feat(user:shell): add system modules for zsh/bash user shell configuration

system/hosts/ooksdesk/default.nix

@@ -10,7 +10,7 @@
 
 		systemModules.user = {
 			ooks.enable = true;
-			shell.fish.enable = true;
+			shell = "fish";
 		};
 
 		systemModules.hardware = {

system/hosts/ooksmedia/default.nix

@@ -11,7 +11,7 @@
 
 		systemModules.user = {
 			ooks.enable = true;
-			shell.fish.enable = true;
+			shell = "fish";
 		};
 
 		systemModules.hardware = {

system/hosts/ookst480s/default.nix

@@ -12,7 +12,7 @@
 		systemModules = {
 			user = {
 				ooks.enable = true;
-				shell.fish.enable = true;
+				shell = "fish";
 			};
 			hardware = {
 				cpu.type = "intel";

system/modules/user/shell/bash/default.nix

@@ -0,0 +1,17 @@
+{ lib, config, pkgs, ... }:
+
+let
+  inherit (lib) mkIf;
+  userShell = config.systemModules.user.shell;
+in
+
+{
+  config = mkIf (userShell == "bash") {
+    users.users.ooks.shell = pkgs.bash;
+    programs.bash = {
+      enable = true;
+    };
+    environment.pathsToLink = ["/share/bash-completion"];
+  };
+}
+

system/modules/user/shell/default.nix

@@ -1,40 +1,19 @@
-{ lib, config, ... }:
+{ lib, ... }:
 
 let
-  cfg = config.systemModules.user.shell;
+  inherit (lib) types mkOption;
 in
 
 {
   imports = [
     ./fish
-    # ./bash
-    # ./zsh
+    ./bash
+    ./zsh
   ];
 
-  options.systemModules.user.shell = {
-    fish = {
-      enable = lib.mkEnableOption "Enable fish as the user shell";
-    };
-    zsh = {
-      enable = lib.mkEnableOption "Enable zsh as the user shell";
-    };
-    bash = {
-      enable = lib.mkEnableOption "Enable bash as the user shell";
-    };
-
-  };
-
-   config = { 
-    assertions = [
-      {
-        assertion = 
-          (lib.length (lib.filter (x: x) [
-            cfg.fish.enable or false
-            cfg.zsh.enable or false
-            cfg.bash.enable or false
-          ]) <= 1); 
-        message = "Only one user shell can be active in the configuration";
-      }
-    ];
+  options.systemModules.user.shell = mkOption {
+    type = types.enum ["fish" "zsh" "bash"];
+    default = "zsh";
+    description = "The user shell to use. Select from 'zsh' 'bash' 'fish'";
   };
 }

system/modules/user/shell/fish/default.nix

@@ -1,11 +1,12 @@
 { pkgs, lib, config, ... }:
 
 let
-  cfg = config.systemModules.user.shell.fish;
+  inherit (lib) mkIf;
+  userShell = config.systemModules.user.shell;
 in
 
 {
-  config = lib.mkIf cfg.enable {
+  config = mkIf (userShell == "fish") {
     users.users.ooks.shell = pkgs.fish;
     programs.fish = {
       enable = true;

system/modules/user/shell/zsh/default.nix

@@ -0,0 +1,22 @@
+{ lib, config, pkgs, ... }:
+
+let
+  inherit (lib) mkIf;
+  userShell = config.systemModules.user.shell;
+in
+
+{
+  config = mkIf (userShell == "zsh") {
+    users.users.ooks.shell = pkgs.zsh;
+    programs.zsh = {
+      enable = true;
+      enableCompletion = true;
+      syntaxHighlighting.enable = true;
+      autosuggestions = {
+        enable = true;
+        async = true;
+      };
+    };
+    environment.pathsToLink = ["/share/zsh"];
+  };
+}