Bump version to 0.2.0, add --version and --help CLI flags

- Version 0.2.0 with all new features
- Add -v/--version flag to display version
- Add -h/--help flag with keybindings overview
- Show version in title bar and help overlay

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zfsdu"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 description = "ncdu-like disk usage viewer for ZFS with snapshot management"
 authors = ["Florian Schermer"]

src/main.rs

@@ -13,8 +13,30 @@ use crossterm::{
 use std::time::Duration;
 use ratatui::{backend::CrosstermBackend, Terminal};
 use std::io;
+use std::env;
+
+const VERSION: &str = env!("CARGO_PKG_VERSION");
 
 fn main() -> Result<()> {
+    // Handle command line arguments
+    let args: Vec<String> = env::args().collect();
+    if args.len() > 1 {
+        match args[1].as_str() {
+            "-v" | "--version" => {
+                println!("zfsdu {}", VERSION);
+                return Ok(());
+            }
+            "-h" | "--help" => {
+                print_help();
+                return Ok(());
+            }
+            _ => {
+                eprintln!("Unknown option: {}", args[1]);
+                eprintln!("Use --help for usage information");
+                std::process::exit(1);
+            }
+        }
+    }
     enable_raw_mode()?;
     let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
@@ -39,6 +61,35 @@ fn main() -> Result<()> {
     Ok(())
 }
 
+fn print_help() {
+    println!("zfsdu {} - ZFS Disk Usage Viewer", VERSION);
+    println!();
+    println!("USAGE:");
+    println!("    zfsdu [OPTIONS]");
+    println!();
+    println!("OPTIONS:");
+    println!("    -h, --help       Print help information");
+    println!("    -v, --version    Print version information");
+    println!();
+    println!("KEYBINDINGS:");
+    println!("    ↑/k, ↓/j         Navigate up/down");
+    println!("    Enter/l          Expand/collapse dataset");
+    println!("    Space            Mark/unmark snapshot");
+    println!("    +/-/*            Select/unselect/invert");
+    println!("    s                Toggle sort (Size/Date/Name)");
+    println!("    /                Search");
+    println!("    f                Filter");
+    println!("    d                Delete marked snapshots");
+    println!("    D                Toggle dry-run mode");
+    println!("    a                Toggle auto-refresh");
+    println!("    r                Refresh");
+    println!("    ?                Help");
+    println!("    q                Quit");
+    println!();
+    println!("CONFIG:");
+    println!("    ~/.config/zfsdu/config.toml");
+}
+
 fn run_app<B: ratatui::backend::Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
     loop {
         terminal.draw(|f| ui::draw(f, app))?;

src/ui.rs

@@ -52,10 +52,12 @@ pub fn draw(f: &mut Frame, app: &mut App) {
     }
 }
 
+const VERSION: &str = env!("CARGO_PKG_VERSION");
+
 fn draw_title(f: &mut Frame, area: Rect, app: &App) {
     let (bg, _fg, header, _, _, _, _, _, _, _) = get_colors(app);
 
-    let mut title = " zfsdu ".to_string();
+    let mut title = format!(" zfsdu v{} ", VERSION);
 
     // Show sort mode
     title.push_str(&format!("[Sort: {}] ", app.sort_mode.label()));
@@ -435,7 +437,7 @@ fn draw_help(f: &mut Frame, app: &App) {
     let help = Paragraph::new(help_text.join("\n"))
         .block(
             Block::default()
-                .title(" Help - zfsdu ")
+                .title(format!(" Help - zfsdu v{} ", VERSION))
                 .borders(Borders::ALL)
                 .border_style(Style::default().fg(header)),
         )