Subcommand parsing with clap

Author: relrod

Cargo.lock

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+clap = { version = "4.5.50", features = ["derive", "wrap_help"] }

Cargo.toml

@@ -0,0 +1,32 @@
+#[derive(Debug, clap::Subcommand)]
+pub enum Subcommand {
+    /// Create an environment
+    Create(CreateArgs),
+    /// Activate an environment
+    Activate,
+    /// Deactivate an environment
+    Deactivate,
+    /// Run an executable in an environment
+    Run,
+    /// ???
+    Pack,
+    /// ???
+    Unpack,
+    /// List existing environments
+    List,
+    /// Display information about the micromamba setup
+    Info,
+}
+
+#[derive(Debug, clap::Args)]
+pub struct CreateArgs {
+    /// If specified, the name of the environment. If not specified, csm will
+    /// look to robotmk-env.yaml for a "name" field to use instead. As a last
+    /// resort, the current directory name will be used
+    #[arg(short, long)]
+    name: Option<String>,
+}
+
+pub fn run(subcommand: Subcommand) {
+    println!("{:?}", subcommand);
+}

src/env.rs

@@ -1,3 +1,31 @@
+mod env;
+mod robot;
+
+use clap::{Parser, Subcommand};
+
+#[derive(Parser, Debug)]
+#[command(version)]
+/// Checkmk synthetic monitoring command-line tool
+struct Cli {
+    #[command(subcommand)]
+    command: Command,
+}
+
+#[derive(Debug, Subcommand)]
+enum Command {
+    /// Manipulate Robotmk environments
+    #[command(subcommand)]
+    Env(env::Subcommand),
+
+    /// Manage Robotmk robots
+    #[command(subcommand)]
+    Robot(robot::Subcommand),
+}
+
 fn main() {
-    println!("Hello, world!");
+    let cli = Cli::parse();
+    match cli.command {
+        Command::Env(sub) => env::run(sub),
+        Command::Robot(sub) => robot::run(sub),
+    }
 }

src/main.rs

@@ -0,0 +1,18 @@
+#[derive(Debug, clap::Subcommand)]
+pub enum Subcommand {
+    /// Create a Robotmk robot
+    New(CreateArgs),
+
+    /// Run a Robotmk robot
+    Run,
+}
+
+#[derive(Debug, clap::Args)]
+pub struct CreateArgs {
+    /// Directory path at which to create the robot
+    path: String,
+}
+
+pub fn run(subcommand: Subcommand) {
+    println!("{:?}", subcommand);
+}