Fix duplicate files opening with folder parameter

When using a query parameter without a scheme, the scheme defaults to
`file`. This results in the files in the explorer being technically
different from the file picker files because they are file:// instead of
vscode-remote://, causing the same file to open twice and causing
numerous issues.

Normally the file explorer wouldn't even load at all in this case but we
provide a file service for file:// URLs as a failsafe for certain files
that wouldn't load correctly in the past. These files load fine now
using the vscode-remote scheme, so I'm also removing that service.

Related: #1351.
Fixes #1294.

scripts/vscode.patch

@@ -76,6 +76,46 @@ index 2c64061da7..c0ef8faedd 100644
  		} catch (err) {
  			// Do nothing. If we can't read the file we have no
  			// language pack config.
+diff --git a/src/vs/code/browser/workbench/workbench.ts b/src/vs/code/browser/workbench/workbench.ts
+index a599f5a7eb..ec7ccd43f8 100644
+--- a/src/vs/code/browser/workbench/workbench.ts
++++ b/src/vs/code/browser/workbench/workbench.ts
+@@ -298,35 +298,6 @@ class WorkspaceProvider implements IWorkspaceProvider {
+ 	let workspace: IWorkspace;
+ 	let payload = Object.create(null);
+ 
+-	const query = new URL(document.location.href).searchParams;
+-	query.forEach((value, key) => {
+-		switch (key) {
+-
+-			// Folder
+-			case WorkspaceProvider.QUERY_PARAM_FOLDER:
+-				workspace = { folderUri: URI.parse(value) };
+-				foundWorkspace = true;
+-				break;
+-
+-			// Workspace
+-			case WorkspaceProvider.QUERY_PARAM_WORKSPACE:
+-				workspace = { workspaceUri: URI.parse(value) };
+-				foundWorkspace = true;
+-				break;
+-
+-			// Empty
+-			case WorkspaceProvider.QUERY_PARAM_EMPTY_WINDOW:
+-				workspace = undefined;
+-				foundWorkspace = true;
+-				break;
+-
+-			// Payload
+-			case WorkspaceProvider.QUERY_PARAM_PAYLOAD:
+-				payload = JSON.parse(value);
+-				break;
+-		}
+-	});
+-
+ 	// If no workspace is provided through the URL, check for config attribute from server
+ 	if (!foundWorkspace) {
+ 		if (config.folderUri) {
 diff --git a/src/vs/platform/environment/common/environment.ts b/src/vs/platform/environment/common/environment.ts
 index abd1e33b18..bf75952ce1 100644
 --- a/src/vs/platform/environment/common/environment.ts
@@ -680,7 +720,7 @@ index 4781f22676..25143a97c0 100644
  				throw new Error(`Cannot load module '${request}'`);
  			}
 diff --git a/src/vs/workbench/browser/web.main.ts b/src/vs/workbench/browser/web.main.ts
-index 94e7052574..4219adda2c 100644
+index 94e7052574..7e5563b417 100644
 --- a/src/vs/workbench/browser/web.main.ts
 +++ b/src/vs/workbench/browser/web.main.ts
 @@ -49,6 +49,7 @@ import { IndexedDBLogProvider } from 'vs/workbench/services/log/browser/indexedD
@@ -699,14 +739,6 @@ index 94e7052574..4219adda2c 100644
  	}
  
  	private registerListeners(workbench: Workbench, storageService: BrowserStorageService): void {
-@@ -245,6 +247,7 @@ class BrowserMain extends Disposable {
- 			// Remote file system
- 			const remoteFileSystemProvider = this._register(new RemoteFileSystemProvider(remoteAgentService));
- 			fileService.registerProvider(Schemas.vscodeRemote, remoteFileSystemProvider);
-+			fileService.registerProvider(Schemas.file, remoteFileSystemProvider);
- 
- 			if (!this.configuration.userDataProvider) {
- 				const remoteUserDataUri = this.getRemoteUserDataUri();
 diff --git a/src/vs/workbench/common/resources.ts b/src/vs/workbench/common/resources.ts
 index c509716fc4..e416413084 100644
 --- a/src/vs/workbench/common/resources.ts

src/node/server.ts

@@ -10,7 +10,6 @@ import * as tls from "tls";
 import * as url from "url";
 import * as util from "util";
 import { Emitter } from "vs/base/common/event";
-import { sanitizeFilePath } from "vs/base/common/extpath";
 import { Schemas } from "vs/base/common/network";
 import { URI, UriComponents } from "vs/base/common/uri";
 import { generateUuid } from "vs/base/common/uuid";
@@ -574,6 +573,7 @@ export class MainServer extends Server {
 	}
 
 	private async getRoot(request: http.IncomingMessage, parsedUrl: url.UrlWithParsedQuery): Promise<Response> {
+		const remoteAuthority = request.headers.host as string;
 		const filePath = path.join(this.serverRoot, "browser/workbench.html");
 		let [content, startPath] = await Promise.all([
 			util.promisify(fs.readFile)(filePath, "utf8"),
@@ -582,14 +582,14 @@ export class MainServer extends Server {
 				{ path: parsedUrl.query.folder, workspace: false },
 				(await this.readSettings()).lastVisited,
 				{ path: this.options.openUri }
-			]),
+			], remoteAuthority),
 			this.servicesPromise,
 		]);
 
 		if (startPath) {
 			this.writeSettings({
 				lastVisited: {
-					path: startPath.uri.fsPath,
+					path: startPath.uri,
 					workspace: startPath.workspace
 				},
 			});
@@ -598,14 +598,13 @@ export class MainServer extends Server {
 		const logger = this.services.get(ILogService) as ILogService;
 		logger.info("request.url", `"${request.url}"`);
 
-		const remoteAuthority = request.headers.host as string;
 		const transformer = getUriTransformer(remoteAuthority);
 
 		const environment = this.services.get(IEnvironmentService) as IEnvironmentService;
 		const options: Options = {
 			WORKBENCH_WEB_CONFIGURATION: {
-				workspaceUri: startPath && startPath.workspace ? transformer.transformOutgoing(startPath.uri) : undefined,
+				workspaceUri: startPath && startPath.workspace ? URI.parse(startPath.uri) : undefined,
-				folderUri: startPath && !startPath.workspace ? transformer.transformOutgoing(startPath.uri) : undefined,
+				folderUri: startPath && !startPath.workspace ? URI.parse(startPath.uri) : undefined,
 				remoteAuthority,
 				logLevel: getLogLevel(environment),
 			},
@@ -631,9 +630,8 @@ export class MainServer extends Server {
 	 * workspace or a directory are acceptable. Otherwise it must be a file if a
 	 * workspace or a directory otherwise.
 	 */
-	private async getFirstValidPath(startPaths: Array<StartPath | undefined>): Promise<{ uri: URI, workspace?: boolean} | undefined> {
+	private async getFirstValidPath(startPaths: Array<StartPath | undefined>, remoteAuthority: string): Promise<{ uri: string, workspace?: boolean} | undefined> {
 		const logger = this.services.get(ILogService) as ILogService;
-		const cwd = process.env.VSCODE_CWD || process.cwd();
 		for (let i = 0; i < startPaths.length; ++i) {
 			const startPath = startPaths[i];
 			if (!startPath) {
@@ -641,11 +639,20 @@ export class MainServer extends Server {
 			}
 			const paths = typeof startPath.path === "string" ? [startPath.path] : (startPath.path || []);
 			for (let j = 0; j < paths.length; ++j) {
-				const uri = URI.file(sanitizeFilePath(paths[j], cwd));
+				const uri = url.parse(paths[j]);
 				try {
-					const stat = await util.promisify(fs.stat)(uri.fsPath);
+					if (!uri.pathname) {
+						throw new Error(`${paths[j]} is not valid`);
+					}
+					const stat = await util.promisify(fs.stat)(uri.pathname);
 					if (typeof startPath.workspace === "undefined" || startPath.workspace !== stat.isDirectory()) {
-						return { uri, workspace: !stat.isDirectory() };
+						return { uri: url.format({
+							protocol: uri.protocol || "vscode-remote",
+							hostname: remoteAuthority.split(":")[0],
+							port: remoteAuthority.split(":")[1],
+							pathname: uri.pathname,
+							slashes: true,
+						}), workspace: !stat.isDirectory() };
 					}
 				} catch (error) {
 					logger.warn(error.message);