feat: Make application async

src/patch.rs

@@ -16,27 +16,36 @@ pub(crate) struct Patches<T> {
 
 pub(crate) type OptionalPatchesString = OptionalPatches<String>;
 
-fn render(
+async fn render(
     patches: Vec<String>,
-    env: &Environment,
+    env: &Environment<'static>,
     cluster: &Cluster,
     node: &Node,
 ) -> Vec<serde_yaml::Value> {
-    patches
-        .into_iter()
-        .map(|name| {
-            let content = env
-                .get_template(&name)
-                .unwrap()
-                .render(context! {
-                    node,
-                    cluster
-                })
-                .unwrap();
+    let env = env.clone();
+    let cluster = cluster.clone();
+    let node = node.clone();
 
-            serde_yaml::from_str(&content).unwrap()
-        })
-        .collect()
+    // Minijinja will still have blocking I/O internally
+    tokio::task::spawn_blocking(move || {
+        patches
+            .into_iter()
+            .map(move |name| {
+                let content = env
+                    .get_template(&name)
+                    .unwrap()
+                    .render(context! {
+                        node,
+                        cluster
+                    })
+                    .unwrap();
+
+                serde_yaml::from_str(&content).unwrap()
+            })
+            .collect()
+    })
+    .await
+    .unwrap()
 }
 
 impl Patches<String> {
@@ -50,15 +59,15 @@ impl Patches<String> {
         }
     }
 
-    pub(crate) fn render(
+    pub(crate) async fn render(
         self,
-        env: &Environment,
+        env: &Environment<'static>,
         cluster: &Cluster,
         node: &Node,
     ) -> Patches<serde_yaml::Value> {
         Patches {
-            all: render(self.all.clone(), env, cluster, node),
-            control_plane: render(self.control_plane.clone(), env, cluster, node),
+            all: render(self.all.clone(), env, cluster, node).await,
+            control_plane: render(self.control_plane.clone(), env, cluster, node).await,
         }
     }
 }