[lsp] add setting for custom jvm options when running lsp server from vscode plugin

#38

GitOrigin-RevId: f455d792a97b9ed2fc52bce99603c190e96e3d93

Author: darthorimar

kotlin-vscode/client/src/lspClient.ts

@@ -178,7 +178,8 @@ async function getRunningJavaServerLspOptions(): Promise<ServerOptions | null> {
     const extractPath = getContext().asAbsolutePath(path.join('server', 'extracted', 'lib'));
 
     const args: string[] = []
-    args.push(...jvmOptions)
+    args.push(...defaultJvmOptions)
+    args.push(...getUserJvmOptions())
     args.push(
         '-classpath', extractPath + path.sep + '*',
         'com.jetbrains.ls.kotlinLsp.KotlinLspServerKt', '--client',
@@ -196,7 +197,14 @@ async function getRunningJavaServerLspOptions(): Promise<ServerOptions | null> {
     };
 }
 
-const jvmOptions = [
+const jvmOptionsSettingName = 'kotlinLSP.additionalJvmArgs';
+
+function getUserJvmOptions() : string[] {
+    const settings = vscode.workspace.getConfiguration().get<string[]>(jvmOptionsSettingName)
+    return settings ?? []
+}
+
+const defaultJvmOptions = [
     "--add-opens", "java.base/java.io=ALL-UNNAMED",
     "--add-opens", "java.base/java.lang=ALL-UNNAMED",
     "--add-opens", "java.base/java.lang.ref=ALL-UNNAMED",

kotlin-vscode/package.json

@@ -56,6 +56,11 @@
           "type": "string",
           "default": null,
           "description": "A path to the JRE that will be used to run the LSP. It should be at least version 17. If not specified, default java version will be used"
+        },
+        "kotlinLSP.additionalJvmArgs": {
+          "type": "array",
+          "default": [],
+          "description": "Additional JVM arguments to pass to the LSP server"
         }
       }
     },