Powershell utility functions in $profile to easily colorize things in Calculated Properties (for Select-Object, Format-Table, etc.)

Microsoft.PowerShell_profile.ps1

# aux
# ---------------------
enum CC { RESET = 0; RED = 31; GREEN; YELLOW; BLUE; MAGENTA; CYAN; GRAY }
function CCs() { [enum]::GetValues([CC]) | select -skip 1 | % { [pscustomobject]@{ Code = +$_; Name = (f $_ "$_") } } }

function Get-ColoredString($color, [string] $text) {
	if ($Host.UI.SupportsVirtualTerminal) {
		[char] $ESC = 27
		[int] $code = $color -as [CC]
		"$ESC[${code}m" + $text + "$ESC[0m"
	} else {
		$text
	}
}
Set-Alias f Get-ColoredString

function Get-CalculatedProperty() {
	param(
		[object] $propname,
		[string] $as = ($propname -creplace '(?<=[a-z])(?=[A-Z])', ' '),
		[string] $format = "", [CC] $color = 0,
		[switch] $left, [switch] $centered, [switch] $right
	)
	
	# Bail out if nothing is passed
	if ($propname -eq $null) {
		return @{}
	}
	
	# If the string passed to our "-As" flag ("$as" parameter) is convertible
	# to a color code (our "[CC]" enum), use it in place of $color
	if ($as -as [CC]) {
		$color = $as
		$as = $propname
	}
	
	# If -Format/$format is convertible to [CC], use it in place of $color
	if ($format -as [CC]) {
		$color = $format
		$format = ""
	}
	
	# $true if no code generation for a [scriptblock] is needed
	[bool] $passPropnameAsIs = `
		$propname -is [scriptblock] -or `
		$propname -is [string] -and $color -eq 0
	
    $calcProp = @{
        Name = $as
        Expression = $(
			if ($passPropnameAsIs) {
				$propname
			} else {
				[string] $script = $(
					if ($propname -is [string]) {
						'$_.' + $propname
					} else {
						'(' + $propname.ToString().Trim() + ')'
					}
				)
				if (-not [string]::IsNullOrEmpty($format)) {
					$script = "'{0:$format}' -f ($script)"
				}
				if ($color -ne 0) {
					$script = "Get-ColoredString $color ($script)"
				}
				[scriptblock]::Create($script)
			}
		)
    }
    
	if ($passPropnameAsIs -and -not [string]::IsNullOrEmpty($format)) {
		$calcProp['f'] = $format
	}
	
    if ($left)     { $calcProp['a'] = 'l' }
    if ($centered) { $calcProp['a'] = 'c' }
    if ($right)    { $calcProp['a'] = 'r' }
    
    $calcProp
}
Set-Alias gcp Get-CalculatedProperty