# Define cd to work more like Unix/Linux:
# * No path argument changes to the users home directory
# * Passing "-" for the path argument changes to the previous directory
$Global:cdPreviousPath = Get-Location
function cd {
  Param ([string]$Path)
  if ($Path -eq "") {
    $Path = "~"
  } elseif ($Path -eq "-") {
    $Path = $cdPreviousPath
  }
  $Global:cdPreviousPath = Get-Location
  Set-Location -Path $Path
}

# Define rm to work like Unix/Linux
# * Support -r and -f flags also -rf or -fr
# * Support specifying multiple paths to remove
function rm {
  Param (
    [Parameter(
      Mandatory=$true,
      ValueFromRemainingArguments=$true
    )][string[]]$Paths,
    [switch]$F,  [switch]$Force,
    [switch]$R,  [switch]$Recurse,
    [switch]$RF, [switch]$FR
  )
  $Command = "Remove-Item"
  if ($F -or $Force -or $RF -or $FR) {
    $Command = "$Command -Force"
  }
  if ($R -or $Recurse -or $RF -or $FR) {
    $Command = "$Command -Recurse"
  }
  foreach ($Path in $Paths) {
    Invoke-Expression -Command "$Command $Path"
  }
}