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

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

@@ -0,0 +1,60 @@
+use anyhow::Result;
+use clap::{Parser, ValueEnum};
+use comfy_table::presets::UTF8_FULL_CONDENSED;
+use comfy_table::{Cell, Table};
+use krata::v1::control::{
+    control_service_client::ControlServiceClient, HostCpuTopologyClass, HostCpuTopologyRequest,
+};
+
+use tonic::{transport::Channel, Request};
+
+fn class_to_str(input: HostCpuTopologyClass) -> String {
+    match input {
+        HostCpuTopologyClass::Standard => "Standard".to_string(),
+        HostCpuTopologyClass::Performance => "Performance".to_string(),
+        HostCpuTopologyClass::Efficiency => "Efficiency".to_string(),
+    }
+}
+
+#[derive(ValueEnum, Clone, Debug, PartialEq, Eq)]
+enum HostCpuTopologyFormat {
+    Table,
+}
+
+#[derive(Parser)]
+#[command(about = "Display information about the host CPU topology")]
+pub struct HostCpuTopologyCommand {
+    #[arg(short, long, default_value = "table", help = "Output format")]
+    format: HostCpuTopologyFormat,
+}
+
+impl HostCpuTopologyCommand {
+    pub async fn run(self, mut client: ControlServiceClient<Channel>) -> Result<()> {
+        let response = client
+            .get_host_cpu_topology(Request::new(HostCpuTopologyRequest {}))
+            .await?
+            .into_inner();
+
+        let mut table = Table::new();
+        table.load_preset(UTF8_FULL_CONDENSED);
+        table.set_content_arrangement(comfy_table::ContentArrangement::Dynamic);
+        table.set_header(vec!["id", "node", "socket", "core", "thread", "class"]);
+
+        for (i, cpu) in response.cpus.iter().enumerate() {
+            table.add_row(vec![
+                Cell::new(i),
+                Cell::new(cpu.node),
+                Cell::new(cpu.socket),
+                Cell::new(cpu.core),
+                Cell::new(cpu.thread),
+                Cell::new(class_to_str(cpu.class())),
+            ]);
+        }
+
+        if !table.is_empty() {
+            println!("{}", table);
+        }
+
+        Ok(())
+    }
+}