Unified home and system modules!

modules/common.nix

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+# Common module
+# -------------
+# All configuration common to ANY host is located here.
+# General configuration and "bare minimum" tools
+
+{ config, pkgs, lib, ... }:
+
+{
+  # - Nix ----------------------------------------
+
+  system.stateVersion = "22.05";
+
+  nix = {
+    package = pkgs.nixFlakes;
+
+    extraOptions = lib.optionalString (config.nix.package == pkgs.nixFlakes)
+      "experimental-features = nix-command flakes";
+
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 14d";
+    };
+
+  };
+
+  # - Locale -------------------------------------
+
+  time.timeZone = "Europe/Madrid";
+  i18n.defaultLocale = "ca_ES.utf8";
+  console.keyMap = "es";
+  services.xserver = {
+    layout = "es";
+    xkbVariant = "cat";
+  };
+
+  # - Packages -----------------------------------
+
+  environment.pathsToLink = [ "/libexec" ];
+  environment.systemPackages = with pkgs; [
+    curl
+    git
+    htop
+    pciutils
+    psmisc
+    vim
+  ];
+
+  # - Modules ------------------------------------
+
+  networking.networkmanager.enable = true;
+
+  samfelag.modules = {
+    shell.utils.enable = true;
+    shell.zsh.enable = true;
+    dev.git.enable = true;
+
+    # May go away from common if not all hosts use it
+    system.tailscale.enable = true;
+  };
+
+}