Add optional UI to prompt for script args.

examples/.vscode/launch.json

@@ -4,15 +4,23 @@
         {
             "type": "PowerShell",
             "request": "launch",
-            "name": "PowerShell Launch (current file)",
+            "name": "PowerShell Launch Current File",
             "script": "${file}",
             "args": [],
             "cwd": "${file}"
         },
         {
             "type": "PowerShell",
             "request": "launch",
-            "name": "PowerShell Launch (DebugTest.ps1)",
+            "name": "PowerShell Launch Current File w/Args Prompt",
+            "script": "${file}",
+            "args": [ "${command:SpecifyScriptArgs}" ],
+            "cwd": "${file}"
+        },
+        {
+            "type": "PowerShell",
+            "request": "launch",
+            "name": "PowerShell Launch DebugTest.ps1",
             "script": "${workspaceRoot}/DebugTest.ps1",
             "args": ["-Count 55 -DelayMilliseconds 250"],
             "cwd": "${workspaceRoot}"

package.json

@@ -30,7 +30,8 @@
     "onCommand:PowerShell.NewProjectFromTemplate",
     "onCommand:PowerShell.OpenExamplesFolder",
     "onCommand:PowerShell.StartDebugSession",
-    "onCommand:PowerShell.PickPSHostProcess"
+    "onCommand:PowerShell.PickPSHostProcess",
+    "onCommand:PowerShell.SpecifyScriptArgs"
   ],
   "dependencies": {
     "vscode-languageclient": "1.3.1"
@@ -175,32 +176,45 @@
         "program": "./out/debugAdapter.js",
         "runtime": "node",
         "variables": {
-          "PickPSHostProcess": "PowerShell.PickPSHostProcess"
+          "PickPSHostProcess": "PowerShell.PickPSHostProcess",
+          "SpecifyScriptArgs": "PowerShell.SpecifyScriptArgs"
         },
         "languages": [
           "powershell"
         ],
         "startSessionCommand": "PowerShell.StartDebugSession",
         "configurationSnippets": [
           {
-            "label": "PowerShell: Launch (current file)",
+            "label": "PowerShell: Launch Current File",
             "description": "Launch current file (in active editor window) under debugger",
             "body": {
               "type": "PowerShell",
               "request": "launch",
-              "name": "PowerShell Launch (current file)",
+              "name": "PowerShell Launch Current File",
+              "script": "^\"\\${file}\"",
+              "args": [],
+              "cwd": "^\"\\${file}\""
+            }
+          },
+          {
+            "label": "PowerShell: Launch - Current File w/Args Prompt",
+            "description": "Launch current file (in active editor window) under debugger, prompting first for script arguments",
+            "body": {
+              "type": "PowerShell",
+              "request": "launch",
+              "name": "PowerShell Launch Current File w/Args Prompt",
               "script": "^\"\\${file}\"",
               "args": [],
               "cwd": "^\"\\${file}\""
             }
           },
           {
             "label": "PowerShell: Launch Script",
-            "description": "Launch specified script under debugger",
+            "description": "Launch specified script or path to script under debugger",
             "body": {
               "type": "PowerShell",
               "request": "launch",
-              "name": "PowerShell Launch (${Script})",
+              "name": "PowerShell Launch ${Script}",
               "script": "^\"\\${workspaceRoot}/${Script}\"",
               "args": [],
               "cwd": "^\"\\${workspaceRoot}\""
@@ -289,11 +303,19 @@
           {
             "type": "PowerShell",
             "request": "launch",
-            "name": "PowerShell Launch (current file)",
+            "name": "PowerShell Launch Current File",
             "script": "${file}",
             "args": [],
             "cwd": "${file}"
           },
+          {
+            "type": "PowerShell",
+            "request": "launch",
+            "name": "PowerShell Launch Current File w/Args Prompt",
+            "script": "${file}",
+            "args": [ "${command:SpecifyScriptArgs}" ],
+            "cwd": "${file}"
+          },
           {
             "type": "PowerShell",
             "request": "attach",

src/features/DebugSession.ts

@@ -106,6 +106,69 @@ export class DebugSessionFeature implements IFeature {
     }
 }
 
+export class SpecifyScriptArgsFeature implements IFeature {
+
+    private command: vscode.Disposable;
+    private languageClient: LanguageClient;
+    private context: vscode.ExtensionContext;
+    private emptyInputBoxBugFixed: boolean;
+
+    constructor(context: vscode.ExtensionContext) {
+        this.context = context;
+
+        let vscodeVersionArray = vscode.version.split('.');
+        let editorVersion = {
+            major: Number(vscodeVersionArray[0]),
+            minor: Number(vscodeVersionArray[1]),
+        }
+
+        this.emptyInputBoxBugFixed =
+            ((editorVersion.major > 1) ||
+            ((editorVersion.major == 1) && (editorVersion.minor > 12)));
+
+        this.command =
+            vscode.commands.registerCommand('PowerShell.SpecifyScriptArgs', () => {
+                return this.specifyScriptArguments();
+            });
+    }
+
+    public setLanguageClient(languageclient: LanguageClient) {
+        this.languageClient = languageclient;
+    }
+
+    public dispose() {
+        this.command.dispose();
+    }
+
+    private specifyScriptArguments(): Thenable<string[]> {
+        const powerShellDbgScriptArgsKey = 'powerShellDebugScriptArgs';
+
+        let options: vscode.InputBoxOptions = {
+            ignoreFocusOut: true,
+            placeHolder: "Enter script arguments or leave empty to pass no args"
+        }
+
+        if (this.emptyInputBoxBugFixed) {
+            let prevArgs = this.context.workspaceState.get(powerShellDbgScriptArgsKey, '');
+            if (prevArgs.length > 0) {
+                options.value = prevArgs;
+            }
+        }
+
+        return vscode.window.showInputBox(options).then(text => {
+            // When user cancel's the input box (by pressing Esc), the text value is undefined.
+            if (text !== undefined) {
+                if (this.emptyInputBoxBugFixed) {
+                   this.context.workspaceState.update(powerShellDbgScriptArgsKey, text);
+                }
+                return new Array(text);
+            }
+
+            return text;
+        });
+    }
+}
+
 interface ProcessItem extends vscode.QuickPickItem {
 	pid: string;	// payload for the QuickPick UI
 }

src/main.ts

@@ -21,6 +21,7 @@ import { CodeActionsFeature } from './features/CodeActions';
 import { RemoteFilesFeature } from './features/RemoteFiles';
 import { DebugSessionFeature } from './features/DebugSession';
 import { PickPSHostProcessFeature } from './features/DebugSession';
+import { SpecifyScriptArgsFeature } from './features/DebugSession';
 import { SelectPSSARulesFeature } from './features/SelectPSSARules';
 import { FindModuleFeature } from './features/PowerShellFindModule';
 import { NewFileOrProjectFeature } from './features/NewFileOrProject';
@@ -113,7 +114,8 @@ export function activate(context: vscode.ExtensionContext): void {
         new DocumentFormatterFeature(),
         new RemoteFilesFeature(),
         new DebugSessionFeature(),
-        new PickPSHostProcessFeature()
+        new PickPSHostProcessFeature(),
+        new SpecifyScriptArgsFeature(context)
     ];
 
     sessionManager =