muvm: init from krun as 0.4.1

Co-authored-by: Tristan Ross <[email protected]>

Author: nrabulinski

pkgs/by-name/kr/krun/package.nix

@@ -0,0 +1,110 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  rustPlatform,
+  libkrun,
+  passt,
+  dhcpcd,
+  systemd,
+  udev,
+  pkg-config,
+  procps,
+  fex,
+  writeShellApplication,
+  coreutils,
+  makeBinaryWrapper,
+# TODO: Enable again when sommelier is not broken.
+# For now, don't give false impression of sommelier being supported.
+# sommelier,
+# withSommelier ? false,
+}:
+let
+  # TODO: Setup setuid wrappers.
+  # E.g. FEX needs fusermount for rootfs functionality
+  initScript = writeShellApplication {
+    name = "muvm-init";
+    runtimeInputs = [
+      coreutils
+    ];
+    text = ''
+      if [[ ! -f /etc/NIXOS ]]; then exit; fi
+
+      ln -s /run/muvm-host/run/current-system /run/current-system
+      # Only create the symlink if that path exists on the host and is a directory.
+      if [[ -d /run/muvm-host/run/opengl-driver ]]; then ln -s /run/muvm-host/run/opengl-driver /run/opengl-driver; fi
+    '';
+  };
+  binPath = [
+    dhcpcd
+    passt
+    (placeholder "out")
+  ] ++ lib.optionals stdenv.isAarch64 [ fex ];
+  wrapArgs = lib.escapeShellArgs [
+    "--prefix"
+    "PATH"
+    ":"
+    (lib.makeBinPath binPath)
+    "--add-flags"
+    "--execute-pre=${lib.getExe initScript}"
+  ];
+in
+rustPlatform.buildRustPackage rec {
+  pname = "muvm";
+  version = "0.4.1";
+
+  src = fetchFromGitHub {
+    owner = "AsahiLinux";
+    repo = pname;
+    rev = "muvm-${version}";
+    hash = "sha256-1XPhVEj7iqTxdWyYwNk6cbb9VRGuhpvvowYDPJb1cWU=";
+  };
+
+  useFetchCargoVendor = true;
+  cargoHash = "sha256-fkvdS0c1Ib8Kto44ou06leXy731cpMHXevyFR5RROt4=";
+
+  postPatch =
+    ''
+      substituteInPlace crates/muvm/src/guest/bin/muvm-guest.rs \
+        --replace-fail "/usr/lib/systemd/systemd-udevd" "${systemd}/lib/systemd/systemd-udevd"
+
+      substituteInPlace crates/muvm/src/monitor.rs \
+        --replace-fail "/sbin/sysctl" "${lib.getExe' procps "sysctl"}"
+    ''
+    # Only patch FEX path if we're aarch64, otherwise we don't want the derivation to pull in FEX in any way
+    + lib.optionalString stdenv.isAarch64 ''
+      substituteInPlace crates/muvm/src/guest/mount.rs \
+        --replace-fail "/usr/share/fex-emu" "${fex}/share/fex-emu"
+    '';
+
+  nativeBuildInputs = [
+    rustPlatform.bindgenHook
+    makeBinaryWrapper
+    pkg-config
+  ];
+
+  buildInputs = [
+    (libkrun.override {
+      withBlk = true;
+      withGpu = true;
+      withNet = true;
+    })
+    udev
+  ];
+
+  postFixup = ''
+    wrapProgram $out/bin/muvm ${wrapArgs}
+  '';
+
+  meta = {
+    description = "Run programs from your system in a microVM";
+    homepage = "https://github.com/AsahiLinux/muvm";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [
+      RossComputerGuy
+      nrabulinski
+    ];
+    inherit (libkrun.meta) platforms;
+    mainProgram = "muvm";
+  };
+}