Export all WSL distribtions (minus docker images) to tarballs

export-WSL-images.ps1

<#
.SYNOPSIS
Exports WSL distributions to tar.gz files, excluding built-in docker distributions.

.PARAMETER None

.EXAMPLE
.\export-wsl-images.ps1
Exports all WSL distributions to tar.gz files.

.NOTES
Author:Tim Gran
Date: 2024-06-18
#>

# set location to script directory
$scriptPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
Set-Location -Path $scriptPath

# Install Wsl Module if not installed
if (!((Get-Module -ListAvailable | Select-Object -ExpandProperty Name) -contains 'wsl')) {
    Install-Module -Name Wsl -Force -Scope CurrentUser -AllowClobber
}

# Import Wsl Module
Import-Module -Name Wsl -Force

# Stop all WSL Distributions
Get-WslDistribution -State Running | ForEach-Object {
    Stop-WslDistribution -Distribution $_ | Out-Null
}

############################################################################################
## Stop-WslDistribution may not work if distribution is in use by another process (e.g. open shell, remote WSL in VS Code, etc.)
## Steps below will wait for 10 seconds for all distribtuions to stop. If not, script will exit.
############################################################################################

# Wait 10 seconds for all WSL Distributions to stop
1..10 | ForEach-Object {
    # Check if all stopped. If yes, break, else sleep for 1 second
    if ((Get-WslDistribution -State Running).Count -eq 0) {
        break
    } else {
        Start-Sleep -Seconds 1
    }
    # Raise Error if WSL Distributions are still running after 10 seconds
    if ($_ -eq 10) {
        Write-Host "Not all WSL Distributions are stopped. Exiting..."
        Exit
    }
}

# Stop WSL Service
Stop-Wsl

# Get WSL Distributions where 'docker' not in Name
Get-WslDistribution | Where-Object { $_.Name -notlike '*docker*' } | ForEach-Object -Parallel {
    $Distro = $_
    $OutFile = "$($Distro.Name).$(Get-Date -Format 'yyyyMMdd-HHmmss').tar.gz"

    Write-Host "Exporting $($Distro.Name) to $OutFile"
    Export-WslDistribution -Distribution $Distro -Destination $OutFile -Format Tar -Verbose
}