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name: host/rootfs/default.nix 	 # note: path name is non-authoritative(*)

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# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2021-2025 Alyssa Ross <hi@alyssa.is>
# SPDX-FileCopyrightText: 2022 Unikie

import ../../lib/call-package.nix (
{ callSpectrumPackage, spectrum-build-tools, src
, pkgsMusl, inkscape, linux_latest, xorg
}:
pkgsMusl.callPackage (

{ spectrum-host-tools, spectrum-router
, lib, stdenvNoCC, nixos, runCommand, writeClosure, erofs-utils, s6-rc
, busybox, cloud-hypervisor, cosmic-files, crosvm, cryptsetup
, dejavu_fonts, dbus, execline, foot, fuse3, iproute2, inotify-tools
, jq, kmod, mdevd, mesa, s6, s6-linux-init, socat, systemd
, util-linuxMinimal, virtiofsd, westonLite, xdg-desktop-portal
, xdg-desktop-portal-gtk, xdg-desktop-portal-spectrum-host
}:

let
  inherit (nixosAllHardware.config.hardware) firmware;
  inherit (lib)
    concatMapStringsSep concatStrings escapeShellArgs fileset mapAttrsToList
    trivial;

  packages = [
    cloud-hypervisor cosmic-files crosvm cryptsetup dbus execline
    fuse3 inotify-tools iproute2 jq kmod mdevd s6 s6-linux-init s6-rc
    socat spectrum-host-tools systemd util-linuxMinimal virtiofsd
    xdg-desktop-portal-spectrum-host spectrum-router

    (foot.override { allowPgo = false; })

    (busybox.override {
      # Use a separate file as it is a bit too big.
      extraConfig = builtins.readFile ./busybox-config;
    })
  ];

  nixosAllHardware = nixos ({ modulesPath, ... }: {
    imports = [ (modulesPath + "/profiles/all-hardware.nix") ];

    system.stateVersion = trivial.release;
  });

  kernel = linux_latest;

  appvm = callSpectrumPackage ../../img/app { inherit (foot) terminfo; };
  netvm = callSpectrumPackage ../../vm/sys/net { inherit (foot) terminfo; };

  # Packages that should be fully linked into /usr,
  # (not just their bin/* files).
  #
  # kmod.lib is dlopen()ed by systemd-udevd via libsystemd-shared.so.
  # It doesn't get picked up from libsystemd-shared.so's RUNPATH due to
  # https://inbox.vuxu.org/musl/20251017-dlopen-use-rpath-of-caller-dso-v1-1-46c69eda1473@iscas.ac.cn/
  usrPackages = [
    appvm dejavu_fonts kmod.lib mesa westonLite kernel.modules
    firmware netvm
  ];

  appvms = {
    appvm-firefox = callSpectrumPackage ../../vm/app/firefox.nix {};
    appvm-foot = callSpectrumPackage ../../vm/app/foot.nix {};
    appvm-gnome-text-editor = callSpectrumPackage ../../vm/app/gnome-text-editor.nix {};
  };

  packagesSysroot = runCommand "packages-sysroot" {
    depsBuildBuild = [ inkscape ];
    nativeBuildInputs = [ xorg.lndir ];
  } ''
    mkdir -p $out/usr/bin $out/usr/share/dbus-1/services \
      $out/usr/share/icons/hicolor/20x20/apps

    # lndir silently ignores existing links, so run it before ln
    # so that ln catches any duplicates.
    for pkg in ${escapeShellArgs usrPackages}; do
        lndir -ignorelinks -silent "$pkg" "$out/usr"
    done

    # Weston doesn't support SVG icons.
    inkscape -w 20 -h 20 \
        -o $out/usr/share/icons/hicolor/20x20/apps/com.system76.CosmicFiles.png \
        ${cosmic-files}/share/icons/hicolor/24x24/apps/com.system76.CosmicFiles.svg

    ln -st $out/usr/bin \
        ${concatMapStringsSep " " (p: "${p}/bin/*") packages} \
        ${xdg-desktop-portal}/libexec/xdg-document-portal \
        ${xdg-desktop-portal-gtk}/libexec/xdg-desktop-portal-gtk
    ln -st $out/usr/share/dbus-1 \
        ${dbus}/share/dbus-1/session.conf
    ln -st $out/usr/share/dbus-1/services \
        ${xdg-desktop-portal-gtk}/share/dbus-1/services/org.freedesktop.impl.portal.desktop.gtk.service

    ${concatStrings (mapAttrsToList (name: path: ''
      ln -s ${path} $out/usr/lib/spectrum/vm/${name}
    '') appvms)}
  '';
in

stdenvNoCC.mkDerivation {
  name = "spectrum-rootfs";

  src = fileset.toSource {
    root = ../..;
    fileset = fileset.intersection src (fileset.unions [
      ./.
      ../../lib/common.mk
      ../../scripts/make-erofs.sh
    ]);
  };
  sourceRoot = "source/host/rootfs";

  nativeBuildInputs = [ cryptsetup erofs-utils spectrum-build-tools s6-rc ];

  env = {
    PACKAGES = runCommand "packages" {} ''
      printf "%s\n/\n" ${packagesSysroot} >$out
      sed p ${writeClosure [ packagesSysroot] } >>$out
    '';
  };

  # The Makefile uses $(ROOT_FS), not $(dest), so it can share code
  # with other Makefiles that also use this variable.
  makeFlags = [ "ROOT_FS=$(out)" ];

  dontInstall = true;

  enableParallelBuilding = true;

  __structuredAttrs = true;
  unsafeDiscardReferences = { out = true; };
  dontFixup = true;

  passthru = {
    inherit appvm firmware kernel nixosAllHardware packagesSysroot;
  };

  meta = with lib; {
    license = licenses.eupl12;
    platforms = platforms.linux;
  };
}
) {}) (_: {})

debug log:

solving 3b8557c ...
found 3b8557c in https://inbox.spectrum-os.org/spectrum-devel/20251128223038.97536-6-yureka@cyberchaos.dev/
found 4bbbe23 in https://spectrum-os.org/git/spectrum
preparing index
index prepared:
100644 4bbbe23ff14a2c3337ec96b36c74c3aa6569f1d1	host/rootfs/default.nix

applying [1/1] https://inbox.spectrum-os.org/spectrum-devel/20251128223038.97536-6-yureka@cyberchaos.dev/
diff --git a/host/rootfs/default.nix b/host/rootfs/default.nix
index 4bbbe23..3b8557c 100644

Checking patch host/rootfs/default.nix...
Applied patch host/rootfs/default.nix cleanly.

index at:
100644 3b8557cd39812937b5fe181a3f0b275fed15e86a	host/rootfs/default.nix

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