add server path configuration option

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+### Added
+
+- Added configuration `luau-lsp.server.path` (default: `""`) which allows the use of locally installed `luau-lsp` binaries. ([#897](https://github.com/JohnnyMorganz/luau-lsp/pull/897))
+
 ### Changed
 
 - Sync to upstream Luau 0.659

editors/code/package.json

@@ -151,6 +151,11 @@
           "scope": "window",
           "default": "off"
         },
+        "luau-lsp.server.path": {
+          "markdownDescription": "Path to the Luau LSP server binary. If not provided, uses the binary included in the extension.",
+          "type": "string",
+          "default": ""
+        },
         "luau-lsp.ignoreGlobs": {
           "markdownDescription": "Diagnostics will not be reported for any file matching these globs unless the file is currently open",
           "type": "array",

editors/code/src/extension.ts

@@ -181,11 +181,27 @@ const startLanguageServer = async (context: vscode.ExtensionContext) => {
     }
   }
 
-  const serverBinPath = vscode.Uri.joinPath(
-    context.extensionUri,
-    "bin",
-    os.platform() === "win32" ? "server.exe" : "server",
-  ).fsPath;
+  const serverBinConfig = vscode.workspace
+    .getConfiguration("luau-lsp.server")
+    .get("path", "");
+
+  const uri = vscode.Uri.file(serverBinConfig);
+  let serverBinPath;
+
+  if (await utils.exists(uri)) {
+    serverBinPath = uri.fsPath;
+  } else {
+    if (serverBinConfig !== "") {
+      vscode.window.showWarningMessage(
+        `Server binary at path \`${serverBinConfig}\` does not exist, falling back to bundled binary`,
+      );
+    }
+    serverBinPath = vscode.Uri.joinPath(
+      context.extensionUri,
+      "bin",
+      os.platform() === "win32" ? "server.exe" : "server",
+    ).fsPath;
+  }
 
   const run: Executable = {
     command: serverBinPath,