files - fix regression with autoguess encoding

src/vs/workbench/services/textfile/common/textFileService.ts

@@ -39,6 +39,7 @@ import { coalesce } from 'vs/base/common/arrays';
 import { trim } from 'vs/base/common/strings';
 import { VSBuffer } from 'vs/base/common/buffer';
 import { ITextSnapshot } from 'vs/editor/common/model';
+import { ITextResourceConfigurationService } from 'vs/editor/common/services/resourceConfiguration';
 
 /**
  * The workbench file service implementation implements the raw file service spec and adds additional methods on top.
@@ -85,7 +86,8 @@ export abstract class TextFileService extends Disposable implements ITextFileSer
 		@IContextKeyService contextKeyService: IContextKeyService,
 		@IDialogService private readonly dialogService: IDialogService,
 		@IFileDialogService private readonly fileDialogService: IFileDialogService,
-		@IEditorService private readonly editorService: IEditorService
+		@IEditorService private readonly editorService: IEditorService,
+		@ITextResourceConfigurationService protected readonly textResourceConfigurationService: ITextResourceConfigurationService
 	) {
 		super();
 

src/vs/workbench/services/textfile/node/textFileService.ts

@@ -70,7 +70,7 @@ export class NodeTextFileService extends TextFileService {
 
 		// read through encoding library
 		const decoder = await toDecodeStream(this.streamToNodeReadable(bufferStream.value), {
-			guessEncoding: options && options.autoGuessEncoding,
+			guessEncoding: (options && options.autoGuessEncoding) || this.textResourceConfigurationService.getValue(resource, 'files.autoGuessEncoding'),
 			overwriteEncoding: detected => this.encoding.getReadEncoding(resource, options, { encoding: detected, seemsBinary: false })
 		});