Automatically find "PowerShell Daily" at its common path

src/features/ShowHelp.ts

@@ -18,7 +18,7 @@ export class ShowHelpFeature extends LanguageClientConsumer {
     constructor() {
         super();
         this.command = vscode.commands.registerCommand("PowerShell.ShowHelp", async (item?) => {
-            if (!item || !item.Name) {
+            if (!item?.Name) {
 
                 const editor = vscode.window.activeTextEditor;
                 if (editor === undefined) {

src/platform.ts

@@ -211,6 +211,9 @@ export class PowerShellExeFinder {
 
             break;
         }
+
+        // Look for PSCore daily
+        yield this.findPSCoreDaily();
     }
 
     /**
@@ -260,6 +263,42 @@ export class PowerShellExeFinder {
         }
     }
 
+    /**
+    * If the daily was installed via 'https://aka.ms/install-powershell.ps1', then
+    * this is the default installation location:
+    *
+    * if ($IsWinEnv) {
+    *     $Destination = "$env:LOCALAPPDATA\Microsoft\powershell"
+    * } else {
+    *     $Destination = "~/.powershell"
+    * }
+    *
+    * if ($Daily) {
+    *     $Destination = "${Destination}-daily"
+    * }
+    */
+    private findPSCoreDaily(): IPossiblePowerShellExe | undefined {
+        switch (this.platformDetails.operatingSystem) {
+        case OperatingSystem.Linux:
+        case OperatingSystem.MacOS: {
+            const exePath = path.join(os.homedir(), ".powershell-daily", "pwsh");
+            return new PossiblePowerShellExe(exePath, "PowerShell Daily");
+        }
+
+        case OperatingSystem.Windows: {
+            // We can't proceed if there's no LOCALAPPDATA path
+            if (!process.env.LOCALAPPDATA) {
+                return undefined;
+            }
+            const exePath = path.join(process.env.LOCALAPPDATA, "Microsoft", "powershell-daily", "pwsh.exe");
+            return new PossiblePowerShellExe(exePath, "PowerShell Daily");
+        }
+
+        case OperatingSystem.Unknown:
+            return undefined;
+        }
+    }
+
     private findPSCoreDotnetGlobalTool(): IPossiblePowerShellExe {
         const exeName: string = this.platformDetails.operatingSystem === OperatingSystem.Windows
             ? "pwsh.exe"

test/core/platform.test.ts

@@ -4,6 +4,7 @@
 import * as assert from "assert";
 import mockFS = require("mock-fs");
 import FileSystem = require("mock-fs/lib/filesystem");
+import * as os from "os";
 import * as path from "path";
 import rewire = require("rewire");
 import * as sinon from "sinon";
@@ -61,14 +62,13 @@ interface ITestPlatformSuccessCase extends ITestPlatform {
 // Platform configurations where we expect to find a set of PowerShells
 let successTestCases: ITestPlatformSuccessCase[];
 
-let msixAppDir: string;
-let pwshMsixPath: string;
-let pwshPreviewMsixPath: string;
 
 if (process.platform === "win32") {
-    msixAppDir = path.join(process.env.LOCALAPPDATA!, "Microsoft", "WindowsApps");
-    pwshMsixPath = path.join(msixAppDir, "Microsoft.PowerShell_8wekyb3d8bbwe", "pwsh.exe");
-    pwshPreviewMsixPath = path.join(msixAppDir, "Microsoft.PowerShellPreview_8wekyb3d8bbwe", "pwsh.exe");
+    const msixAppDir = path.join(process.env.LOCALAPPDATA!, "Microsoft", "WindowsApps");
+    const pwshMsixPath = path.join(msixAppDir, "Microsoft.PowerShell_8wekyb3d8bbwe", "pwsh.exe");
+    const pwshPreviewMsixPath = path.join(msixAppDir, "Microsoft.PowerShellPreview_8wekyb3d8bbwe", "pwsh.exe");
+    const pwshDailyDir = path.join(process.env.LOCALAPPDATA!, "Microsoft", "powershell-daily");
+    const pwshDailyPath = path.join(pwshDailyDir, "pwsh.exe");
 
     successTestCases = [
         {
@@ -124,6 +124,11 @@ if (process.platform === "win32") {
                     displayName: "Windows PowerShell (x86)",
                     supportsProperArguments: true
                 },
+                {
+                    exePath: pwshDailyPath,
+                    displayName: "PowerShell Daily",
+                    supportsProperArguments: true
+                }
             ],
             filesystem: {
                 "C:\\Program Files\\PowerShell": {
@@ -156,6 +161,9 @@ if (process.platform === "win32") {
                 "C:\\WINDOWS\\SysWOW64\\WindowsPowerShell\\v1.0": {
                     "powershell.exe": "",
                 },
+                [pwshDailyDir]: {
+                    "pwsh.exe": "",
+                }
             },
         },
         {
@@ -436,6 +444,7 @@ if (process.platform === "win32") {
         },
     ];
 } else {
+    const pwshDailyDir = path.join(os.homedir(), ".powershell-daily");
     successTestCases = [
         {
             name: "Linux (all installations)",
@@ -466,6 +475,11 @@ if (process.platform === "win32") {
                     displayName: "PowerShell Preview Snap",
                     supportsProperArguments: true
                 },
+                {
+                    exePath: path.join(pwshDailyDir, "pwsh"),
+                    displayName: "PowerShell Daily",
+                    supportsProperArguments: true
+                }
             ],
             filesystem: {
                 "/usr/bin": {
@@ -476,6 +490,9 @@ if (process.platform === "win32") {
                     "pwsh": "",
                     "pwsh-preview": "",
                 },
+                [pwshDailyDir]: {
+                    "pwsh": ""
+                }
             },
         },
         {
@@ -497,12 +514,20 @@ if (process.platform === "win32") {
                     displayName: "PowerShell Preview",
                     supportsProperArguments: true
                 },
+                {
+                    exePath: path.join(pwshDailyDir, "pwsh"),
+                    displayName: "PowerShell Daily",
+                    supportsProperArguments: true
+                }
             ],
             filesystem: {
                 "/usr/local/bin": {
                     "pwsh": "",
                     "pwsh-preview": "",
                 },
+                [pwshDailyDir]: {
+                    "pwsh": ""
+                }
             },
         },
         {