Lib.rs

(fast select)

Fast TUI app launcher and fuzzy finder for GNU/Linux and *BSD

Table of Contents

• Quickstart
• Install
• Usage
• Configuration
• Troubleshooting
• Contributing
• License

More Info: Detailed Usage Guide

Requirements

Build Requirements:

• Rust 1.89+ stable (NOT nightly)
  • Install: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
  • Verify: rustc --version (should show stable, not nightly)
  • If using nightly: rustup default stable
• Cargo (comes with Rust)

Runtime Requirements:

• GNU/Linux or *BSD
• Terminal emulator

Optional:

• cclip - for clipboard history mode
• chafa - for image previews in cclip mode
• Kitty or Sixel-capable terminal - for best image support

Quickstart

Get up and running in 30 seconds:

# Install with Nix (recommended)
nix run github:Mjoyufull/fsel

# Or the Aur
$ yay -S fsel-git
 # or
$ paru -S fsel-git

# Or build from source
git clone https://github.com/Mjoyufull/fsel && cd fsel
cargo build --release
sudo cp target/release/fsel /usr/local/bin/

# Launch it
fsel

# Use as dmenu replacement
echo -e "Option 1\nOption 2\nOption 3" | fsel --dmenu

# Browse clipboard history (requires cclip)
fsel --cclip

That's it. Type to search, arrow keys to navigate, Enter to launch.

Install

Option 1: Nix Flake (Recommended)

• Build and run with Nix flakes:

  $ nix run github:Mjoyufull/fsel
  

• Add to your profile:

  $ nix profile add github:Mjoyufull/fsel
  

• Add to your flake.nix inputs:

  {
    inputs.fsel.url = "github:Mjoyufull/fsel";
    # ... rest of your flake
  }
  

Option 2: Cargo

• Install from crates.io:

  $ cargo install fsel@2.4.0-seedclay
  

• To update later:

  $ cargo install fsel@2.4.0-seedclay --force
  

• Or install latest version (check releases):

  $ cargo search fsel  # See available versions
  $ cargo install fsel@<version>
  

Option 3: AUR (Arch Linux)

• Install the git version with your favorite AUR helper:

  $ yay -S fsel-git
  # or
  $ paru -S fsel-git
  

• Or manually:

  $ git clone https://aur.archlinux.org/fsel-git.git
  $ cd fsel-git
  $ makepkg -si
  

Option 4: Build from source

• Install Rust stable
• Build:

  $ git clone https://github.com/Mjoyufull/fsel && cd fsel
  $ cargo build --release
  

• Copy target/release/fsel to somewhere in your $PATH
• (Optional) Create a dmenu symlink for drop-in compatibility:

  $ ./create_dmenu_symlink.sh
  

  Or manually: ln -s $(which fsel) ~/.local/bin/dmenu

optional dependencies

• uwsm - Universal Wayland Session Manager (for --uwsm flag)
• systemd - For --systemd-run flag (usually pre-installed)
• cclip - Clipboard manager (for --cclip mode)
• chafa - Terminal image viewer (for image previews in cclip mode)
• Kitty terminal - Recommended for best inline image support (Sixel terminals also supported)
• otter-launcher - Pairs nicely with fsel for a complete launcher setup

Usage

Interactive Mode

Run fsel from a terminal to open the interactive TUI launcher.

Features

• Smart Matching: Searches names, descriptions, keywords, and categories
• Smart Ranking: Apps ranked by frequency and recent usage
• Desktop Filtering: Respects OnlyShowIn/NotShowIn fields
• PATH Executables: Optionally show CLI tools from $PATH
• Match Modes: Fuzzy (default) or exact matching
• Pin/Favorite Apps: Press Ctrl-Space to pin apps - they'll always appear first (marked with 📌)
• Custom Keybinds: All keyboard shortcuts are configurable

Navigation

Keyboard:

• Type to search/filter applications
• ↑/↓ or Ctrl-P/Ctrl-N to navigate up/down
• ←/→ to jump to top/bottom of list
• Enter or Ctrl-Y to launch selected application
• Ctrl-Space to pin/favorite selected app (pinned apps appear first)
• Esc or Ctrl-Q to exit
• Backspace to remove characters from search

Mouse:

• Hover over applications to select them
• Click on an application to launch it
• Scroll wheel to scroll through the application list
• All mouse interactions work alongside keyboard navigation

Direct Launch Mode

Launch applications directly from the command line without opening the TUI:

# Launch Firefox directly
fsel -p firefox

# Launch first match for "terminal"
fsel -p terminal

# Works with partial names
fsel -p fire  # Finds Firefox

# Combine with launch options
fsel --uwsm -p discord
fsel --systemd-run -vv -p code

Pre-filled Search Mode

Open the TUI with a pre-filled search string. Works with app launcher, dmenu, and cclip modes:

# Open TUI with "firefox" already searched
fsel -ss firefox

# Multi-word search terms work
fsel -ss web browser

# Combine with other options (must be last)
fsel --uwsm -vv -r -ss text editor

# Works with dmenu mode
echo -e "option1\noption2\noption3" | fsel --dmenu -ss opt

# Works with cclip mode
fsel --cclip -ss image

Dmenu Mode

Fsel includes a full dmenu replacement mode that reads from stdin and outputs selections to stdout:

# Basic dmenu replacement
echo -e "Option 1\nOption 2\nOption 3" | fsel --dmenu

# Display only specific columns (like cut)
ps aux | fsel --dmenu --with-nth 2,11  # Show only PID and command

# Use custom delimiter
echo "foo:bar:baz" | fsel --dmenu --delimiter ":"

# Pipe from any command
ls -la | fsel --dmenu
find . -name "*.rs" | fsel --dmenu
git log --oneline | fsel --dmenu

Dmenu Features

Column Operations:

• --with-nth - Display specific columns
• --accept-nth - Output specific columns
• --match-nth - Match against specific columns
• --delimiter - Custom column separator

Input/Output:

• --password - Mask input for passwords
• --index - Output index instead of text
• --dmenu0 - Null-separated input
• --only-match - Force selection from list

Selection:

• --select - Pre-select by string
• --select-index - Pre-select by index
• --auto-select - Auto-select single match

Modes:

• --prompt-only - Text input without list
• --match-mode=exact - Exact matching only
• Drop-in dmenu replacement (symlink as dmenu)

Clipboard History Mode

• must have cclip

Browse and select from your clipboard history with image previews:

# Browse clipboard history with cclip integration
fsel --cclip

# Filter by tag
fsel --cclip --tag prompt

# List all tags
fsel --cclip --tag list

# List items with specific tag (verbose shows details)
fsel --cclip --tag list prompt -vv

# Clear tag metadata from fsel database
fsel --cclip --tag clear

# Show tag color names in display
fsel --cclip --cclip-show-tag-color-names

Clipboard Features

• Image Previews: Inline rendering (Kitty/Sixel terminals)
• Content Preview: Full text preview panel
• Fuzzy Search: Filter clipboard history
• Smart Copy: Auto-copies selection to clipboard
• Tag System: Organize clipboard items with tags (requires cclip with tag support)
• Requires cclip

Quick Examples

Dmenu mode:

# Simple selection
echo -e "Edit\nView\nDelete" | fsel --dmenu

# Password input
echo -e "pass1\npass2" | fsel --dmenu --password

# Process killer
ps aux | fsel --dmenu --with-nth 2,11 --accept-nth 2 | xargs kill

# Git branch switcher
git branch | fsel --dmenu --select main | xargs git checkout

# Drop-in dmenu replacement
ln -s $(which fsel) ~/.local/bin/dmenu

Scripting:

# SSH picker
grep "^Host " ~/.ssh/config | fsel --dmenu --with-nth 2 | xargs ssh

# File opener
find . -type f | fsel --dmenu | xargs xdg-open

# Window switcher (Sway)
swaymsg -t get_tree | jq -r '..|select(.name)|.name' | fsel --dmenu

See USAGE.md for more examples and advanced usage.

Command Line Options

Usage:
  fsel [OPTIONS]

├─ Core Modes
│  ├─ -p, --program <NAME>         Launch program directly (bypass TUI)
│  ├─ --cclip                      Clipboard history mode
│  └─ --dmenu                      Dmenu-compatible mode
│
├─ Control Flags
│  ├─ -r, --replace                Replace running fsel/cclip instance
│  ├─ -d, --detach                 Detach launched applications (GUI-safe)
│  ├─ -v, --verbose                Increase verbosity (repeatable)
│  ├─ --systemd-run                Launch via systemd-run --user --scope
│  ├─ --uwsm                       Launch via uwsm app
│  ├─ --no-exec                    Print selection to stdout instead of launching
│  └─ -ss <SEARCH>                 Pre-fill TUI search (must be last option)
│
├─ Quick Extras
│  ├─ --clear-history              Clear launch history
│  ├─ --clear-cache                Clear app cache
│  ├─ --refresh-cache              Rescan desktop entries
│  ├─ --filter-desktop[=no]        Respect OnlyShowIn/NotShowIn (default: yes)
│  ├─ --hide-before-typing         Hide list until first character typed
│  ├─ --list-executables-in-path   Include executables from $PATH
│  └─ --match-mode <MODE>          fuzzy | exact (default: fuzzy)
│
├─ Dmenu Mode Options
│  ├─ --dmenu0                     Like --dmenu but null-separated input
│  ├─ --password[=CHAR]            Password mode (mask input)
│  ├─ --index                      Output index instead of text
│  ├─ --with-nth <COLS>            Display only specific columns (e.g. 1,3)
│  ├─ --accept-nth <COLS>          Output only specified columns
│  ├─ --match-nth <COLS>           Match only specified columns
│  ├─ --delimiter <CHAR>           Column delimiter (default: space)
│  ├─ --only-match                 Disallow custom input
│  ├─ --exit-if-empty              Exit if stdin is empty
│  ├─ --select <STRING>            Preselect matching entry
│  ├─ --select-index <N>           Preselect entry by index
│  ├─ --auto-select                Auto-select when one match remains
│  └─ --prompt-only                Input-only mode (no list)
│
├─ Clipboard Mode Options
│  ├─ --cclip                      Clipboard history viewer with previews
│  ├─ --tag <NAME>                 Filter clipboard items by tag
│  ├─ --tag list                   List all tags
│  ├─ --tag list <NAME>            List items with specific tag
│  ├─ --tag clear                  Clear tag metadata from fsel database
│  ├─ --tag wipe                   Wipe ALL tags from cclip entries (cclip 3.2+)
│  └─ --cclip-show-tag-color-names Show tag color names in display
│
└─ General
   ├─ -h                           Show short help
   ├─ -H, --help                   Show detailed help
   └─ -V, --version                Show version info

Launch Methods

• Default: Standard execution
• Sway Integration: Automatically enabled when $SWAYSOCK is set. Uses swaymsg exec to launch applications in the current workspace (requires Sway)
• systemd-run: --systemd-run launches applications in isolated systemd user scopes (requires systemd)
• uwsm: --uwsm launches applications through the Universal Wayland Session Manager (requires uwsm to be installed)

Verbosity Levels

• -v: Show application execution details
• -vv: Show application paths and additional metadata
• -vvv: Show debug information including usage statistics

Configuration

Config file: ~/.config/fsel/config.toml

Basic Setup

# Colors
highlight_color = "LightBlue"
cursor = "█"

# App launcher
terminal_launcher = "alacritty -e"

[app_launcher]
filter_desktop = true              # Filter apps by desktop environment
list_executables_in_path = false   # Show CLI tools from $PATH
hide_before_typing = false         # Hide list until you start typing
match_mode = "fuzzy"               # "fuzzy" or "exact"
confirm_first_launch = false       # Confirm before launching new apps with -p

# Pin/favorite settings
pin_color = "rgb(255,165,0)"       # Color for pin icon (orange)
pin_icon = "📌"                     # Icon for pinned apps

Advanced Options

# UI customization
rounded_borders = true
main_border_color = "White"
apps_border_color = "White"
input_border_color = "White"

# Layout (percentages)
title_panel_height_percent = 30    # Top panel height (10-70%)
input_panel_height = 3             # Input panel height in lines
title_panel_position = "top"       # "top", "middle", or "bottom"

# Dmenu mode
[dmenu]
password_character = "*"
exit_if_empty = false

# Clipboard mode
[cclip]
image_preview = true
hide_inline_image_message = false

# Custom keybinds (optional)
[keybinds]
up = ["up", { key = "k", modifiers = "ctrl" }]
down = ["down", { key = "j", modifiers = "ctrl" }]
select = ["enter"]
exit = ["esc", { key = "q", modifiers = "ctrl" }]
pin = [{ key = "space", modifiers = "ctrl" }]

See config.toml and keybinds.toml for all options with detailed comments.

Window Manager Integration

Sway/i3:

# ~/.config/sway/config
set $menu alacritty --title launcher -e fsel
bindsym $mod+d exec $menu
for_window [title="^launcher$"] floating enable, resize set width 500 height 430, border none

# Clipboard history
bindsym $mod+v exec 'alacritty --title clipboard -e fsel --cclip'

Hyprland:

# ~/.config/hypr/hyprland.conf
bind = $mod, D, exec, alacritty --title launcher -e fsel
windowrule = float, ^(launcher)$
windowrule = size 500 430, ^(launcher)$

dwm/bspwm/any WM:

# Use dmenu mode
bindsym $mod+d exec "fsel --dmenu | xargs swaymsg exec --"

Contributing

Contributions are welcome! Whether you're reporting bugs, suggesting features, or submitting code, we appreciate your help making fsel better.

How to Contribute

1. Bug Reports & Feature Requests: Open an issue on GitHub Issues
2. Pull Requests: Fork the repo, create a feature branch, and submit a PR
3. Code Style: Run cargo fmt and cargo clippy before submitting
4. Testing: Ensure cargo test and cargo build --release pass

Development Workflow

See CONTRIBUTING.md for detailed guidelines on:

• Branch naming conventions
• Commit message format
• Pull request process
• Code review standards
• Release procedures

All contributors are valued and appreciated. Your name will be added to the contributors list, and significant contributions will be highlighted in release notes.

Thank you for helping improve fsel!

Philosophy

fsel is a unified TUI workflow tool built for terminal-centric setups. It combines app launching, dmenu functionality, and clipboard history into one scriptable interface with consistent keybinds and theming.

This means:

• It's built for my workflow first, but PRs for bug fixes and useful features are welcome as long as they fit in scope.
• Older versions and the original gyr exist if you want something more minimal.

Troubleshooting

Apps not showing up?

• Check $XDG_DATA_DIRS includes /usr/share/applications
• Try --filter-desktop=no to disable desktop filtering
• Use -vvv for debug info

Mouse not working?

• Check your terminal supports mouse input
• Try disable_mouse = false in config

Images not showing in cclip mode?

• Use Kitty (best) or Sixel-capable terminal (Foot, WezTerm, etc.)
• Install chafa for image rendering
• Check image_preview = true in config
• Images automatically render inside content panel borders

Fuzzy matching too loose?

• Try --match-mode=exact for stricter matching
• Or set match_mode = "exact" in config

Terminal apps not launching?

• Set terminal_launcher in config
• Example: terminal_launcher = "kitty -e"

Credits

Fork of gyr by Namkhai B.

License

BSD 2-Clause (c) 2020-2022 Namkhai B.