A PowerShell Script/Function which takes a Posix environment (output by env, for instance) and converts it to a PowerShell environment format.

ConvertFrom-PosixEnvironment.ps1

param
(
  [Parameter(ValueFromPipeline="true")]
  [String]$PosixVars
)

Process
{
  $PosixVars `
  | ForEach-Object {
    $var = $_ `
           -replace 'export ', '' `
           -split '=' `

    ('$env:{0} = "{1}"') -f $var[0], $var[1]
  }
}