use auto implementation for the version command

Cargo.lock

@@ -520,7 +520,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
 
 [[package]]
-name = "firefish-cli"
+name = "fishctl"
 version = "0.1.0-alpha.1"
 dependencies = [
  "chrono",

Cargo.toml

@@ -1,14 +1,11 @@
 [package]
-name = "firefish-cli"
+name = "fishctl"
+description = "CLI tool for configuring Firefish"
 version = "0.1.0-alpha.1"
 rust-version = "1.74"
 edition = "2021"
 license = "MIT"
 
-[[bin]]
-name = "fishctl"
-path = "src/main.rs"
-
 [dependencies]
 chrono = "0.4"
 clap = { version = "4.5", features = ["derive"] }

src/command/mod.rs

@@ -2,7 +2,6 @@
 
 mod config;
 mod generate;
-mod version;
 
 use clap::{Parser, Subcommand};
 
@@ -16,6 +15,7 @@ pub(crate) enum Error {
 }
 
 #[derive(Parser)]
+#[command(version, about)]
 struct Args {
     #[command(subcommand)]
     command: Commands,
@@ -23,8 +23,6 @@ struct Args {
 
 #[derive(Subcommand)]
 enum Commands {
-    /// Print fishctl version
-    Version,
     /// Modify or validate the config files
     #[command(subcommand)]
     Config(config::Commands),
@@ -37,7 +35,6 @@ pub(super) async fn run() -> Result<(), Error> {
     let args = Args::parse();
 
     match args.command {
-        Commands::Version => version::run(),
         Commands::Config(subcommand) => config::run(subcommand).await?,
         Commands::Generate(subcommand) => generate::run(subcommand)?,
     }

src/command/version.rs

@@ -1,5 +0,0 @@
-//! `version` subcommand
-
-pub(super) fn run() {
-    println!("v{}", env!("CARGO_PKG_VERSION"));
-}