From bdf5331c964e80204caaa7e54a60ef69748f33ed Mon Sep 17 00:00:00 2001
From: Arpit Chakladar <54011232+arpitchakladar@users.noreply.github.com>
Date: Sat, 28 Sep 2024 00:37:34 +0530
Subject: Added ability to change the default program if multiple programs for
 the same purpose are enabled.

---
 home.nix                                         |  7 +++++--
 modules/desktop/terminal/alacritty/default.nix   |  8 ++++++--
 modules/desktop/terminal/default.nix             | 12 ++++++++++--
 modules/desktop/terminal/kitty/default.nix       |  8 ++++++--
 modules/desktop/window-manager/sxhkd/default.nix |  4 ++--
 modules/shell/bash/default.nix                   | 12 +++++++++++-
 modules/shell/default.nix                        | 16 ++++++++++------
 modules/shell/zsh/default.nix                    |  6 +++++-
 modules/tools/file-manager/default.nix           | 10 +++++++++-
 modules/tools/file-manager/lf/default.nix        |  7 ++++++-
 modules/tools/file-manager/nnn/default.nix       |  7 ++++++-
 11 files changed, 76 insertions(+), 21 deletions(-)

diff --git a/home.nix b/home.nix
index 05aaee3..87f9cbb 100644
--- a/home.nix
+++ b/home.nix
@@ -9,8 +9,9 @@
 	desktop.display-server.x11.xinit.enable = true;
 	desktop.popup-manager.rofi.enable = true;
 	desktop.status-bar.polybar.enable = true;
-	# desktop.terminal.alacritty.enable = true;
+	desktop.terminal.alacritty.enable = true;
 	desktop.terminal.kitty.enable = true;
+	desktop.terminal.default = "kitty";
 	desktop.window-manager.bspwm.enable = true;
 	desktop.window-manager.sxhkd.enable = true;
 	desktop.xdg-portal.enable = true;
@@ -21,11 +22,13 @@
 	# Shell
 	shell.bash.enable = true;
 	shell.zsh.enable = true;
+	shell.default = "zsh";
 
 	# Tools
 	tools.editor.neovim.enable = true;
-	# tools.file-manager.lf.enable = true;
+	tools.file-manager.lf.enable = true;
 	tools.file-manager.nnn.enable = true;
+	tools.file-manager.default = "nnn";
 	tools.file-manager.lsd.enable = true;
 	tools.git.enable = true;
 	tools.system-monitor.htop.enable = true;
diff --git a/modules/desktop/terminal/alacritty/default.nix b/modules/desktop/terminal/alacritty/default.nix
index 575fe4e..151e098 100644
--- a/modules/desktop/terminal/alacritty/default.nix
+++ b/modules/desktop/terminal/alacritty/default.nix
@@ -7,7 +7,11 @@
 
 	config = lib.mkIf config.desktop.terminal.alacritty.enable {
 		programs.alacritty.enable = true;
-		desktop.terminal.default = lib.mkDefault "${pkgs.alacritty}/bin/alacritty";
+		desktop.terminal.default = lib.mkDefault "alacritty";
+		desktop.terminal.command =
+			if config.desktop.terminal.default == "alacritty" then
+				lib.mkForce "${pkgs.kitty}/bin/alacritty"
+			else "";
 
 		programs.alacritty.settings = {
 			window = {
@@ -72,7 +76,7 @@
 			};
 
 			shell = {
-				program = config.shell.default;
+				program = config.shell.command;
 			};
 		};
 	};
diff --git a/modules/desktop/terminal/default.nix b/modules/desktop/terminal/default.nix
index ac84471..189c794 100644
--- a/modules/desktop/terminal/default.nix
+++ b/modules/desktop/terminal/default.nix
@@ -7,9 +7,17 @@
 	];
 
 	options.desktop.terminal = {
-		default = lib.mkOption {
+		command = lib.mkOption {
 			type = lib.types.str;
-			description = "Path to the default terminal program.";
+			description = "Command for the terminal.";
+		};
+
+		default = lib.mkOption {
+			type = lib.types.enum [
+				"kitty"
+				"alacritty"
+			];
+			description = "Default terminal.";
 		};
 	};
 }
diff --git a/modules/desktop/terminal/kitty/default.nix b/modules/desktop/terminal/kitty/default.nix
index 8950a46..a34e58a 100644
--- a/modules/desktop/terminal/kitty/default.nix
+++ b/modules/desktop/terminal/kitty/default.nix
@@ -13,7 +13,11 @@
 			}
 		];
 		programs.kitty.enable = true;
-		desktop.terminal.default = lib.mkDefault "${pkgs.kitty}/bin/kitty";
+		desktop.terminal.default = lib.mkDefault "kitty";
+		desktop.terminal.command =
+			if config.desktop.terminal.default == "kitty" then
+				lib.mkForce "${pkgs.kitty}/bin/kitty"
+			else "";
 
 		programs.kitty.settings = with config.scheme.withHashtag; {
 			window_padding_width = config.desktop.window-manager.gap;
@@ -42,7 +46,7 @@
 			selection_background = base03;
 			selection_foreground = base00;
 
-			shell = config.shell.default;
+			shell = config.shell.command;
 		};
 	};
 }
diff --git a/modules/desktop/window-manager/sxhkd/default.nix b/modules/desktop/window-manager/sxhkd/default.nix
index 04fb0cc..c31604b 100644
--- a/modules/desktop/window-manager/sxhkd/default.nix
+++ b/modules/desktop/window-manager/sxhkd/default.nix
@@ -34,12 +34,12 @@
 				${(createKeybinding
 					"t"
 					"Launch terminal.")}
-						= config.desktop.terminal.default;
+						= config.desktop.terminal.command;
 
 				${(createKeybinding
 					"f"
 					"Launch File Manager.")}
-						= "${config.desktop.terminal.default} --title 'File Manager' --class popup -e ${config.tools.file-manager.default}";
+						= "${config.desktop.terminal.command} --title 'File Manager' --class popup -e ${config.tools.file-manager.command}";
 			}
 		];
 	};
diff --git a/modules/shell/bash/default.nix b/modules/shell/bash/default.nix
index ee3b4a8..2e65d60 100644
--- a/modules/shell/bash/default.nix
+++ b/modules/shell/bash/default.nix
@@ -2,10 +2,20 @@
 
 {
 	options.shell.bash = {
-		enable = lib.mkEnableOption "Enables bash.";
+		enable = lib.mkOption {
+			type = lib.types.bool;
+			description = "Enables bash.";
+			default = true;
+		};
 	};
 
 	config = lib.mkIf config.shell.bash.enable {
+		shell.default = lib.mkDefault "bash";
+		shell.command =
+			if config.shell.default == "bash" then
+				lib.mkForce "${pkgs.zsh}/bin/bash"
+			else "";
+
 		programs.bash.enable = true;
 		programs.bash.historyFile = "${config.xdg.cacheHome}/bash/history";
 		programs.bash.shellAliases = config.shell.alias;
diff --git a/modules/shell/default.nix b/modules/shell/default.nix
index 27a919a..c2eada9 100644
--- a/modules/shell/default.nix
+++ b/modules/shell/default.nix
@@ -8,17 +8,21 @@
 
 	options.shell = {
 		default = lib.mkOption {
+			type = lib.types.enum [
+				"bash"
+				"zsh"
+			];
+			description = "Default shell.";
+		};
+
+		command = lib.mkOption {
 			type = lib.types.str;
-			description = "Path to the default shell program.";
+			description = "Command for the default shell.";
 		};
+
 		alias = lib.mkOption {
 			type = lib.types.attrs;
 			description = "Shell aliases.";
 		};
 	};
-
-	config = {
-		shell.default = lib.mkDefault "${pkgs.bash}/bin/bash"; # Set bash as default shell
-		shell.bash.enable = lib.mkDefault true; # Enable bash by default
-	};
 }
diff --git a/modules/shell/zsh/default.nix b/modules/shell/zsh/default.nix
index 7d7a261..0c14b8c 100644
--- a/modules/shell/zsh/default.nix
+++ b/modules/shell/zsh/default.nix
@@ -6,7 +6,11 @@
 	};
 
 	config = lib.mkIf config.shell.zsh.enable {
-		shell.default = "${pkgs.zsh}/bin/zsh";
+		shell.default = lib.mkDefault "zsh";
+		shell.command =
+			if config.shell.default == "zsh" then
+				lib.mkForce "${pkgs.zsh}/bin/zsh"
+			else "";
 
 		programs.zsh.enable = true;
 		programs.zsh.dotDir = ".config/zsh";
diff --git a/modules/tools/file-manager/default.nix b/modules/tools/file-manager/default.nix
index 760584a..4889f5b 100644
--- a/modules/tools/file-manager/default.nix
+++ b/modules/tools/file-manager/default.nix
@@ -9,8 +9,16 @@
 
 	options.tools.file-manager = {
 		default = lib.mkOption {
+			type = lib.types.enum [
+				"nnn"
+				"lf"
+			];
+			description = "Default file manager.";
+		};
+
+		command = lib.mkOption {
 			type = lib.types.str;
-			description = "Path to the default file manager program.";
+			description = "Command for the default file manager program.";
 		};
 	};
 }
diff --git a/modules/tools/file-manager/lf/default.nix b/modules/tools/file-manager/lf/default.nix
index 4cfbba2..bdbefbc 100644
--- a/modules/tools/file-manager/lf/default.nix
+++ b/modules/tools/file-manager/lf/default.nix
@@ -6,7 +6,12 @@
 	};
 
 	config = lib.mkIf config.tools.file-manager.lf.enable {
-		tools.file-manager.default = "${pkgs.nnn}/bin/lf";
+		tools.file-manager.default = lib.mkDefault "lf";
+		tools.file-manager.command =
+			if config.tools.file-manager.default == "lf" then
+				lib.mkForce "${pkgs.lf}/bin/lf"
+			else "";
+
 		programs.lf.enable = true;
 		programs.lf.settings = {
 			hidden = true;
diff --git a/modules/tools/file-manager/nnn/default.nix b/modules/tools/file-manager/nnn/default.nix
index 6244d04..73b5c9d 100644
--- a/modules/tools/file-manager/nnn/default.nix
+++ b/modules/tools/file-manager/nnn/default.nix
@@ -6,7 +6,12 @@
 	};
 
 	config = lib.mkIf config.tools.file-manager.nnn.enable {
-		tools.file-manager.default = "${pkgs.nnn}/bin/nnn -H -d";
+		tools.file-manager.default = lib.mkDefault "nnn";
+		tools.file-manager.command =
+			if config.tools.file-manager.default == "nnn" then
+				lib.mkForce "${pkgs.nnn}/bin/nnn -H -d"
+			else "";
+
 		programs.nnn.enable = true;
 		programs.nnn.package = pkgs.nnn.override ({ withNerdIcons = true; });
 		programs.nnn.plugins.src = "${pkgs.nnn}/share/plugins";
-- 
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