From 67cb37423c6a540dbce43424671c5f4b2481276e Mon Sep 17 00:00:00 2001
From: Radon Rosborough <radon.neon@gmail.com>
Date: Sun, 5 Jul 2020 12:54:05 -0600
Subject: [PATCH] Get clangd working for C/C++/Objective-C

---
 backend/src/api.ts                  |  4 +++-
 backend/src/langs.ts                |  1 +
 frontend/src/app.ts                 | 12 ++++++++++++
 scripts/docker-install-phase3a.bash |  1 +
 4 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/backend/src/api.ts b/backend/src/api.ts
index a92d501..8f596c5 100644
--- a/backend/src/api.ts
+++ b/backend/src/api.ts
@@ -250,7 +250,9 @@ export class Session {
       this.lsp.reader.listen((data) => {
         this.ws.send(JSON.stringify({ event: "lspOutput", output: data }));
       });
-      this.ws.send(JSON.stringify({ event: "lspStarted" }));
+      this.ws.send(
+        JSON.stringify({ event: "lspStarted", root: `/tmp/riju/${this.uuid}` })
+      );
     }
   };
   cleanup = async () => {
diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index 0cd07d3..8cdaa63 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -147,6 +147,7 @@ implement main0 () = ()
     main: "main.c",
     compile: "clang -Wall -Wextra main.c -o main",
     run: "./main",
+    lsp: "clangd",
     template: `#include <stdio.h>
 
 int main() {
diff --git a/frontend/src/app.ts b/frontend/src/app.ts
index 499885a..29ef230 100644
--- a/frontend/src/app.ts
+++ b/frontend/src/app.ts
@@ -22,6 +22,7 @@ const DEBUG = window.location.hash === "#debug";
 interface RijuConfig {
   id: string;
   monacoLang: string;
+  main: string;
   lspInit?: any;
   lspConfig?: any;
   template: string;
@@ -151,6 +152,17 @@ async function main() {
           term.write(message.output);
           return;
         case "lspStarted":
+          if (typeof message.root !== "string") {
+            console.error("Unexpected message from server:", message);
+            return;
+          }
+          editor.setModel(
+            monaco.editor.createModel(
+              editor.getModel()!.getValue(),
+              undefined,
+              monaco.Uri.parse(`file://${message.root}/${config.main}`)
+            )
+          );
           const connection = createMessageConnection(
             new RijuMessageReader(socket!),
             new RijuMessageWriter(socket!)
diff --git a/scripts/docker-install-phase3a.bash b/scripts/docker-install-phase3a.bash
index ea98b4c..97044f3 100755
--- a/scripts/docker-install-phase3a.bash
+++ b/scripts/docker-install-phase3a.bash
@@ -30,6 +30,7 @@ beef
 
 # C/C++
 clang
+clangd
 
 # C#
 mono-mcs