Code/Set-Environment.ps1

#requires -version 5.0
###############################################################################
# WintellectPowerShell Module
# Copyright (c) 2010-2017 - John Robbins/Wintellect
#
# Do whatever you want with this module, but please do give credit.
###############################################################################

# Always make sure all variables are defined and all best practices are
# followed.
Set-StrictMode -version Latest

function Set-Environment
{
<#
.SYNOPSIS
Brings the CMD SET command back to PowerShell.
 
.DESCRIPTION
PowerShell has a powerfull way to set environment variables, but many of us
have the DOS SET command burned into our fingers. This function keeps us
productive. :)
 
Full credit to Wes Haggard at http://weblogs.asp.net/whaggard for this gem.
 
To replace the default set alias with the one provided by WintellectPowerShell,
execute the following command before importing the this module.
 
Remove-Item alias:set -Force -ErrorAction SilentlyContinue
 
 
.PARAMETER Var
The environment variable in SET format, "var=value". If you want to clear an
environment variable, use "var=". If no parameter is specified, this will dump
all environment variables currently defined.
 
.LINK
http://weblogs.asp.net/whaggard/archive/2007/02/08/powershell-version-of-cmd-set.aspx
https://github.com/Wintellect/WintellectPowerShell
 
#>

    [CmdletBinding(SupportsShouldProcess=$true)]
    param
    (
        [string]$var
    )

    if ($var -eq "")
    {
        get-childitem -Path env: | sort-object -Property name
    }
    else
    {
        if ($var -match "^(\S*?)\s*=\s*(.*)$")
        {
            if ($PSCmdlet.ShouldProcess($matches[1], "Setting environment variable"))
            {
                set-item -force -path "env:$($matches[1])" -value $matches[2];        
            }
        }
        else
        {
            write-error -Message "ERROR Usage: VAR=VALUE"
        }
    }    
}

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