Disk Free imitation in PowerShell

df.ps1

## Profile location
# https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_profiles
# CurrentUserCurrentHost profile always runs last:
# $HOME\Documents\PowerShell\Microsoft.PowerShell_profile.ps1
# It is the profile typically meant as your PowerShell profile.

## Disk Free imitation in PowerShell:
# df           # all filesystems
# df C:        # drive letters can be written with or without colon (:)
# df D,E       # can be separated by using commas or
# df C D E     # spaces, but never both
# df C:\Users  # providing paths is also supported
# df .         # including dot for current working directory
function df {
	[CmdletBinding()]
	param(
		[Parameter(Mandatory=$false, Position=0, ValueFromRemainingArguments=$true)]
		[string[]] $Name
	)
	if (-not $PSBoundParameters.ContainsKey('Name')) {
		Get-Volume
	} else {
		$volumes = $Name | ForEach-Object {
			if ($_ -match '^[A-Za-z]:?$') {
				Get-Volume -DriveLetter $_.TrimEnd(':')
			} else {
				Get-Volume -FilePath (Resolve-Path $_)
			}
		}
		$volumes
	}
}