nathanverrilli/InstallConsoleFont.ps1

## InstallConsoleFont.ps1

param (
	[string]$FontName,
	[string]$FontFile,
	[switch]$Help
);

function isAdminMode() {
	return ([Security.Principal.WindowsPrincipal] `
	  [Security.Principal.WindowsIdentity]::GetCurrent() `
	).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
}

####################################
# NULL comes in a number of shapes and forms in powershell
function isNull($obj) {
	if ( ($obj -eq $null) -or
		 (($obj -is [String]) -and ($obj -eq [String]::Empty)) -or
		 ($obj -is [DBNull]) -or
		 ($obj -is [System.Management.Automation.Language.NullString]) )
	{ return $true; }
	return $false;
}
####################################
function printHelp {

	write-host " "
	write-host "  Usage: $scriptName -FontName <fontname> -FontFile <truetypefontfile>"
	write-host "         add font <fontname> in <truetypefontfile> to console fonts registry key"
	write-host "         <truetypefontfile> must be present in system fonts directory"
	write-host "         Please note that only truetype (.ttf) fonts may be installed to the powershell terminal"
	write-host "         Please note that this script must be run with elevated permissions"
	write-host " "
	write-host "  Usage: $scriptName -Help"
	write-host "         print this message"
	write-host " "
	write-host "  Example: ./$scriptName 'Zen Mono Regular' -FontFile zenmono-r-6.1.3.ttg"
	write-host " "
	exit 0;
}
####################################

#the script name might be 'InstallConsoleFont' but it might have been changed, too
$scriptName = $MyInvocation.MyCommand.Name
$adminMode = isAdminMode

if ( 	($Help) -or
		(isNull($FontName)) -or
		(isNull($FontFile)) -or
		(-not $adminMode ) )	{
	printHelp
}

$key = "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Console\TrueTypeFont"

## Find out if $FontName is installed on the system
$fontFileName = join-path $env:windir "Fonts\$FontFile"
if(!(test-path $fontFileName))
{
		write-host "File $fontFileName is not present."
		write-host "Please check that the desired font is installed in a .TTF format"
		printHelp
        break
}

## Determine if $FontName is already installed as a command window font
$installed = get-itemproperty $key |
             get-member |
             where-object { $_.Name -match "^0+$" } |
             where-object { $_.Definition -match "$FontName" }

if($installed -ne $null)
{
    write-host "The $FontName font is already installed as a command window font"
	write-host "or another font is installed with that name ( $FontName )"
	write-host " "
	break
}

## Find out what the largest string of zeros is
$zeros = (get-itemproperty $key |
         get-member |
         where-object { $_.Name -match "^0+$" } |
         measure-object).Count

## Install the font
new-itemproperty $key -Name ("0" * ($zeros + 1)) -Type string -Value "$FontName"
write-host "$FontName font installed successfully as a command window font."

	param (
	[string]$FontName,
	[string]$FontFile,
	[switch]$Help
	);

	function isAdminMode() {
	return ([Security.Principal.WindowsPrincipal] `
	[Security.Principal.WindowsIdentity]::GetCurrent() `
	).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
	}

	####################################
	# NULL comes in a number of shapes and forms in powershell
	function isNull($obj) {
	if ( ($obj -eq $null) -or
	(($obj -is [String]) -and ($obj -eq [String]::Empty)) -or
	($obj -is [DBNull]) -or
	($obj -is [System.Management.Automation.Language.NullString]) )
	{ return $true; }
	return $false;
	}
	####################################
	function printHelp {

	write-host " "
	write-host " Usage: $scriptName -FontName <fontname> -FontFile <truetypefontfile>"
	write-host " add font <fontname> in <truetypefontfile> to console fonts registry key"
	write-host " <truetypefontfile> must be present in system fonts directory"
	write-host " Please note that only truetype (.ttf) fonts may be installed to the powershell terminal"
	write-host " Please note that this script must be run with elevated permissions"
	write-host " "
	write-host " Usage: $scriptName -Help"
	write-host " print this message"
	write-host " "
	write-host " Example: ./$scriptName 'Zen Mono Regular' -FontFile zenmono-r-6.1.3.ttg"
	write-host " "
	exit 0;
	}
	####################################

	#the script name might be 'InstallConsoleFont' but it might have been changed, too
	$scriptName = $MyInvocation.MyCommand.Name
	$adminMode = isAdminMode

	if ( ($Help) -or
	(isNull($FontName)) -or
	(isNull($FontFile)) -or
	(-not $adminMode ) ) {
	printHelp
	}

	$key = "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Console\TrueTypeFont"

	## Find out if $FontName is installed on the system
	$fontFileName = join-path $env:windir "Fonts\$FontFile"
	if(!(test-path $fontFileName))
	{
	write-host "File $fontFileName is not present."
	write-host "Please check that the desired font is installed in a .TTF format"
	printHelp
	break
	}

	## Determine if $FontName is already installed as a command window font
	$installed = get-itemproperty $key \|
	get-member \|
	where-object { $_.Name -match "^0+$" } \|
	where-object { $_.Definition -match "$FontName" }

	if($installed -ne $null)
	{
	write-host "The $FontName font is already installed as a command window font"
	write-host "or another font is installed with that name ( $FontName )"
	write-host " "
	break
	}

	## Find out what the largest string of zeros is
	$zeros = (get-itemproperty $key \|
	get-member \|
	where-object { $_.Name -match "^0+$" } \|
	measure-object).Count

	## Install the font
	new-itemproperty $key -Name ("0" * ($zeros + 1)) -Type string -Value "$FontName"
	write-host "$FontName font installed successfully as a command window font."