PowerShell function to install fonts on Windows. Supports both individual and bulk file installations. Offers wildcard and recursive directory searching. TTF and OTF fonts supported by default.

Install-Font.ps1

Function Install-Font {
    <#
    .SYNOPSIS
    Installs fonts from a specified path on Windows systems.

    .DESCRIPTION
    The Install-Font function supports handling individual font files, directories containing multiple fonts, and wildcard paths. It also supports recursive search for font files in the specified path and all its subdirectories. The function is capable of installing both TTF and OTF font types.

    .PARAMETER Path
    Specifies the path to the font file(s). This can be a path to an individual font file, a directory containing font files, or a wildcard path. The function accepts both relative and absolute paths.

    .PARAMETER Recursive
    When specified, the function will recursively search for font files in the specified path and all its subdirectories. This is useful for bulk installations from directories with nested subfolders.

    .EXAMPLE
    Install-Font -Path ".\MyFont.ttf"
    This example installs a single font file named 'MyFont.ttf' located in the current directory.

    .EXAMPLE
    Install-Font -Path ".\MyFont.otf"
    This example installs a single font file named 'MyFont.otf' located in the current directory.

    .EXAMPLE
    Install-Font -Path "C:\Users\User\Downloads\*.ttf"
    This example installs all TTF fonts located in the 'Downloads' folder of the 'User' directory.

    .EXAMPLE
    Install-Font -Path "*.ttf" -Recursive
    This example installs all TTF fonts found in the current directory and its subdirectories.
    #>
    param (
        [string]$Path,
        [switch]$Recursive
    )
    # Get the path to the Fonts folder
    $SystemFontsPath = [System.Environment]::GetFolderPath([System.Environment+SpecialFolder]::Fonts)

    # Find all font files based on the given path
    $fontFiles = Get-ChildItem -Path $Path -Recurse:$Recursive -File | Where-Object { $_.Extension -eq '.ttf' -or $_.Extension -eq '.otf' }

    foreach ($file in $fontFiles) {
        Write-Output "Installing $($file.Name)"

        # Construct the path to the font file in the Fonts folder
        $FontDestination = Join-Path -Path $SystemFontsPath -ChildPath $file.Name

        # Get font name from font file
        $ShellFolder = (New-Object -COMObject Shell.Application).Namespace($file.DirectoryName)
        $ShellFile = $ShellFolder.ParseName($file.Name)
        $FontType = $ShellFolder.GetDetailsOf($ShellFile, 2)
        $FontName = $ShellFolder.GetDetailsOf($ShellFile, 21)

        # Check if the file is a font file
        If (-not ($FontType -Like '*font*')) {
            Write-Output "  $($file.Name) is not a recognized font file"
            Continue
        }

        # If the font file doesn't exist in the Fonts folder
        if (-not (Test-Path -Path $FontDestination)) {
            # Copy the font file to the Fonts folder
            Copy-Item -Path $file.FullName -Destination $FontDestination

            # Register the font in the registry for persistence
            $registryPath = "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts"
            if ($null -ne $FontName) {
                $null = Set-ItemProperty -Path $registryPath -Name "$FontName (TrueType)" -Value $file.Name
            }
            Write-Output "  Installed `"$FontName``"
        } else {
            Write-Output "  `"$FontName`" is already installed"
        }
    }
}