Make opening files/folders from the terminal only open in the current instance

Previously they would open in every code-server tab/window.

To test:

1. Run code-server
2. Open code-server
3. Open terminal
4. Open another code-server window
5. Run code-server with a file or directory argument

The file or directory should only open from the instance attached to that
terminal.

Index: code-server/lib/vscode/src/vs/server/node/remoteTerminalChannel.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/server/node/remoteTerminalChannel.ts
+++ code-server/lib/vscode/src/vs/server/node/remoteTerminalChannel.ts
@@ -89,7 +89,7 @@ export class RemoteTerminalChannel exten
 		uriTransformer: IURITransformer;
 	}>();
 
-	private readonly _onExecuteCommand = this._register(new Emitter<{ reqId: number; commandId: string; commandArgs: any[] }>());
+	private readonly _onExecuteCommand = this._register(new Emitter<{ reqId: number; terminalId: number; commandId: string; commandArgs: any[] }>());
 	readonly onExecuteCommand = this._onExecuteCommand.event;
 
 	constructor(
@@ -241,20 +241,20 @@ export class RemoteTerminalChannel exten
 		const ipcHandlePath = createRandomIPCHandle();
 		env.VSCODE_IPC_HOOK_CLI = ipcHandlePath;
 		const commandsExecuter: ICommandsExecuter = {
-			executeCommand: <T>(id: string, ...args: any[]): Promise<T> => this._executeCommand(id, args, uriTransformer)
+			executeCommand: <T>(commandId: string, ...args: any[]): Promise<T> => this._executeCommand(terminalId, commandId, args, uriTransformer)
 		};
 		const cliServer = new CLIServerBase(commandsExecuter, this._logService, ipcHandlePath);
 
-		const id = await this._ptyService.createProcess(shellLaunchConfig, initialCwd, args.cols, args.rows, args.unicodeVersion, env, baseEnv, args.options, args.shouldPersistTerminal, args.workspaceId, args.workspaceName);
-		this._ptyService.onProcessExit(e => e.id === id && cliServer.dispose());
+		const terminalId = await this._ptyService.createProcess(shellLaunchConfig, initialCwd, args.cols, args.rows, args.unicodeVersion, env, baseEnv, args.options, args.shouldPersistTerminal, args.workspaceId, args.workspaceName);
+		this._ptyService.onProcessExit(e => e.id === terminalId && cliServer.dispose());
 
 		return {
-			persistentTerminalId: id,
+			persistentTerminalId: terminalId,
 			resolvedShellLaunchConfig: shellLaunchConfig
 		};
 	}
 
-	private _executeCommand<T>(commandId: string, commandArgs: any[], uriTransformer: IURITransformer): Promise<T> {
+	private _executeCommand<T>(terminalId: number, commandId: string, commandArgs: any[], uriTransformer: IURITransformer): Promise<T> {
 		let resolve!: (data: any) => void;
 		let reject!: (err: any) => void;
 		const result = new Promise<T>((_resolve, _reject) => {
@@ -277,6 +277,7 @@ export class RemoteTerminalChannel exten
 		});
 		this._onExecuteCommand.fire({
 			reqId,
+			terminalId,
 			commandId,
 			commandArgs: serializedCommandArgs
 		});
Index: code-server/lib/vscode/src/vs/workbench/contrib/terminal/browser/remoteTerminalBackend.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/workbench/contrib/terminal/browser/remoteTerminalBackend.ts
+++ code-server/lib/vscode/src/vs/workbench/contrib/terminal/browser/remoteTerminalBackend.ts
@@ -94,10 +94,14 @@ class RemoteTerminalBackend extends Base
 		this._remoteTerminalChannel.onExecuteCommand(async e => {
 			const reqId = e.reqId;
 			const commandId = e.commandId;
+			const terminalId = e.terminalId;
 			if (!allowedCommands.includes(commandId)) {
 				this._remoteTerminalChannel.sendCommandResult(reqId, true, 'Invalid remote cli command: ' + commandId);
 				return;
 			}
+			if (typeof terminalId !== "undefined" && !this._ptys.has(terminalId)) {
+				return
+			}
 			const commandArgs = e.commandArgs.map(arg => revive(arg));
 			try {
 				const result = await this._commandService.executeCommand(e.commandId, ...commandArgs);
Index: code-server/lib/vscode/src/vs/workbench/contrib/terminal/common/remoteTerminalChannel.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/workbench/contrib/terminal/common/remoteTerminalChannel.ts
+++ code-server/lib/vscode/src/vs/workbench/contrib/terminal/common/remoteTerminalChannel.ts
@@ -88,8 +88,8 @@ export class RemoteTerminalChannelClient
 	get onProcessOrphanQuestion(): Event<{ id: number }> {
 		return this._channel.listen<{ id: number }>('$onProcessOrphanQuestion');
 	}
-	get onExecuteCommand(): Event<{ reqId: number; commandId: string; commandArgs: any[] }> {
-		return this._channel.listen<{ reqId: number; commandId: string; commandArgs: any[] }>('$onExecuteCommand');
+	get onExecuteCommand(): Event<{ reqId: number; terminalId: number; commandId: string; commandArgs: any[] }> {
+		return this._channel.listen<{ reqId: number; terminalId: number; commandId: string; commandArgs: any[] }>('$onExecuteCommand');
 	}
 	get onDidRequestDetach(): Event<{ requestId: number; workspaceId: string; instanceId: number }> {
 		return this._channel.listen<{ requestId: number; workspaceId: string; instanceId: number }>('$onDidRequestDetach');