Activate conda environment in PowerShell

cactivate.ps1

Param
  (
     [parameter(Position=0, Mandatory=$true)]
     [String]
     $env_name
  )

# simulate activation of Conda environment
$cenv = "C:\Path\to\anaconda\installation\envs\$env_name"
$Env:CONDA_PREFIX = $cenv
$Env:CONDA_DEFAULT_ENV = $env_name
$Env:PATH = "$cenv;$cenv\Library\mingw-w64\bin;$cenv\Library\usr\bin;$cenv\Library\bin;$cenv\Scripts;$cenv\bin;$Env:PATH"

# add env name to prompt
function global:UserPrompt {''}
$Function:UserPrompt = $Function:prompt
function global:prompt
{
    "($Env:CONDA_DEFAULT_ENV) " + (UserPrompt)
}