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if ($PSVersionTable.PSEdition -ne 'Core') {
throw "The tests are not compatible with Windows PowerShell, please use PowerShell Core instead"
}
function Remove-Escapes {
param(
[parameter(ValueFromPipeline = $true)]
[string[]]$InputObject
)
process {
$InputObject | ForEach-Object { $_ -replace '\x1b(\[(\?..|.)|.)', '' }
}
}
# Implementation-independent base class
class Distro {
[string]$id
[string]Launch() {
throw "Not implemented"
}
[string]GetPath([string]$path) {
throw "Not implemented"
}
[string]FindTarball() {
# Check if a fresh tarball exists in result, otherwise try one in the current directory
$tarball = "./result/tarball/nixos-wsl-installer.tar.gz"
if (!(Test-Path $tarball)) {
$tarball = "./nixos-wsl-installer.tar.gz"
if (!(Test-Path $tarball)) {
throw "Could not find the installer tarball! Run nix build first, or place one in the current directory."
}
}
Write-Host "Using tarball: $tarball"
return $tarball
}
[void]InstallConfig([string]$path) {
Write-Host "Installing config: $path"
# Move config out of the way
$this.Launch("/bin/sh -c 'test -f /etc/nixos/base.nix || sudo mv /etc/nixos/configuration.nix /etc/nixos/base.nix'")
$LASTEXITCODE | Should -Be 0
# Copy the new config
$this.Launch("sudo cp $($this.GetPath($path)) /etc/nixos/configuration.nix")
$LASTEXITCODE | Should -Be 0
# Rebuild
$this.Launch("sudo nixos-rebuild switch")
$LASTEXITCODE | Should -Be 0
Write-Host "Config installed successfully"
}
[void]Shutdown() {
throw "Not implemented"
}
[void]Uninstall() {
throw "Not implemented"
}
}
# Emulates a WSL distro using a Docker container (for Linux hosts)
class DockerDistro : Distro {
static [string]$hostMount = "/mnt/c"
static [string]$imageName = "local:nixos-wsl"
static [bool]$imageCreated = $false
DockerDistro() {
$tarball = $this.FindTarball()
if (!([DockerDistro]::imageCreated)) {
# Build docker image from the installer tarball
$tmpdir = $(mktemp -d)
Copy-Item $PSScriptRoot/Dockerfile $tmpdir
Copy-Item $tarball $tmpdir
docker build -t $([DockerDistro]::imageName) $tmpdir | Write-Host
Remove-Item $tmpdir -Recurse -Force
[DockerDistro]::imageCreated = $true
}
$this.id = $(New-Guid).ToString()
docker run -di --privileged --volume "/:$([DockerDistro]::hostMount)" --name $this.id $([DockerDistro]::imageName) "/bin/sh" | Out-Null
if ($LASTEXITCODE -ne 0) {
throw "Failed to launch container"
}
}
[Array]Launch([string]$command) {
Write-Host "> $command"
$result = @()
docker exec -t $this.id /nix/nixos-wsl/entrypoint -c $command | Tee-Object -Variable result | Write-Host
return $result | Remove-Escapes
}
[string]GetPath([string]$path) {
return [DockerDistro]::hostMount + $(readlink -f $path)
}
[void]Shutdown() {
docker restart $this.id # Restart instead of stop so that exec can still be used
if ($LASTEXITCODE -ne 0) {
throw "Failed to stop container"
}
}
[void]Uninstall() {
docker rm -f $this.id
if ($LASTEXITCODE -ne 0) {
throw "Failed to remove container"
}
}
}
# A real WSL distro (for Windows hosts)
class WslDistro : Distro {
[string]$tempdir
WslDistro() {
$tarball = $this.FindTarball()
$this.id = $(New-Guid).ToString()
$this.tempdir = Join-Path $([System.IO.Path]::GetTempPath()) $this.id
New-Item -ItemType Directory $this.tempdir
& wsl.exe --import $this.id $this.tempdir $tarball --version 2 | Write-Host
if ($LASTEXITCODE -ne 0) {
throw "Failed to import distro"
}
& wsl.exe --list | Should -Contain $this.id
}
[Array]Launch([string]$command) {
Write-Host "> $command"
$result = @()
& wsl.exe -d $this.id -e /nix/nixos-wsl/entrypoint -c $command | Tee-Object -Variable result | Write-Host
return $result | Remove-Escapes
}
[string]GetPath([string]$path) {
return $this.Launch("wslpath $($path -replace "\\", "/")") | Select-Object -Last 1
}
[void]Shutdown() {
& wsl.exe -t $this.id
if ($LASTEXITCODE -ne 0) {
throw "Failed to stop distro"
}
}
[void]Uninstall() {
& wsl.exe --unregister $this.id | Write-Host
if ($LASTEXITCODE -ne 0) {
throw "Failed to unregister distro"
}
Remove-Item $this.tempdir -Recurse -Force
}
}
# Auto-select the implementation to use
function Install-Distro() {
if ($IsWindows) {
Write-Host "Detected Windows host, using WSL2"
return [WslDistro]::new()
}
else {
Write-Host "Detected Linux host, using Docker"
return [DockerDistro]::new()
}
}
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