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#!/usr/bin/env bash
# ==================================================
# KoolDots (2026)
# Project URL: https://github.com/LinuxBeginnings
# License: GNU GPLv3
# SPDX-License-Identifier: GPL-3.0-or-later
# ==================================================
# Launch preferred file manager with fallback handling.
# Usage:
# LaunchFileManager.sh "<preferred-file-manager-cmd>" "<preferred-terminal-cmd>"
# Examples:
# LaunchFileManager.sh "thunar" "kitty"
set -u
notify_msg() {
local urgency="${1:-normal}"
local body="${2:-}"
if command -v notify-send >/dev/null 2>&1; then
notify-send -u "$urgency" "KooL Launchers" "$body"
fi
}
trim() {
local value="${1:-}"
value="${value#"${value%%[![:space:]]*}"}"
value="${value%"${value##*[![:space:]]}"}"
printf '%s' "$value"
}
command_bin_from_string() {
local cmd
cmd="$(trim "${1:-}")"
[[ -n "$cmd" ]] || return 1
(
eval "set -- $cmd"
printf '%s' "${1:-}"
) 2>/dev/null
}
command_exists_from_string() {
local bin
bin="$(command_bin_from_string "${1:-}" 2>/dev/null || true)"
[[ -n "$bin" ]] || return 1
command -v "$bin" >/dev/null 2>&1
}
launch_command_string() {
local cmd
cmd="$(trim "${1:-}")"
[[ -n "$cmd" ]] || return 1
if ! command_exists_from_string "$cmd"; then
return 127
fi
(
eval "exec $cmd"
) >/dev/null 2>&1 &
local pid=$!
sleep 0.35
if kill -0 "$pid" >/dev/null 2>&1; then
disown "$pid" >/dev/null 2>&1 || true
return 0
fi
wait "$pid"
local rc=$?
[[ $rc -eq 0 ]]
}
append_unique_candidate() {
local candidate
candidate="$(trim "${1:-}")"
[[ -n "$candidate" ]] || return 0
local existing
for existing in "${CANDIDATES[@]}"; do
[[ "$existing" == "$candidate" ]] && return 0
done
CANDIDATES+=("$candidate")
}
script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
terminal_launcher="$script_dir/LaunchTerminal.sh"
preferred_files="$(trim "${1:-${FILE_MANAGER:-}}")"
preferred_term="$(trim "${2:-${TERMINAL:-kitty}}")"
declare -a CANDIDATES=()
append_unique_candidate "$preferred_files"
append_unique_candidate "thunar"
append_unique_candidate "dolphin"
append_unique_candidate "nautilus"
reported_preferred_issue=0
for candidate in "${CANDIDATES[@]}"; do
if launch_command_string "$candidate"; then
exit 0
fi
if [[ $reported_preferred_issue -eq 0 && -n "$preferred_files" && "$candidate" == "$preferred_files" ]]; then
if ! command_exists_from_string "$preferred_files"; then
notify_msg normal "Preferred file manager '$preferred_files' is not installed. Falling back."
else
notify_msg normal "Preferred file manager '$preferred_files' failed to launch. Falling back."
fi
reported_preferred_issue=1
fi
done
if command -v yazi >/dev/null 2>&1; then
if [[ -x "$terminal_launcher" ]] && "$terminal_launcher" "$preferred_term" "yazi"; then
exit 0
fi
else
notify_msg normal "No GUI file manager was launched and 'yazi' is not installed."
fi
notify_msg critical "Unable to launch file manager. Tried preferred app, thunar, dolphin, nautilus, then terminal + yazi."
exit 1
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