InstallWinGet PowerShell

InstallWinGet.ps1

function InstallWinGet()
{
	$hasPackageManager = Get-AppPackage -name "Microsoft.DesktopAppInstaller"

	if(!$hasPackageManager)
	{
		$releases_url = "https://api.github.com/repos/microsoft/winget-cli/releases/latest"

		[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
		$releases = Invoke-RestMethod -uri "$($releases_url)"
		$latestRelease = $releases.assets | Where { $_.browser_download_url.EndsWith("msixbundle") } | Select -First 1
	
		Add-AppxPackage -Path $latestRelease.browser_download_url
	}
}

<#
		Add-AppxPackage -Path "https://aka.ms/Microsoft.VCLibs.x64.14.00.Desktop.appx"
		
		$releases_url = "https://api.github.com/repos/microsoft/winget-cli/releases/latest"

		[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
		$releases = Invoke-RestMethod -uri "$($releases_url)"
		$latestRelease = $releases.assets | Where { $_.browser_download_url.EndsWith("appxbundle") } | Select -First 1
	
		Add-AppxPackage -Path $latestRelease.browser_download_url
#>

Why go such length?

Add-AppxPackage -Path 'https://github.com/microsoft/winget-cli/releases/latest/download/Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle'