base: Add shared zfs options to make links config live close to related config

modules/shared/base/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ./nix
+    ./zfs
     ./zsh
   ];
 

modules/shared/base/nix/default.nix

@@ -36,6 +36,7 @@ in
   };
 
   config = {
+    chvp.base.zfs.homeLinks = (lib.optional config.chvp.base.nix.enableDirenv { path = ".local/share/direnv"; type = "cache"; });
     nix = {
       gc = {
         automatic = true;

modules/shared/base/zfs/default.nix

@@ -0,0 +1,49 @@
+{ config, lib, ... }:
+
+# Define shared options so that links configuration can live close to actual configuration
+{
+  options.chvp.base.zfs = {
+    enable = lib.mkOption {
+      default = false;
+      example = true;
+    };
+    encrypted = lib.mkOption {
+      default = false;
+      example = true;
+    };
+    systemLinks = lib.mkOption {
+      default = [ ];
+      example = [
+        { path = "/var/lib/docker"; type = "cache"; }
+        { path = "/var/lib/docker/volumes"; type = "data"; }
+      ];
+    };
+    homeLinks = lib.mkOption {
+      default = [ ];
+      example = [
+        { path = ".config/syncthing"; type = "data"; }
+        { path = ".cache/nix-index"; type = "cache"; }
+      ];
+    };
+    ensureSystemExists = lib.mkOption {
+      default = [ ];
+      example = [ "/data/etc/ssh" ];
+    };
+    ensureHomeExists = lib.mkOption {
+      default = [ ];
+      example = [ ".ssh" ];
+    };
+    backups = lib.mkOption {
+      default = [ ];
+      example = [{
+        path = "rpool/safe/data";
+        remotePath = "zdata/recv/<hostname>/safe/data";
+        fast = false;
+        location = "lasting-integrity.vanpetegem.me";
+      }];
+    };
+    rootDataset = lib.mkOption {
+      example = "rpool/local/root";
+    };
+  };
+}

modules/shared/base/zsh/default.nix

@@ -65,6 +65,8 @@ in
 
   config = {
     programs.zsh.enable = true;
+    chvp.base.zfs.homeLinks = lib.mkIf (builtins.elem username config.chvp.base.zsh.usersToConfigure) [{ path = ".local/share/autojump"; type = "cache"; }];
+    chvp.base.zfs.systemLinks = lib.mkIf (builtins.elem "root" config.chvp.base.zsh.usersToConfigure) [{ path = "/root/.local/share/autojump"; type = "cache"; }];
   } // {
     home-manager.users = builtins.foldl' (a: b: a // b) { } (
       builtins.map