chore(pwsh): install.ps1 compatibility features

website/static/install.ps1

@@ -26,22 +26,24 @@ https://ohmyposh.dev/docs/installation/linux
 "@
     exit
 }
+
 $installer = ''
-$arch = (Get-CimInstance -Class Win32_Processor -Property Architecture).Architecture
+$arch = (Get-CimInstance -Class Win32_Processor -Property Architecture).Architecture | Select-Object -First 1
 switch ($arch) {
     0 { $installer = "install-386.exe" } # x86
     5 { $installer = "install-arm64.exe" } # ARM
     9 {
         if ([Environment]::Is64BitOperatingSystem) {
             $installer = "install-amd64.exe"
-        } else {
+        }
+        else {
             $installer = "install-386.exe"
         }
     }
     12 { $installer = "install-arm64.exe" } # Surface Pro X
 }
 
-if ($installer -eq '') {
+if ([string]::IsNullOrEmpty($installer)) {
     Write-Host @"
 The installer for system architecture ($arch) is not available.
 "@
@@ -49,8 +51,26 @@ The installer for system architecture ($arch) is not available.
 }
 
 Write-Host "Downloading $installer..."
-$tmp = New-TemporaryFile | Rename-Item -NewName { $_ -replace 'tmp$', 'exe' } -PassThru
+
+# validate the availability of New-TemporaryFile
+if (Get-Command -Name New-TemporaryFile -ErrorAction SilentlyContinue) {
+    $tmp = New-TemporaryFile | Rename-Item -NewName { $_ -replace 'tmp$', 'exe' } -PassThru
+}
+else {
+    $tmp = New-Item -Path $env:TEMP -Name ([System.IO.Path]::GetRandomFileName() -replace '\.\w+$', '.exe') -Force -ItemType File
+}
 $url = "https://github.com/JanDeDobbeleer/oh-my-posh/releases/latest/download/$installer"
+
+# check if we can make https requests and download the binary
+try {
+    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+    Invoke-WebRequest -Uri $url -Method Head | Where-Object -FilterScript { $_.StatusCode -ne 200 }  # Suppress success output
+}
+catch {
+    Write-Host "Unable to download $installer. Please check your internet connection."
+    exit
+}
+
 Invoke-WebRequest -OutFile $tmp $url
 Write-Host 'Running installer...'
 $installMode = "/CURRENTUSER"