public/Export-Up.ps1
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<#
.SYNOPSIS Export each ancestor of the current or given directory (to a global variable by default). .PARAMETER From The folder from which to start. $PWD by default. .PARAMETER Force Overwrites any existing globals variables of the same names with the new values. .PARAMETER NoGlobals Don't copy output into global variables. .PARAMETER IncludeRoot Includes the root level path in the output. .EXAMPLE C:\projects\powershell\src\Microsoft.PowerShell.SDK > Export-Up Name Value ---- ----- Microsoft.PowerShell.SDK C:\projects\powershell\src\Microsoft.PowerShell.SDK\ src C:\projects\powershell\src\ powershell C:\projects\powershell\ projects C:\projects\ C:\projects\powershell\src\Microsoft.PowerShell.SDK> $powershell C:\projects\powershell\ C:\projects\powershell\src\Microsoft.PowerShell.SDK> _ #> function Export-Up() { [CmdletBinding()] param( [string] $From = $PWD, [switch] $Force, [switch] $NoGlobals, [switch] $IncludeRoot ) $start = Resolve-Path $From -ErrorAction Ignore if (!$start -or !($next = $start.Path)) {return} $getPair = { @{name = (Split-Path $next -Leaf); path = "$next" } } $output = [ordered]@{ (&$getPair).name = (&$getPair).path } try { while ( ($next = $next | Split-Path -Parent) -and ($next -ne $start.Drive.Root)) { $pair = &$getPair # in the case of duplicate names, first one wins if (!$output.Contains($pair.name)) { $output.Add($pair.name, $pair.path) } } # on Unix there's a weird empty path returned for the root directory # so we add it explicitly here instead of inside the loop if ( $IncludeRoot -and $output.Values -notcontains $start.Drive.Root ) { $output.Add($start.Drive.Name, $start.Drive.Root) } } catch [Management.Automation.PSArgumentException] { WriteLog "$_" $Global:Error.RemoveAt(0) } if (-not $NoGlobals) { $output.GetEnumerator() | % { New-Variable $_.Name $_.Value -Scope Global -Force:$Force -ErrorAction Ignore } } $output } |