feature(kratactl): rework cli to use subcommands (#268)

crates/ctl/src/cli/host/mod.rs

@@ -0,0 +1,54 @@
+use anyhow::Result;
+use clap::{Parser, Subcommand};
+use tonic::transport::Channel;
+
+use krata::events::EventStream;
+use krata::v1::control::control_service_client::ControlServiceClient;
+
+use crate::cli::host::cpu_topology::HostCpuTopologyCommand;
+use crate::cli::host::identify::HostIdentifyCommand;
+use crate::cli::host::idm_snoop::HostIdmSnoopCommand;
+
+pub mod cpu_topology;
+pub mod identify;
+pub mod idm_snoop;
+
+#[derive(Parser)]
+#[command(about = "Manage the host of the isolation engine")]
+pub struct HostCommand {
+    #[command(subcommand)]
+    subcommand: HostCommands,
+}
+
+impl HostCommand {
+    pub async fn run(
+        self,
+        client: ControlServiceClient<Channel>,
+        events: EventStream,
+    ) -> Result<()> {
+        self.subcommand.run(client, events).await
+    }
+}
+
+#[derive(Subcommand)]
+pub enum HostCommands {
+    CpuTopology(HostCpuTopologyCommand),
+    Identify(HostIdentifyCommand),
+    IdmSnoop(HostIdmSnoopCommand),
+}
+
+impl HostCommands {
+    pub async fn run(
+        self,
+        client: ControlServiceClient<Channel>,
+        events: EventStream,
+    ) -> Result<()> {
+        match self {
+            HostCommands::CpuTopology(cpu_topology) => cpu_topology.run(client).await,
+
+            HostCommands::Identify(identify) => identify.run(client).await,
+
+            HostCommands::IdmSnoop(snoop) => snoop.run(client, events).await,
+        }
+    }
+}