Limit LSP reach to dvc yaml files (#3194)

Author: mattseddon

extension/src/languageClient/index.ts

@@ -17,7 +17,6 @@ export class LanguageClient extends Disposable {
 
     const clientOptions: LanguageClientOptions = {
       documentSelector,
-
       synchronize: {
         fileEvents: workspace.createFileSystemWatcher('**/dvc.yaml')
       }

languageServer/src/documentSelector.ts

@@ -1,17 +1,5 @@
 export const documentSelector = [
   {
-    language: 'yaml'
-  },
-  {
-    pattern: '**/*.{dvc,dvc.lock}'
-  },
-  {
-    language: 'json'
-  },
-  {
-    language: 'toml'
-  },
-  {
-    language: 'python'
+    pattern: '**/dvc.yaml'
   }
 ]

languageServer/src/languageServer.ts

@@ -10,7 +10,8 @@ import {
   SymbolKind,
   DocumentSymbol,
   Connection,
-  Location
+  Location,
+  TextDocumentSyncKind
 } from 'vscode-languageserver/node'
 import { TextDocument } from 'vscode-languageserver-textdocument'
 import { URI } from 'vscode-uri'
@@ -117,7 +118,8 @@ export class LanguageServer {
 
   private onInitialize() {
     const serverCapabilities: ServerCapabilities = {
-      definitionProvider: true
+      definitionProvider: true,
+      textDocumentSync: TextDocumentSyncKind.Incremental
     }
 
     const result: InitializeResult = {