$appname${COLOR_RESET} : $app\n"
		done
    done
}

launch() {
	if [[ $1 == *'.desktop' ]]; then
		#exec nohup zsh -c "(gio launch $1) & disown ; sleep 3"
		exec nohup zsh -c "(setsid -f gio launch $1) & disown ; sleep 3"
	else
		if command -v setsid > /dev/null; then
			exec setsid -f $1 > /dev/null 2>&1
		fi
		exec $1
	fi
}

if [[ ${1:-} == "--list-programs" ]]; then
	get_programs_in_path
	exit 0
fi

if selection=$( get_selection ); then
	launch "$(echo $selection | awk '{print $NF}')"
fi