Fix Windows installer entrypoint execution

.github/workflows/release.yml

@@ -479,20 +479,26 @@ jobs:
           SPOTUIFY_VERSION: ${{ needs.validate.outputs.version }}
         run: |
           $env:SPOTUIFY_INSTALL_DIR = Join-Path $env:RUNNER_TEMP 'spotuify'
-          $installerSource = $null
+          $installCommand = @'
+          Invoke-RestMethod -Uri 'https://crapshack.net/spotuify/install.ps1' -UseBasicParsing -TimeoutSec 60 | Invoke-Expression
+          '@
+          $installed = $false
           for ($attempt = 1; $attempt -le 5; $attempt++) {
-            try {
-              $installerSource = Invoke-RestMethod `
-                -Uri 'https://crapshack.net/spotuify/install.ps1' `
-                -UseBasicParsing `
-                -TimeoutSec 60
+            & powershell.exe `
+              -NoLogo `
+              -NoProfile `
+              -NonInteractive `
+              -ExecutionPolicy Bypass `
+              -Command $installCommand
+            if ($LASTEXITCODE -eq 0) {
+              $installed = $true
               break
-            } catch {
-              if ($attempt -eq 5) { throw }
-              Start-Sleep -Seconds (2 * $attempt)
             }
+            if ($attempt -lt 5) { Start-Sleep -Seconds (2 * $attempt) }
+          }
+          if (-not $installed) {
+            throw 'Spotuify public installer failed after 5 attempts.'
           }
-          $installerSource | Invoke-Expression
           $binDirectory = Join-Path $env:SPOTUIFY_INSTALL_DIR 'bin'
           $mainVersion = & (Join-Path $binDirectory 'spotuify.exe') --version
           $currentRelease = (Get-Content -LiteralPath (Join-Path $env:SPOTUIFY_INSTALL_DIR 'current') -Raw).Trim()

packaging/standalone/install.ps1

@@ -1,5 +1,9 @@
 #Requires -Version 5.1
 
+param(
+	[switch]$LoadOnly
+)
+
 Set-StrictMode -Version Latest
 $ErrorActionPreference = 'Stop'
 $ProgressPreference = 'SilentlyContinue'
@@ -831,7 +835,7 @@ function Install-Spotuify {
 	}
 }
 
-if ($MyInvocation.InvocationName -ne '.') {
+if (-not $LoadOnly) {
 	try {
 		Install-Spotuify
 	} catch {

test/installer-windows.tests.ps1

@@ -6,7 +6,7 @@ $ProgressPreference = 'SilentlyContinue'
 
 $repositoryRoot = Split-Path -Parent $PSScriptRoot
 $installerPath = Join-Path $repositoryRoot 'packaging/standalone/install.ps1'
-. $installerPath
+. $installerPath -LoadOnly
 
 $testRoot = Join-Path ([IO.Path]::GetTempPath()) ("spotuify-installer-tests-$([guid]::NewGuid().ToString('N'))")
 $script:FixtureManifest = $null
@@ -572,6 +572,21 @@ try {
 		}
 	}
 
+	Invoke-Test 'runs the entrypoint when evaluated from a dot-sourced scope' {
+		$installerSource = Get-Content -LiteralPath $installerPath -Raw
+		$previousVersion = $env:SPOTUIFY_VERSION
+		try {
+			$env:SPOTUIFY_VERSION = 'invalid'
+			Assert-Throws {
+				. {
+					$installerSource | Invoke-Expression
+				}
+			} 'SPOTUIFY_VERSION must be latest or a stable version'
+		} finally {
+			[Environment]::SetEnvironmentVariable('SPOTUIFY_VERSION', $previousVersion, 'Process')
+		}
+	}
+
 	Write-Host 'All Spotuify Windows installer tests passed.'
 } catch {
 	$testFailure = $_

test/release-workflow.test.ts

@@ -29,6 +29,13 @@ describe("release workflow", () => {
 
   test("publishes standalone installers and verifies the crapshack endpoints", async () => {
     const source = await Bun.file(WORKFLOW_PATH).text();
+    const workflow = Bun.YAML.parse(source) as {
+      jobs?: {
+        "public-installer-smoke"?: {
+          steps?: Array<{ if?: string; run?: string }>;
+        };
+      };
+    };
 
     expect(source).toContain(
       "install -m 0755 packaging/standalone/install.sh dist/install.sh",
@@ -41,5 +48,17 @@ describe("release workflow", () => {
     );
     expect(source).toContain("https://crapshack.net/spotuify/install.sh");
     expect(source).toContain("https://crapshack.net/spotuify/install.ps1");
+
+    const windowsSmoke = workflow.jobs?.["public-installer-smoke"]?.steps?.find(
+      (step) => step.if === "matrix.kind == 'windows'",
+    );
+    expect(windowsSmoke?.run).toContain("& powershell.exe");
+    expect(windowsSmoke?.run).toContain("-Command $installCommand");
+    expect(windowsSmoke?.run).toContain(
+      "Invoke-RestMethod -Uri 'https://crapshack.net/spotuify/install.ps1' -UseBasicParsing -TimeoutSec 60 | Invoke-Expression",
+    );
+    expect(windowsSmoke?.run).not.toContain(
+      "$installerSource | Invoke-Expression",
+    );
   });
 });