cln-plugin: Populate the options when we get an init call

plugins/src/lib.rs

@@ -159,7 +159,7 @@ where
                 serde_json::to_value(self.handle_get_manifest(c, state).await?).unwrap()
             }
             messages::Request::Init(c) => {
-                serde_json::to_value(Plugin::<S, I, O>::handle_init(c, state).await?).unwrap()
+                serde_json::to_value(self.handle_init(c, state).await?).unwrap()
             }
             o => panic!("Request {:?} is currently unhandled", o),
         };
@@ -196,9 +196,30 @@ where
     }
 
     async fn handle_init(
-        _call: messages::InitCall,
+        &mut self,
+        call: messages::InitCall,
         _state: Arc<Mutex<S>>,
     ) -> Result<messages::InitResponse, Error> {
+        use options::Value as OValue;
+        use serde_json::Value as JValue;
+
+        // Match up the ConfigOptions and fill in their values if we
+        // have a matching entry.
+
+        for opt in self.options.iter_mut() {
+            if let Some(val) = call.options.get(opt.name()) {
+                opt.value = Some(match (opt.default(), &val) {
+                    (OValue::String(_), JValue::String(s)) => OValue::String(s.clone()),
+                    (OValue::Integer(_), JValue::Number(n)) => OValue::Integer(n.as_i64().unwrap()),
+                    (OValue::Boolean(_), JValue::Bool(n)) => OValue::Boolean(*n),
+
+                    // It's ok to panic, if we get here c-lightning
+                    // has not enforced the option type.
+                    (_, _) => panic!("Mismatching types in options: {:?} != {:?}", opt, val),
+                });
+            }
+        }
+
         Ok(messages::InitResponse::default())
     }
 }

plugins/src/messages.rs

@@ -62,9 +62,8 @@ pub(crate) enum Notification {
 pub struct GetManifestCall {}
 
 #[derive(Deserialize, Debug)]
-pub struct InitCall {
-    pub options: Value,
-    pub configuration: HashMap<String, Value>,
+pub(crate) struct InitCall {
+    pub(crate) options: HashMap<String, Value>,
 }
 
 #[derive(Debug)]

tests/test_cln_rs.py

@@ -24,7 +24,7 @@ def test_plugin_start(node_factory):
     """Start a minimal plugin and ensure it is well-behaved
     """
     bin_path = Path.cwd() / "target" / "debug" / "examples" / "cln-plugin-startup"
-    l1 = node_factory.get_node(options={"plugin": str(bin_path)})
+    l1 = node_factory.get_node(options={"plugin": str(bin_path), 'test-option': 31337})
 
     cfg = l1.rpc.listconfigs()
     p = cfg['plugins'][0]
@@ -32,9 +32,8 @@ def test_plugin_start(node_factory):
     expected = {
         'name': 'cln-plugin-startup',
         'options': {
-            'test-option': 42
+            'test-option': 31337
         },
         'path': None
     }
     assert expected == p
-