From 98e1acc253ee7abd21d3a71ed31cb8cc0b43e764 Mon Sep 17 00:00:00 2001
From: DavHau <hsngrmpf+github@gmail.com>
Date: Wed, 28 Apr 2021 17:27:05 +0700
Subject: [PATCH] use iso image for nixos qemu test

---
 .github/workflows/nix-portable.yml |  1 -
 flake.nix                          |  5 +++--
 testing/nixos-iso.nix              | 29 +++++++++++++++++++++++++++++
 testing/nixos-qcow2.nix            | 23 -----------------------
 4 files changed, 32 insertions(+), 26 deletions(-)
 create mode 100644 testing/nixos-iso.nix
 delete mode 100644 testing/nixos-qcow2.nix

diff --git a/.github/workflows/nix-portable.yml b/.github/workflows/nix-portable.yml
index da58e36..a3e6618 100644
--- a/.github/workflows/nix-portable.yml
+++ b/.github/workflows/nix-portable.yml
@@ -58,7 +58,6 @@ jobs:
         install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
         extra_nix_config: |
           experimental-features = nix-command flakes
-          system-features = benchmark big-parallel kvm nixos-test recursive-nix
 
     - uses: cachix/cachix-action@v8
       with:
diff --git a/flake.nix b/flake.nix
index b4fd4f3..6ab82e1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,10 +40,11 @@
           excludeRuntimes = [ "bwrap" ];
         };
         nixos = {
+          # use iso image for nixos because building a qcow2 would require KVM
           img = (toString (nixosSystem {
             system = "x86_64-linux";
-            modules = [(import ./testing/nixos-qcow2.nix)];
-          }).config.system.build.qcow) + "/nixos.qcow2";
+            modules = [(import ./testing/nixos-iso.nix)];
+          }).config.system.build.isoImage) + "/iso/nixos.iso";
         };
         ubuntu = {
           url = "https://cloud-images.ubuntu.com/focal/20210415/focal-server-cloudimg-amd64.img";
diff --git a/testing/nixos-iso.nix b/testing/nixos-iso.nix
new file mode 100644
index 0000000..a66740e
--- /dev/null
+++ b/testing/nixos-iso.nix
@@ -0,0 +1,29 @@
+{ config, lib, pkgs, modulesPath, ... }:
+with builtins;
+with lib;
+{
+  imports = [
+    "${toString modulesPath}/installer/cd-dvd/iso-image.nix"
+  ];
+
+  boot.loader.timeout = mkForce 0;
+
+  fileSystems."/" = {
+    fsType = "tmpfs";
+    options = [ "mode=0755" "size=2G" ];
+  };
+
+  # EFI booting
+  isoImage.makeEfiBootable = true;
+
+  # USB booting
+  isoImage.makeUsbBootable = true;
+
+  isoImage.squashfsCompression = "zstd -Xcompression-level 5";
+
+  users.users.test.isNormalUser = true;
+  users.users.test.openssh.authorizedKeys.keys = [ (readFile ./id_ed25519.pub) ];
+  users.users.root.openssh.authorizedKeys.keys = config.users.users.test.openssh.authorizedKeys.keys;
+  services.openssh.enable = true;
+
+}
\ No newline at end of file
diff --git a/testing/nixos-qcow2.nix b/testing/nixos-qcow2.nix
deleted file mode 100644
index f4f1c4c..0000000
--- a/testing/nixos-qcow2.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{ config, lib, pkgs, modulesPath, ... }:
-with builtins;
-{
-  fileSystems."/" = {
-    device = "/dev/disk/by-label/nixos";
-    autoResize = true;
-    fsType = "ext4";
-  };
-
-  boot.loader.grub.device = lib.mkDefault "/dev/vda";
-  boot.loader.timeout = 0;
-
-  users.users.test.isNormalUser = true;
-  users.users.test.openssh.authorizedKeys.keys = [ (readFile ./id_ed25519.pub) ];
-  users.users.root.openssh.authorizedKeys.keys = config.users.users.test.openssh.authorizedKeys.keys;
-  services.openssh.enable = true;
-  
-  system.build.qcow = import "${toString modulesPath}/../lib/make-disk-image.nix" {
-    inherit lib config pkgs;
-    diskSize = 8192;
-    format = "qcow2";
-  };
-}
\ No newline at end of file