Add rbw SSH socket support in home-manager modules

- Introduced a new module `rbw-ssh-socket.nix` to manage SSH_AUTH_SOCK for rbw.
- Updated `default.nix` to utilize the new SSH socket variable for session management.
- Refactored Bash and Fish shell configurations to use the new module for setting SSH_AUTH_SOCK, improving maintainability and consistency across shell environments.

modules/wisdom/shells/bash.nix

@@ -1,9 +1,10 @@
-{ ... }: {
+{ self, ... }: {
   flake.homeManagerModules.wisdomShellBash =
     { config, lib, ... }:
     let
       root = config.chiasson.home;
       cfg = config.chiasson.home.shell.bash;
+      rbw = self.lib.rbwSshSocket;
     in
     {
       options.chiasson.home.shell.bash.enable = lib.mkEnableOption "Bash + rbw SSH socket env in profile/init." // {
@@ -13,24 +14,8 @@
       config = lib.mkIf (root.enable && cfg.enable) {
         programs.bash = {
           enable = true;
-          profileExtra = ''
-            if [ -z "''${SSH_AUTH_SOCK:-}" ]; then
-              if [ -n "''${XDG_RUNTIME_DIR:-}" ]; then
-                export SSH_AUTH_SOCK="$XDG_RUNTIME_DIR/rbw/ssh-agent-socket"
-              else
-                export SSH_AUTH_SOCK="/run/user/$(id -u)/rbw/ssh-agent-socket"
-              fi
-            fi
-          '';
-          initExtra = ''
-            if [ -z "''${SSH_AUTH_SOCK:-}" ]; then
-              if [ -n "''${XDG_RUNTIME_DIR:-}" ]; then
-                export SSH_AUTH_SOCK="$XDG_RUNTIME_DIR/rbw/ssh-agent-socket"
-              else
-                export SSH_AUTH_SOCK="/run/user/$(id -u)/rbw/ssh-agent-socket"
-              fi
-            fi
-          '';
+          profileExtra = rbw.bashSnippet;
+          initExtra = rbw.bashSnippet;
         };
       };
     };

modules/wisdom/shells/fish.nix

@@ -1,9 +1,10 @@
-{ ... }: {
+{ self, ... }: {
   flake.homeManagerModules.wisdomShellFish =
     { config, lib, pkgs, ... }:
     let
       root = config.chiasson.home;
       cfg = config.chiasson.home.shell.fish;
+      rbw = self.lib.rbwSshSocket;
     in
     {
       options.chiasson.home.shell.fish = {
@@ -19,21 +20,13 @@
       };
 
       config = lib.mkIf (root.enable && cfg.enable) {
-        # `fishPlugins.grc` only installs the plugin; the wrapper invokes the `grc` binary.
         home.packages = [ pkgs.grc ];
 
         programs.fish = {
           enable = true;
           interactiveShellInit = ''
             set fish_greeting ""
-            if test -z "$SSH_AUTH_SOCK"
-              if test -n "$XDG_RUNTIME_DIR"
-                set -gx SSH_AUTH_SOCK "$XDG_RUNTIME_DIR/rbw/ssh-agent-socket"
-              else
-                set -l _hm_uid (${pkgs.coreutils}/bin/id -u)
-                set -gx SSH_AUTH_SOCK "/run/user/$_hm_uid/rbw/ssh-agent-socket"
-              end
-            end
+            ${rbw.fishSnippet pkgs}
           '';
           plugins = [
             {