add-fonts.ps1

# Installing cascadia code fonts (update them from https://github.com/microsoft/cascadia-code/releases)

$SourceDir = ".\supportfiles\fonts"
$Source = ".\supportfiles\fonts\*"
$Destination = (New-Object -ComObject Shell.Application).Namespace(0x14)
$TempFolder = "C:\Windows\Temp\Fonts"

# Create the source directory if it doesn't already exist
New-Item -ItemType Directory -Force -Path $SourceDir

New-Item $TempFolder -Type Directory -Force | Out-Null

Get-ChildItem -Path $Source -Include '*.ttf', '*.ttc', '*.otf' -Recurse | ForEach {
    If (-not(Test-Path "C:\Windows\Fonts\$($_.Name)")) {

        $Font = "$TempFolder\$($_.Name)"
        
        # Copy font to local temporary folder
        Copy-Item $($_.FullName) -Destination $TempFolder
        
        # Install font
        $Destination.CopyHere($Font, 0x10)

        # Delete temporary copy of font
        Remove-Item $Font -Force
    }
}