Discover new PowerShell installations, fix startup issue with Windows PowerShell (#2238)

* Fix original startup issue
* Create PowerShell searcher class for reuse
* Find MSIX/Store and dotnet global tool installations
* Disable .NET global tool discovery until its ready
* Change startup order to present most relevant first
* Refactor tests to make it easier to test multiple configurations
* Offer PowerShell installation link when no PowerShell is found

Author: rjmholt

.vscode/launch.json

@@ -32,7 +32,13 @@
 			"stopOnEntry": false,
 			"sourceMaps": true,
 			"outFiles": ["${workspaceRoot}/out/test/**/*.js"],
-			"preLaunchTask": "Build"
+			"preLaunchTask": "Build",
+			"skipFiles": [
+				"${workspaceFolder}/node_modules/**/*",
+				"${workspaceFolder}/lib/**/*",
+				"/private/var/folders/**/*",
+				"<node_internals>/**/*"
+			]
 		},
 		{
 			"name": "Attach",

package-lock.json

@@ -48,14 +48,18 @@
   },
   "devDependencies": {
     "@types/mocha": "~5.2.7",
+    "@types/mock-fs": "~4.10.0",
     "@types/node": "~10.11.0",
-    "@types/node-fetch": "^2.5.2",
-    "@types/rewire": "^2.5.28",
-    "@types/semver": "^6.2.0",
+    "@types/node-fetch": "~2.5.2",
+    "@types/rewire": "~2.5.28",
+    "@types/semver": "~6.0.2",
+    "@types/sinon": "~7.5.0",
     "mocha": "~5.2.0",
     "mocha-junit-reporter": "~1.23.1",
     "mocha-multi-reporters": "~1.1.7",
+    "mock-fs": "~4.10.2",
     "rewire": "~4.0.1",
+    "sinon": "~7.5.0",
     "tslint": "~5.20.0",
     "typescript": "~3.5.3",
     "vsce": "~1.68.0",

package.json

@@ -114,6 +114,29 @@ export class Logger implements ILogger {
         });
     }
 
+    public async writeAndShowErrorWithActions(
+        message: string,
+        actions: Array<{ prompt: string; action: () => Promise<void> }>) {
+        this.writeError(message);
+
+        const fullActions = [
+            ...actions,
+            { prompt: "Show Logs", action: async () => { this.showLogPanel(); } },
+        ];
+
+        const actionKeys: string[] = fullActions.map((action) => action.prompt);
+
+        const choice = await vscode.window.showErrorMessage(message, ...actionKeys);
+        if (choice) {
+            for (const action of fullActions) {
+                if (choice === action.prompt) {
+                    await action.action();
+                    return;
+                }
+            }
+        }
+    }
+
     public startNewLog(minimumLogLevel: string = "Normal") {
         this.MinimumLogLevel = this.logLevelNameToValue(minimumLogLevel.trim());