refactoring for iServer and isWorkstation: part 3

hosts/io/boot.nix

@@ -0,0 +1,16 @@
+{ ... }:
+
+{
+  boot = {
+    # TODO check if future kernel versions fix boot issue with systemd initrd with tpm
+    initrd.systemd.tpm2.enable = false;
+    kernelParams = [
+      "nosgx"
+      "i915.fastboot=1"
+      "mem_sleep_default=deep"
+    ];
+    extraModprobeConfig = ''
+      options snd-intel-dspcfg dsp_driver=3
+    '';
+  };
+}

hosts/io/default.nix

@@ -0,0 +1,11 @@
+{ ... }:
+
+{
+  imports = [
+    ./boot
+    ./ephermal.nix
+    ./hardware-configuration.nix
+    ./programs.nix
+    ./services.nix
+  ];
+}

hosts/io/ephermal.nix

@@ -0,0 +1,46 @@
+{ ... }:
+
+{
+  boot.initrd.systemd.services.recreate-root = {
+    description = "Rolling over and creating new filesystem root";
+    requires = [ "initrd-root-device.target" ];
+    after = [
+      "local-fs-pre.target"
+      "initrd-root-device.target"
+    ];
+    requiredBy = [ "initrd-root-fs.target" ];
+    before = [ "sysroot.mount" ];
+    unitConfig = {
+      AssertPathExists = "/etc/initrd-release";
+      DefaultDependencies = false;
+    };
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+    script = ''
+      mkdir /btrfs_tmp
+      mount /dev/disk/by-uuid/3638cea6-5503-43cc-aa4f-3d37ebedad2f /btrfs_tmp
+      if [[ -e /btrfs_tmp/@root ]]; then
+        mkdir -p /btrfs_tmp/old_roots
+        timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/@root)" "+%Y-%m-%-d_%H:%M:%S")
+        mv /btrfs_tmp/@root "/btrfs_tmp/old_roots/$timestamp"
+      fi
+
+      delete_subvolume_recursively() {
+        IFS=$'\n'
+        for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+          delete_subvolume_recursively "/btrfs_tmp/$i"
+        done
+        btrfs subvolume delete "$1"
+      }
+
+      for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
+        delete_subvolume_recursively "$i"
+      done
+
+      btrfs subvolume create /btrfs_tmp/@root
+      umount /btrfs_tmp
+    '';
+  };
+}

hosts/io/hardware-configuration.nix

@@ -0,0 +1,83 @@
+{
+  config,
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+
+  boot = {
+    initrd = {
+      availableKernelModules = [
+        "xhci_pci"
+        "ahci"
+        "usb_storage"
+        "sd_mod"
+        "sdhci_pci"
+      ];
+      luks.devices."enc" = {
+        device = "/dev/disk/by-uuid/8018720e-42dd-453c-b374-adaa02eb48c9";
+        keyFile = "/dev/disk/by-partuuid/cbc7e305-d32d-4250-b6ae-6a8264ea096e";
+      };
+    };
+    kernelModules = [ "kvm-intel" ];
+  };
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-uuid/3638cea6-5503-43cc-aa4f-3d37ebedad2f";
+      fsType = "btrfs";
+      options = [
+        "subvol=@root"
+        "noatime"
+        "compress=zstd"
+      ];
+    };
+    "/home" = {
+      device = "/dev/disk/by-uuid/3638cea6-5503-43cc-aa4f-3d37ebedad2f";
+      fsType = "btrfs";
+      options = [
+        "subvol=@home"
+        "noatime"
+        "compress=zstd"
+      ];
+    };
+    "/nix" = {
+      device = "/dev/disk/by-uuid/3638cea6-5503-43cc-aa4f-3d37ebedad2f";
+      fsType = "btrfs";
+      options = [
+        "subvol=@nix"
+        "noatime"
+        "compress=zstd"
+      ];
+    };
+    "/persistent" = {
+      device = "/dev/disk/by-uuid/3638cea6-5503-43cc-aa4f-3d37ebedad2f";
+      fsType = "btrfs";
+      options = [
+        "subvol=@persistent"
+        "noatime"
+        "compress=zstd"
+      ];
+    };
+    "/boot/efi" = {
+      device = "/dev/disk/by-uuid/31C9-08FF";
+      fsType = "vfat";
+      options = [
+        "noatime"
+        "fmask=0077"
+        "dmask=0077"
+      ];
+    };
+  };
+
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+
+  networking.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hosts/io/programs.nix

@@ -0,0 +1,34 @@
+{ pkgs, ... }:
+
+let
+  cml-ucm-conf = pkgs.alsa-ucm-conf.overrideAttrs {
+    wttsrc = pkgs.fetchFromGitHub {
+      owner = "WeirdTreeThing";
+      repo = "chromebook-ucm-conf";
+      rev = "b6ce2a7";
+      hash = "sha256-QRUKHd3RQmg1tnZU8KCW0AmDtfw/daOJ/H3XU5qWTCc=";
+    };
+    postInstall = ''
+      echo "v0.4.1" > $out/chromebook.patched
+      cp -R $wttsrc/{common,codecs,platforms} $out/share/alsa/ucm2
+      cp -R $wttsrc/{cml,sof-rt5682} $out/share/alsa/ucm2/conf.d
+    '';
+  };
+in
+
+{
+  environment = {
+    systemPackages = with pkgs; [
+      maliit-keyboard
+      sof-firmware
+    ];
+    sessionVariables.ALSA_CONFIG_UCM2 = "${cml-ucm-conf}/share/alsa/ucm2";
+  };
+
+  # TODO: remove once gmodena/nix-flatpak/issues/45 fixed
+  systemd.services."flatpak-managed-install" = {
+    serviceConfig = {
+      ExecStartPre = "${pkgs.coreutils}/bin/sleep 5";
+    };
+  };
+}

hosts/io/services.nix

@@ -0,0 +1,52 @@
+{ ... }:
+
+{
+  services = {
+    keyd = {
+      enable = true;
+      keyboards.main = {
+        ids = [ "0001:0001" ];
+        settings = {
+          main = {
+            meta = "overload(meta, esc)";
+            f1 = "back";
+            f2 = "forward";
+            f3 = "refresh";
+            f4 = "M-f11";
+            f5 = "M-w";
+            f6 = "brightnessdown";
+            f7 = "brightnessup";
+            f8 = "timeout(mute, 200, micmute)";
+            f9 = "play";
+            f10 = "timeout(nextsong, 200, previoussong)";
+            f13 = "delete";
+            "102nd" = "layer(function)";
+          };
+          shift = {
+            leftshift = "capslock";
+            rightshift = "capslock";
+          };
+          function = {
+            escape = "f1";
+            f1 = "f2";
+            f2 = "f3";
+            f3 = "f4";
+            f4 = "f5";
+            f5 = "f6";
+            f6 = "f7";
+            f7 = "f8";
+            f8 = "f9";
+            f9 = "f10";
+            f10 = "f11";
+            f13 = "f12";
+            y = "sysrq";
+            k = "home";
+            l = "pageup";
+            "," = "end";
+            "." = "pagedown";
+          };
+        };
+      };
+    };
+  };
+}