Working hello world lsp

analyzer/Cargo.toml

@@ -7,3 +7,7 @@ license = "Apache-2.0"
 repository = "https://github.com/mist-go/mist"
 keywords = ["language-server", "language", "mist"]
 categories = ["language-servers"]
+
+[dependencies]
+tokio = { version = "1.52.3", features = ["full", "macros", "rt", "rt-multi-thread"] }
+tower-lsp = "0.20.0"

analyzer/src/lib.rs

@@ -1,3 +1,34 @@
-pub fn start() {
-    println!("test");
+use tower_lsp::jsonrpc::Result;
+use tower_lsp::lsp_types::*;
+use tower_lsp::{Client, LanguageServer, LspService, Server};
+
+#[derive(Debug)]
+struct Backend {
+    client: Client,
+}
+
+#[tower_lsp::async_trait]
+impl LanguageServer for Backend {
+    async fn initialize(&self, _: InitializeParams) -> Result<InitializeResult> {
+        Ok(InitializeResult::default())
+    }
+
+    async fn initialized(&self, _: InitializedParams) {
+        self.client
+            .log_message(MessageType::INFO, "server initialized!")
+            .await;
+    }
+
+    async fn shutdown(&self) -> Result<()> {
+        Ok(())
+    }
+}
+
+#[tokio::main]
+pub async fn start() {
+    let stdin = tokio::io::stdin();
+    let stdout = tokio::io::stdout();
+
+    let (service, socket) = LspService::new(|client| Backend { client });
+    Server::new(stdin, stdout, socket).serve(service).await;
 }