Add auto-updater for Swift-MesonLSP

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## next
 
 - Add configuration options specific for Swift-MesonLSP.
+- Add auto-updater for Swift-MesonLSP.
 
 ## 1.13.0
 

src/extension.ts

@@ -253,6 +253,8 @@ export async function activate(ctx: vscode.ExtensionContext) {
         }
       }),
     );
+
+    await client.update(ctx);
     ctx.subscriptions.push(client);
     client.start();
     await client.reloadConfig();

src/lsp/common.ts

@@ -4,20 +4,20 @@ import { LanguageServer } from "../types";
 import { SwiftMesonLspLanguageClient } from "./swift-mesonlsp";
 import { Uri } from "vscode";
 
+export function serverToClass(server: LanguageServer): any {
+  switch (server) {
+    case "Swift-MesonLSP":
+      return SwiftMesonLspLanguageClient;
+    default:
+      return null;
+  }
+}
+
 export async function createLanguageServerClient(
   server: LanguageServer,
   download: boolean,
   context: vscode.ExtensionContext,
 ): Promise<LanguageServerClient | null> {
-  const serverToClass = (server: LanguageServer) => {
-    switch (server) {
-      case "Swift-MesonLSP":
-        return SwiftMesonLspLanguageClient;
-      default:
-        return null;
-    }
-  };
-
   const klass = serverToClass(server);
   if (klass == null) {
     return null;
@@ -54,5 +54,5 @@ export async function createLanguageServerClient(
     }
   }
 
-  return new klass(languageServerPath, context);
+  return new klass(languageServerPath, context, klass.version);
 }

src/lsp/index.ts

@@ -17,7 +17,7 @@ import {
 } from "vscode-languageclient/node";
 import * as storage from "../storage";
 import { LanguageServer } from "../types";
-import { getOutputChannel } from "../utils";
+import { serverToClass } from "./common";
 
 export abstract class LanguageServerClient {
   private static readonly clientOptions: LanguageClientOptions = {
@@ -27,6 +27,7 @@ export abstract class LanguageServerClient {
   private readonly context: vscode.ExtensionContext;
 
   protected languageServerPath: vscode.Uri | null;
+  protected referenceVersion: string;
   readonly server: LanguageServer;
 
   static readonly repoURL: string;
@@ -36,10 +37,16 @@ export abstract class LanguageServerClient {
   protected abstract get debugExe(): Executable;
   protected abstract get runExe(): Executable;
 
-  protected constructor(server: LanguageServer, languageServerPath: vscode.Uri, context: vscode.ExtensionContext) {
+  protected constructor(
+    server: LanguageServer,
+    languageServerPath: vscode.Uri,
+    context: vscode.ExtensionContext,
+    referenceVersion: string,
+  ) {
     this.server = server;
     this.languageServerPath = languageServerPath;
     this.context = context;
+    this.referenceVersion = referenceVersion;
   }
 
   private static cachedLanguageServer(server: LanguageServer, context: vscode.ExtensionContext): vscode.Uri | null {
@@ -205,4 +212,18 @@ export abstract class LanguageServerClient {
     };
     await this.ls!.sendNotification(DidChangeConfigurationNotification.type, params);
   }
+
+  async update(context: vscode.ExtensionContext): Promise<void> {
+    const lspDir = storage.uri(storage.Location.LSP, context).fsPath;
+    const versionFile = path.join(lspDir, "version");
+    if (!fs.existsSync(versionFile)) return; // Either we use binaries from PATH or something is broken.
+
+    const currentVersion = fs.readFileSync(versionFile, { encoding: "utf-8" });
+    if (currentVersion == this.referenceVersion) return;
+
+    vscode.window.showInformationMessage(`Updating language server to ${this.referenceVersion}`);
+    this.dispose();
+    await serverToClass(this.server).download(this.server, "2.4.4", context);
+    this.restart();
+  }
 }

src/lsp/swift-mesonlsp.ts

@@ -38,8 +38,8 @@ export class SwiftMesonLspLanguageClient extends LanguageServerClient {
     };
   }
 
-  constructor(languageServerPath: vscode.Uri, context: vscode.ExtensionContext) {
-    super("Swift-MesonLSP", languageServerPath, context);
+  constructor(languageServerPath: vscode.Uri, context: vscode.ExtensionContext, referenceVersion: string) {
+    super("Swift-MesonLSP", languageServerPath, context, referenceVersion);
   }
 
   static override artifact(): { url: string; hash: string } | null {