[PATCH v3 6/6] vm/app: add hello-wayland demo VM

[Alyssa Ross <hi@alyssa.is>]

From: Alyssa Ross <alyssa.ross@unikie.com>

hello-wayland is the simplest possible Wayland client.  This VM is
used to demonstrate Spectrum's new Wayland capabilities.

Signed-off-by: Alyssa Ross <alyssa.ross@unikie.com>
Signed-off-by: Alyssa Ross <hi@alyssa.is>
---
 host/initramfs/extfs.nix |  4 +++-
 vm/app/hello-wayland.nix | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 vm/app/hello-wayland.nix

diff --git a/host/initramfs/extfs.nix b/host/initramfs/extfs.nix
index 6f32bca..174fc81 100644
--- a/host/initramfs/extfs.nix
+++ b/host/initramfs/extfs.nix
@@ -10,6 +10,7 @@ let
   };
 
   appvm-catgirl = import ../../vm/app/catgirl.nix { inherit config; };
+  appvm-hello-wayland = import ../../vm/app/hello-wayland.nix { inherit config; };
   appvm-lynx = import ../../vm/app/lynx.nix { inherit config; };
   appvm-mg = import ../../vm/app/mg.nix { inherit config; };
 in
@@ -17,13 +18,14 @@ in
 runCommand "ext.ext4" {
   nativeBuildInputs = [ e2fsprogs ];
 } ''
-  mkdir -p root/svc/data/appvm-{catgirl,lynx,mg}
+  mkdir -p root/svc/data/appvm-{catgirl,hello-wayland,lynx,mg}
   cd root
 
   tar -C ${netvm} -c data | tar -C svc -x
   chmod +w svc/data
 
   tar -C ${appvm-catgirl} -c . | tar -C svc/data/appvm-catgirl -x
+  tar -C ${appvm-hello-wayland} -c . | tar -C svc/data/appvm-hello-wayland -x
   tar -C ${appvm-lynx} -c . | tar -C svc/data/appvm-lynx -x
   tar -C ${appvm-mg} -c . | tar -C svc/data/appvm-mg -x
 
diff --git a/vm/app/hello-wayland.nix b/vm/app/hello-wayland.nix
new file mode 100644
index 0000000..e10f05e
--- /dev/null
+++ b/vm/app/hello-wayland.nix
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2022 Unikie
+# SPDX-FileCopyrightText: 2023 Alyssa Ross <hi@alyssa.is>
+
+import ../../lib/eval-config.nix ({ config, ... }:
+
+import ../make-vm.nix { inherit config; } {
+  wayland = true;
+  run = config.pkgs.pkgsStatic.callPackage (
+    { writeScript, hello-wayland }:
+    writeScript "run-hello-wayland" ''
+      #!/bin/execlineb -P
+      foreground { ln -ns /run/ext /run/opengl-driver }
+      foreground { mkdir /run/user }
+      foreground {
+        umask 077
+        mkdir /run/user/0
+      }
+      if { /etc/mdev/wait card0 }
+      export XDG_RUNTIME_DIR /run/user/0
+
+      # No pkgsStatic.wayland-proxy-virtwl:
+      # https://github.com/nix-ocaml/nix-overlays/issues/698
+      ${config.pkgs.pkgsMusl.wayland-proxy-virtwl}/bin/wayland-proxy-virtwl --virtio-gpu
+
+      ${hello-wayland}/bin/hello-wayland
+    ''
+  ) { };
+})
-- 
2.40.1