src/Remove-EnvVarPathItem.ps1
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#!/usr/bin/env pwsh $ErrorActionPreference = "Stop" Set-StrictMode -Version Latest <# .SYNOPSIS Removes the specified path entry from the specified PATH-style environment variable at the given environment variable scope. .PARAMETER Process Removes the specified path entry from the environment variable at the Process-level environment variable scope. .PARAMETER User Removes the specified path entry from the environment variable at the User-level environment variable scope. If running on Windows and the current session is not elevated, causes an exception to be thrown. .PARAMETER Machine Removes the specified path entry from the environment variable at the Machine-level environment variable scope. If running on Windows and the current session is not elevated, causes an exception to be thrown. .PARAMETER Scope The scope of the environment variable from which the path entry will be removed. If running on Windows and the current session is not elevated, values other than 'Process' cause an exception to be thrown. .PARAMETER Name The name of the environment variable from which the path entry will be removed. .PARAMETER Value The exact path entry to remove from the environment variable. .PARAMETER ValueLike The path entry to remove from the environment variable, using a wildcard pattern match. .PARAMETER ValueMatch The path entry to remove from the environment variable, using a regular expression match. .EXAMPLE Remove-EnvVarPathItem -Process -Name "PATH" -ValueLike "C:\Program Files\*" .COMPONENT env #> function Remove-EnvVarPathItem() { [CmdletBinding(DefaultParameterSetName = "ProcessScopeForValue")] param( [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValue", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValueLike", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValueMatch", Position=0)] [switch] $Machine, [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValue", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValueLike", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValueMatch", Position=0)] [switch] $Process, [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValue", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValueLike", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValueMatch", Position=0)] [switch] $User, [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValue", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValueLike", Position=0)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValueMatch", Position=0)] [System.EnvironmentVariableTarget] $Scope, [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValue", Position=1)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValue", Position=1)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValue", Position=1)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValue", Position=1)] [ValidateLength(1, [int]::MaxValue)] [string] $Name, [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValue", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValue", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValue", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValue", Position=2, ValueFromPipeline=$true)] [string] $Value, [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValueLike", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValueLike", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValueLike", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValueLike", Position=2, ValueFromPipeline=$true)] [string] $ValueLike, [Parameter(Mandatory=$true, ParameterSetName="MachineScopeForValueMatch", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ProcessScopeForValueMatch", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="UserScopeForValueMatch", Position=2, ValueFromPipeline=$true)] [Parameter(Mandatory=$true, ParameterSetName="ScopeValueForValueMatch", Position=2, ValueFromPipeline=$true)] [string] $ValueMatch ) Begin { if ($Machine -and $Machine.IsPresent) { $Scope = [System.EnvironmentVariableTarget]::Machine } elseif ($Process -and $Process.IsPresent) { $Scope = [System.EnvironmentVariableTarget]::Process } elseif ($User -and $User.IsPresent) { $Scope = [System.EnvironmentVariableTarget]::User } if (-not [System.EnvironmentVariableTarget]::IsDefined($Scope)) { throw "Unrecognized EnvironmentVariableTarget '$Scope'" } if ($IsWindows -and ($Scope -ne [System.EnvironmentVariableTarget]::Process)) { [bool] $isElevated = Test-Elevation if (-not $isElevated) { throw "Elevated session required for EnvironmentVariableTarget '$Scope'" } } } Process { [string] $extantPath = Get-EnvVar -Scope $Scope -Name $Name -Value [string[]] $pathItems = $extantPath -split [System.IO.Path]::PathSeparator if ($Value) { $pathItems = $pathItems | Where-Object { $_ -ne $Value } } elseif ($ValueLike) { $pathItems = $pathItems | Where-Object { $_ -notlike $ValueLike } } elseif ($ValueMatch) { $pathItems = $pathItems | Where-Object { $_ -notmatch $ValueMatch } } [string] $newPathValue = $pathItems -join [System.IO.Path]::PathSeparator Set-EnvVar -Scope $Scope -Name $Name -Value $newPathValue } } |