feat: update ensure_ready to check helm is available (#17)

I want to make sure the changes I'm working on in the ensure_ready don't break anything

Reviewed-on: https://git.nationtech.io/NationTech/harmony/pulls/17
Reviewed-by: taha <taha@noreply.git.nationtech.io>
Co-authored-by: Willem <wrolleman@nationtech.io>
Co-committed-by: Willem <wrolleman@nationtech.io>

harmony/src/domain/topology/k8s_anywhere.rs

@@ -1,3 +1,5 @@
+use std::process::Command;
+
 use async_trait::async_trait;
 use inquire::Confirm;
 use log::{info, warn};
@@ -11,7 +13,7 @@ use crate::{
     topology::LocalhostTopology,
 };
 
-use super::{Topology, k8s::K8sClient};
+use super::{HelmCommand, Topology, k8s::K8sClient};
 
 struct K8sState {
     _client: K8sClient,
@@ -28,6 +30,29 @@ pub struct K8sAnywhereTopology {
 }
 
 impl K8sAnywhereTopology {
+    pub fn new() -> Self {
+        Self {
+            k8s_state: OnceCell::new(),
+        }
+    }
+
+    fn is_helm_available(&self) -> Result<(), String> {
+        let version_result = Command::new("helm")
+            .arg("version")
+            .output()
+            .map_err(|e| format!("Failed to execute 'helm -version': {}", e))?;
+
+        if !version_result.status.success() {
+            return Err("Failed to run 'helm -version'".to_string());
+        }
+
+        // Print the version output
+        let version_output = String::from_utf8_lossy(&version_result.stdout);
+        println!("Helm version: {}", version_output.trim());
+
+        Ok(())
+    }
+
     async fn try_load_system_kubeconfig(&self) -> Option<K8sClient> {
         todo!("Use kube-rs default behavior to load system kubeconfig");
     }
@@ -126,15 +151,25 @@ impl Topology for K8sAnywhereTopology {
     }
 
     async fn ensure_ready(&self) -> Result<Outcome, InterpretError> {
-        match self
+       let k8s_state = self
             .k8s_state
             .get_or_try_init(|| self.try_get_or_install_k8s_client())
-            .await?
-        {
-            Some(k8s_state) => Ok(Outcome::success(k8s_state.message.clone())),
-            None => Err(InterpretError::new(
+            .await?;
+
+        let k8s_state: &K8sState = k8s_state
+            .as_ref()
+            .ok_or(InterpretError::new(
                 "No K8s client could be found or installed".to_string(),
-            )),
+            ))?;
+        
+        match self.is_helm_available() {
+            Ok(()) => Ok(Outcome::success(format!(
+                        "{} + helm available",
+                        k8s_state.message.clone()
+                        ))),
+            Err(_) => Err(InterpretError::new("helm unavailable".to_string())),
         }
     }
 }
+
+impl HelmCommand for K8sAnywhereTopology {}