add explicit function to register v1 file system provider, #47475

src/vs/vscode.proposed.d.ts

@@ -304,6 +304,7 @@ declare module 'vscode' {
 
 	export namespace workspace {
 		export function registerFileSystemProvider(scheme: string, provider: FileSystemProvider, newProvider?: FileSystemProvider2): Disposable;
+		export function registerDeprecatedFileSystemProvider(scheme: string, provider: FileSystemProvider): Disposable;
 	}
 
 	//#endregion

src/vs/workbench/api/node/extHost.api.impl.ts

@@ -569,6 +569,9 @@ export function createApiFactory(
 			registerFileSystemProvider: proposedApiFunction(extension, (scheme, provider, newProvider?) => {
 				return extHostFileSystem.registerFileSystemProvider(scheme, provider, newProvider);
 			}),
+			registerDeprecatedFileSystemProvider: proposedApiFunction(extension, (scheme, provider) => {
+				return extHostFileSystem.registerDeprecatedFileSystemProvider(scheme, provider);
+			}),
 			registerSearchProvider: proposedApiFunction(extension, (scheme, provider) => {
 				return extHostSearch.registerSearchProvider(scheme, provider);
 			})

src/vs/workbench/api/node/extHostFileSystem.ts

@@ -165,6 +165,10 @@ export class ExtHostFileSystem implements ExtHostFileSystemShape {
 		extHostLanguageFeatures.registerDocumentLinkProvider('*', this._linkProvider);
 	}
 
+	registerDeprecatedFileSystemProvider(scheme: string, provider: vscode.FileSystemProvider) {
+		return this.registerFileSystemProvider(scheme, null, new FileSystemProviderShim(provider));
+	}
+
 	registerFileSystemProvider(scheme: string, provider: vscode.FileSystemProvider, newProvider: vscode.FileSystemProvider2) {
 		if (newProvider && newProvider._version === 6) {
 			return this._doRegisterFileSystemProvider(scheme, newProvider);