complete rework v3

parts/modules/shell/fish/default.nix

@@ -0,0 +1,42 @@
+{
+  username,
+  pkgs,
+  ...
+}: {
+  config = {
+    programs.fish.enable = true;
+    users.users.${username}.shell = pkgs.fish;
+
+    # Fish enables generateCaches by default, which causes slow builds
+    documentation.man.generateCaches = false;
+
+    fireproof.home-manager.programs.fish = {
+      enable = true;
+      shellInit = ''
+
+        ${builtins.readFile ./theme.fish}
+
+      '';
+      plugins = [
+        {
+          name = "to-fish";
+          src = pkgs.fetchFromGitHub {
+            owner = "joehillen";
+            repo = "to-fish";
+            rev = "52b151cfe67c00cb64d80ccc6dae398f20364938";
+            sha256 = "sha256-DfDsU/qY2XdYlkLISIOv02ggHfKEpb+YompNWWjs5/A=";
+          };
+        }
+        {
+          name = "theme-bobthefish";
+          src = pkgs.fetchFromGitHub {
+            owner = "oh-my-fish";
+            repo = "theme-bobthefish";
+            rev = "e3b4d4eafc23516e35f162686f08a42edf844e40";
+            hash = "sha256-cXOYvdn74H4rkMWSC7G6bT4wa9d3/3vRnKed2ixRnuA=";
+          };
+        }
+      ];
+    };
+  };
+}