Powershell script to list or remove Visual Studio hives

ClearVisualStudioExpHive.ps1

param (
[string]$fullName = "", # Example: "12.0Exp" is VS v12.0 (2013) hive name "Exp"
[switch]$listHives = $false,
[switch]$force = $false
)

$vsAppDataRoot = Join-Path $env:APPDATA "Microsoft\VisualStudio"
$vsRegKeyRoot = "hkcu:\Software\Microsoft\VisualStudio"

if (-not $fullName -and -not $listHives) {
    Write-Warning 'Must provide a hive name with the -fullName switch. To get a list of hive names, run with -listHives switch.'
    exit
}

if ($listHives) {
    Join-Path $env:APPDATA "Microsoft\VisualStudio" | Get-ChildItem | Select-Object -Property `
        @{ Name="Full Name"; Expression={$_.Name}}, 
        @{ Name="VS Version"; Expression={
                switch($_.Name | Select-String -pattern "^[0-9]+\.[0-9]" -AllMatches | %{$_.Matches[0].Value }) {
                    "14.0"{"VS 2015"}
                    "12.0"{"VS 2013"}
                    "11.0"{"VS 2012"}
                    "10.0"{"VS 2010"}
                    "9.0"{"VS 2008"}
                    "8.0"{"VS 2005"}
                    "7.1"{"VS 2003"}
                    "7.0"{"VS 2002 (.NET)"}
                    default {"(unknown)"}
                }
            }
        },
        @{ Name="Hive Name"; Expression={
                $hiveName = $_.Name | Select-string -pattern "^[0-9]+\.[0-9]([A-Za-z0-9]+)$" -AllMatches | %{$_.Matches[0].Groups[1].Value }
                if (-not $hiveName) {
                    "(default or unknown)"
                } else {
                    $hiveName
                }
            }
        }
} else {
    if (-not $fullName) {
        Write-Error "Invalid parameters"
        exit
    }

    $regKey = Join-Path $vsRegKeyRoot $fullName
    $regConfigKey = Join-Path $vsRegKeyRoot "$($fullName)_Config"
    $folder = Join-Path $vsAppDataRoot $fullName

    if (-not ($vsAppDataRoot | Get-ChildItem | Where name -eq $fullName)) {
        Write-Warning "Folder doesn't seem to exist: $($folder)"

        if (-not $force) {
            Write-Warning "Use -force switch to attempt cleanup anyway"
            exit
        } else {
            Write-Host
        }
    }

    Write-Host "Removing registry key $($regKey)"
    if (Test-Path $regKey) {
        Remove-Item -path $regKey -Recurse -Force
        Write-Host "Done"
    } else {
        Write-Warning "path not found"
    }

    Write-Host
    Write-Host "Removing registry key $($regConfigKey)"
    if (Test-Path $regConfigKey) {
        Remove-Item -path $regConfigKey -Recurse -Force
        Write-Host "Done"
    } else {
        Write-Warning "path not found"
    }

    Write-Host
    Write-Host "Removing folder $($folder)"
    if (Test-Path $folder) {
        Remove-Item -path $folder -Recurse -Force
        Write-Host "Done"
    } else {
        Write-Warning "path not found"
    }

    Write-Host
}