refactor: modularize flake and import nixpkgs

ci.nix

@@ -0,0 +1,19 @@
+# CI: https://github.com/Mic92/dotfiles/blob/c2f538934d67417941f83d8bb65b8263c43d32ca/flake.nix#L168
+{
+  system,
+  pkgs,
+  self,
+}: let
+  inherit (pkgs.lib) filterAttrs mapAttrs' nameValuePair;
+
+  nixosMachines =
+    mapAttrs'
+    (name: config: nameValuePair "nixos-${name}" config.config.system.build.toplevel)
+    ((filterAttrs (_: config: config.pkgs.system == system)) self.nixosConfigurations);
+
+  devShells =
+    mapAttrs'
+    (n: nameValuePair "devShell-${n}")
+    self.devShells;
+in
+  nixosMachines // devShells

common/default.nix

@@ -23,10 +23,6 @@
     ../modules/nvidia.nix
   ];
 
-  nixpkgs = {
-    config.allowUnfree = true;
-    overlays = import ./overlays inputs;
-  };
   boot.tmp.useTmpfs = true;
 
   nix = {

common/home/neovim/langs/python.nix

@@ -1,8 +1,7 @@
 {
+  basedpyrightPkgs,
   config,
   lib,
-  pkgs,
-  basedpyright,
   ...
 }: let
   inherit (config.vars) neovimIde;
@@ -13,7 +12,7 @@ in
         withPython3 = true;
 
         extraPackages = [
-          basedpyright.legacyPackages.${pkgs.system}.basedpyright
+          basedpyrightPkgs.basedpyright
         ];
 
         extraLuaConfig =

common/nix-on-droid.nix

@@ -23,16 +23,10 @@
     substituters = [
       # Nix-community
       "https://nix-community.cachix.org"
-
-      # FIXME: cache doesn't work
-      # Personal config cache
-      # "https://cache.nelim.org"
     ];
     trustedPublicKeys = [
       # Nix-community
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-      # Personal config cache
-      # "cache.nelim.org:JmFqkUdH11EA9EZOFAGVHuRYp7EbsdJDHvTQzG2pPyY="
     ];
   };
 

devices/android/default.nix

@@ -1,27 +1,72 @@
 {
-  home-manager,
-  nix-on-droid,
-  nixpkgs,
+  config,
+  lib,
+  pkgs,
   ...
-} @ inputs:
-nix-on-droid.lib.nixOnDroidConfiguration rec {
-  extraSpecialArgs = inputs;
-  home-manager-path = home-manager.outPath;
-  pkgs = import nixpkgs {
-    system = "aarch64-linux";
-    overlays = import ../../common/overlays inputs;
+}: {
+  vars = {
+    mainUser = "nix-on-droid";
+    hostName = "localhost";
+    neovimIde = false;
   };
 
-  modules = [
-    {
-      options = with pkgs.lib; {
-        environment.variables.FLAKE = mkOption {
-          type = with types; nullOr str;
-        };
-      };
-    }
-    {home-manager.extraSpecialArgs = inputs;}
-    ../../common/nix-on-droid.nix
-    ./nix-on-droid.nix
-  ];
+  environment.variables.FLAKE = "/data/data/com.termux.nix/files/home/.nix";
+
+  terminal.font = "${(pkgs.nerdfonts.override {
+    fonts = [
+      "JetBrainsMono"
+    ];
+  })}/share/fonts/truetype/NerdFonts/JetBrainsMonoNerdFontMono-Regular.ttf";
+
+  environment.packages =
+    (with pkgs; [
+      diffutils
+      findutils
+      utillinux
+      tzdata
+      hostname
+      man
+      gnugrep
+      ripgrep
+      gnupg
+      gnused
+      gnutar
+      bzip2
+      gzip
+      xz
+      zip
+      unzip
+      openssh
+      perl
+      which
+      alejandra
+    ])
+    ++ [
+      (pkgs.writeShellApplication {
+        name = "switch";
+        runtimeInputs = with pkgs; [
+          nix-output-monitor
+        ];
+        text = ''
+          exec nix-on-droid ${lib.concatStringsSep " " [
+            "switch"
+            "--flake ${config.environment.variables.FLAKE}"
+            "--builders ssh-ng://matt@100.64.0.7"
+            ''"$@"''
+            "|&"
+            "nom"
+          ]}
+        '';
+      })
+    ];
+
+  environment.etcBackupExtension = ".bak";
+  environment.motd = null;
+  home-manager.backupFileExtension = "hm-bak";
+
+  # Set your time zone.
+  time.timeZone = "America/Montreal";
+
+  # No touchy
+  system.stateVersion = "23.05";
 }

devices/android/nix-on-droid.nix

@@ -1,72 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}: {
-  vars = {
-    mainUser = "nix-on-droid";
-    hostName = "localhost";
-    neovimIde = false;
-  };
-
-  environment.variables.FLAKE = "/data/data/com.termux.nix/files/home/.nix";
-
-  terminal.font = "${(pkgs.nerdfonts.override {
-    fonts = [
-      "JetBrainsMono"
-    ];
-  })}/share/fonts/truetype/NerdFonts/JetBrainsMonoNerdFontMono-Regular.ttf";
-
-  environment.packages =
-    (with pkgs; [
-      diffutils
-      findutils
-      utillinux
-      tzdata
-      hostname
-      man
-      gnugrep
-      ripgrep
-      gnupg
-      gnused
-      gnutar
-      bzip2
-      gzip
-      xz
-      zip
-      unzip
-      openssh
-      perl
-      which
-      alejandra
-    ])
-    ++ [
-      (pkgs.writeShellApplication {
-        name = "switch";
-        runtimeInputs = with pkgs; [
-          nix-output-monitor
-        ];
-        text = ''
-          exec nix-on-droid ${lib.concatStringsSep " " [
-            "switch"
-            "--flake ${config.environment.variables.FLAKE}"
-            "--builders ssh-ng://matt@100.64.0.7"
-            ''"$@"''
-            "|&"
-            "nom"
-          ]}
-        '';
-      })
-    ];
-
-  environment.etcBackupExtension = ".bak";
-  environment.motd = null;
-  home-manager.backupFileExtension = "hm-bak";
-
-  # Set your time zone.
-  time.timeZone = "America/Montreal";
-
-  # No touchy
-  system.stateVersion = "23.05";
-}

flake.in.nix

@@ -42,39 +42,29 @@
     secrets,
     ...
   }: let
+    inherit (import ./lib.nix inputs) mkNixOS mkNixOnDroid mkPkgs;
+
     supportedSystems = ["x86_64-linux" "aarch64-linux"];
 
     perSystem = attrs:
-      nixpkgs.lib.genAttrs supportedSystems (system: let
-        pkgs = nixpkgs.legacyPackages.${system};
-      in
-        attrs system pkgs);
-
-    # Default system
-    mkNixOS = mods:
-      nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        specialArgs = inputs;
-        modules =
-          [
-            {home-manager.extraSpecialArgs = inputs;}
-            ./common
-          ]
-          ++ mods;
-      };
+      nixpkgs.lib.genAttrs supportedSystems (system:
+        attrs system (mkPkgs system nixpkgs));
   in {
     nixosConfigurations = {
+      # Desktops
       wim = mkNixOS [
         ./devices/wim
         secrets.nixosModules.default
       ];
       binto = mkNixOS [./devices/binto];
 
+      # NAS
       nos = mkNixOS [
         ./devices/nos
         secrets.nixosModules.nos
       ];
 
+      # Build / test server
       servivi = mkNixOS [
         ./devices/servivi
         secrets.nixosModules.servivi
@@ -103,20 +93,7 @@
       ];
     };
 
-    nixOnDroidConfigurations.default = import ./devices/android inputs;
-
-    formatter = perSystem (_: pkgs: pkgs.alejandra);
-
-    # CI: https://github.com/Mic92/dotfiles/blob/c2f538934d67417941f83d8bb65b8263c43d32ca/flake.nix#L168
-    checks = perSystem (system: pkgs: let
-      inherit (pkgs.lib) filterAttrs mapAttrs' nameValuePair;
-
-      nixosMachines = mapAttrs' (
-        name: config: nameValuePair "nixos-${name}" config.config.system.build.toplevel
-      ) ((filterAttrs (_: config: config.pkgs.system == system)) self.nixosConfigurations);
-      devShells = mapAttrs' (n: nameValuePair "devShell-${n}") self.devShells;
-    in
-      nixosMachines // devShells);
+    nixOnDroidConfigurations.default = mkNixOnDroid [./devices/android];
 
     devShells = perSystem (_: pkgs: {
       default = pkgs.mkShell {
@@ -149,5 +126,12 @@
           ]);
       };
     });
+
+    formatter = perSystem (_: pkgs: pkgs.alejandra);
+
+    # For nix-fast-build
+    checks =
+      perSystem (system: pkgs:
+        import ./ci.nix {inherit system pkgs self;});
   };
 }

lib.nix

@@ -0,0 +1,57 @@
+{
+  basedpyright,
+  home-manager,
+  nix-on-droid,
+  nixpkgs,
+  ...
+} @ inputs: rec {
+  # Import pkgs from a nixpkgs
+  mkPkgs = system: input:
+    import input {
+      inherit system;
+      config.allowUnfree = true;
+      overlays = import ./common/overlays inputs;
+    };
+
+  # Function that makes the attrs that make up the specialArgs
+  mkArgs = system:
+    inputs
+    // {
+      pkgs = mkPkgs system nixpkgs;
+      basedpyrightPkgs = mkPkgs system basedpyright;
+    };
+
+  # Default system
+  mkNixOS = mods:
+    nixpkgs.lib.nixosSystem rec {
+      system = "x86_64-linux";
+      specialArgs = mkArgs system;
+      modules =
+        [
+          {home-manager.extraSpecialArgs = specialArgs;}
+          ./common
+        ]
+        ++ mods;
+    };
+
+  mkNixOnDroid = mods:
+    nix-on-droid.lib.nixOnDroidConfiguration rec {
+      extraSpecialArgs = mkArgs "aarch64-linux";
+      home-manager-path = home-manager.outPath;
+      pkgs = extraSpecialArgs.pkgs;
+
+      modules =
+        [
+          {
+            options = with pkgs.lib; {
+              environment.variables.FLAKE = mkOption {
+                type = with types; nullOr str;
+              };
+            };
+          }
+          {home-manager = {inherit extraSpecialArgs;};}
+          ./common/nix-on-droid.nix
+        ]
+        ++ mods;
+    };
+}