Allow debugging in interactive session with no dir change

Fix #1330

This PR depends on a corresponding PR to PSES to have it handle
null/empty string differently in the non-temp console case.

For the generateLaunchConfig case, we now pass "" as cwd to PSES.
That tells PSES to not change the directory *if* we aren't running
in a temp console.  If we are in a temp console, then use old logic to
set working dir.

Update "PowerShell Interactive Session" debug config to tell PSES
to not change the working dir.

Remove "program" field from launch config. This has been marked
deprecated for over a year now.

Change refs in ${workspaceRoot} to ${workpaceFolder} to work
better in a multi-workspace environment.

Remove unused imports/field in DebugSession.ts.

Author: rkeithhill

Diff for: package.json

@@ -257,9 +257,9 @@
               "type": "PowerShell",
               "request": "launch",
               "name": "PowerShell Launch ${Script}",
-              "script": "^\"\\${workspaceRoot}/${Script}\"",
+              "script": "^\"\\${workspaceFolder}/${Script}\"",
               "args": [],
-              "cwd": "^\"\\${workspaceRoot}\""
+              "cwd": "^\"\\${workspaceFolder}\""
             }
           },
           {
@@ -271,7 +271,7 @@
               "name": "PowerShell Pester Tests",
               "script": "Invoke-Pester",
               "args": [],
-              "cwd": "^\"\\${workspaceRoot}\""
+              "cwd": "^\"\\${workspaceFolder}\""
             }
           },
           {
@@ -292,17 +292,13 @@
               "type": "PowerShell",
               "request": "launch",
               "name": "PowerShell Interactive Session",
-              "cwd": "^\"\\${workspaceRoot}\""
+              "cwd": ""
             }
           }
         ],
         "configurationAttributes": {
           "launch": {
             "properties": {
-              "program": {
-                "type": "string",
-                "description": "Deprecated. Please use the 'script' property instead to specify the absolute path to the PowerShell script to launch under the debugger."
-              },
               "script": {
                 "type": "string",
                 "description": "Optional: Absolute path to the PowerShell script to launch under the debugger."
@@ -317,8 +313,8 @@
               },
               "cwd": {
                 "type": "string",
-                "description": "Absolute path to the working directory. Default is the current workspace.",
-                "default": "${workspaceRoot}"
+                "description": "Absolute path to the working directory. Default is the current workspace folder.",
+                "default": "${workspaceFolder}"
               },
               "createTemporaryIntegratedConsole": {
                 "type": "boolean",
@@ -385,7 +381,7 @@
             "type": "PowerShell",
             "request": "launch",
             "name": "PowerShell Interactive Session",
-            "cwd": "${workspaceRoot}"
+            "cwd": ""
           }
         ]
       }

Diff for: src/features/DebugSession.ts

@@ -2,14 +2,12 @@
  * Copyright (C) Microsoft Corporation. All rights reserved.
  *--------------------------------------------------------*/
 
-import { hostname } from "os";
-import { dirname } from "path";
 import vscode = require("vscode");
 import { CancellationToken, DebugConfiguration, DebugConfigurationProvider,
     ExtensionContext, ProviderResult, WorkspaceFolder } from "vscode";
-import { LanguageClient, NotificationType, RequestType } from "vscode-languageclient";
+import { LanguageClient, RequestType } from "vscode-languageclient";
 import { IFeature } from "../feature";
-import { getPlatformDetails, IPlatformDetails, OperatingSystem } from "../platform";
+import { getPlatformDetails, OperatingSystem } from "../platform";
 import { PowerShellProcess} from "../process";
 import { SessionManager } from "../session";
 import Settings = require("../settings");
@@ -19,7 +17,6 @@ export class DebugSessionFeature implements IFeature, DebugConfigurationProvider
 
     private sessionCount: number = 1;
     private command: vscode.Disposable;
-    private examplesPath: string;
     private tempDebugProcess: PowerShellProcess;
 
     constructor(context: ExtensionContext, private sessionManager: SessionManager) {
@@ -75,12 +72,18 @@ export class DebugSessionFeature implements IFeature, DebugConfigurationProvider
                     ? currentDocument.uri.toString()
                     : currentDocument.fileName;
 
-            // For a folder-less workspace, vscode.workspace.rootPath will be undefined.
-            // PSES will convert that undefined to a reasonable working dir.
-            config.cwd =
-                currentDocument.isUntitled
-                    ? vscode.workspace.rootPath
-                    : currentDocument.fileName;
+            if (settings.debugging.createTemporaryIntegratedConsole) {
+                // For a folder-less workspace, vscode.workspace.rootPath will be undefined.
+                // PSES will convert that undefined to a reasonable working dir.
+                config.cwd =
+                    currentDocument.isUntitled
+                        ? vscode.workspace.rootPath
+                        : currentDocument.fileName;
+
+            } else {
+                // If the non-temp integrated console is being used, default to the current working dir.
+                config.cwd = "";
+            }
         }
 
         if (config.request === "launch") {