test(login-shell): fix home-manager URL

Author: nzbr

tests/lib/lib.ps1

@@ -15,7 +15,6 @@ function Remove-Escapes {
   }
 }
 
-# Implementation-independent base class
 class Distro {
   [string]$id
   [string]$tempdir

tests/login-shell/login-shell.Tests.ps1

@@ -14,13 +14,16 @@ Describe "Login Shell" {
     $output | Select-Object -Index ($output.Length - 2) | Should -Match "login_shell\s*on"
   }
 
-  It "should be possible to access home manager sessionVariables" {
+  It "should be possible to install a configuration that uses home-manager session variables" {
     $distro.InstallConfig("$PSScriptRoot/session-variables.nix", "switch")
+  }
 
-    # Session variable file should exist
+  It "should have created the hm-session-vars.sh file" {
     $distro.Launch("test -f ~/.nix-profile/etc/profile.d/hm-session-vars.sh")
     $LASTEXITCODE | Should -Be 0
+  }
 
+  It "should be possible to access home manager sessionVariables in bash" {
     Write-Host "> echo `$TEST_VARIABLE"
     Write-Output "echo `$TEST_VARIABLE" | wsl -d $distro.id | Tee-Object -Variable output | Write-Host
     $output | Select-Object -Last 1 | Should -BeExactly "THISISATESTSTRING"

tests/login-shell/session-variables.nix

@@ -1,11 +1,21 @@
 { pkgs, lib, ... }:
 let
   ver = with lib; substring 0 5 version;
+  hmBranch =
+    let
+      # Use the nix parser conveniently built into nix
+      flake = import <nixos-wsl/flake.nix>;
+      url = flake.inputs.nixpkgs.url;
+      version = lib.removePrefix "github:NixOS/nixpkgs/nixos-" url;
+    in
+    if version == "unstable"
+    then "master"
+    else "release-" + version;
 in
 {
   imports = [
     <nixos-wsl/modules>
-    "${builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/release-${ver}.tar.gz"}/nixos"
+    "${builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/${hmBranch}.tar.gz"}/nixos"
   ];
 
   wsl.enable = true;