configure bat

homes/me/default.nix

@@ -31,8 +31,10 @@
       ntv = "nix-search-tv";
       rebuild = "nh os switch ~/flake";
       trybuild = "nh os test ~/flake";
-      brip = "batgrep"; # bat + ripgrep
-      man = "batman"; # bat + man
+
+      # shell utilities
+      rgf = "rg --files | rg";
+      watch = "viddy";
     };
 
     pointerCursor = {
@@ -45,14 +47,13 @@
 
     packages = with pkgs; [
       # for services.gnome-keyring
-      pkgs.gcr # provides org.gnome.keyring.SystemPrompter
+      gcr # provides org.gnome.keyring.SystemPrompter
       seahorse # gui
-      krita
 
+      krita
       tor-browser
 
       fuzzel
-
       speedtest-cli
     ];
   };

homes/modules/bat.nix

@@ -1,24 +1,109 @@
-{
-  config,
-  pkgs,
-  ...
-}: {
-  # like `/bin/cat` but with syntax highlighting
-  # TODO: change the pager (maybe use Github:sachaos/viddy instead)
-  programs.bat = {
-    enable = true;
-    config = {
-      pager = "less -FR";
-      theme = "Dracula";
-    };
-  };
+let
+  # Module Meta Configuration
+  setShellAliases = true;
+  supportBash = true;
+  supportZsh = true;
+  supportFish = true;
+in
+  {
+    osConfig,
+    config,
+    pkgs,
+    lib,
+    username,
+    ...
+  }: let
+    inherit
+      (builtins)
+      elemAt
+      ;
 
-  # other commands that make normal utils prettier
-  home.packages = with pkgs.bat-extras; [
-    batdiff
-    batgrep
-    batman
-    batwatch
-    prettybat
-  ];
-}
+    inherit
+      (lib)
+      flip
+      mkIf
+      optional
+      splitString
+      ;
+
+    cfg = config.programs.bat;
+
+    # NOTE: `<derivation>.pname` can be used instead of `<derivation>.meta.mainProgram`
+    # NOTE: but then `pkgs.bash` would return `"bash-interactive"` which is annoying...
+    shellPkg = osConfig.users.users.${username}.shell;
+    shell = shellPkg.meta.mainProgram;
+
+    pager =
+      cfg.config.pager
+      |> splitString " "
+      |> flip elemAt 0;
+  in {
+    programs.bat = {
+      enable = true;
+      config = {
+        # WARNING: pager must be set for this module to function
+        # NOTE: not sure whether to use ov/moor/viddy as my pager?
+        pager = "less -FR";
+        # theme = "Dracula";
+      };
+    };
+
+    home = {
+      shellAliases = mkIf setShellAliases {
+        bat = "prettybat";
+        cat = "prettybat";
+        diff = "batdiff";
+        brg = "batgrep";
+        man = "batman";
+        # watch = "batwatch"; # NOTE: using viddy instead atm
+      };
+
+      sessionVariables = {
+        PAGER = pager;
+
+        # REF: https://github.com/eth-p/bat-extras/blob/master/doc/batpipe.md
+        BATPIPE_ENABLE_COLOR = "true";
+        BATPIPE_INSIDE_LESS = "true";
+        BATPIPE_TERM_WIDTH = "-"; # hyphone -> auto detect
+      };
+
+      packages = with pkgs.bat-extras;
+        [
+          batdiff
+          batgrep
+          batman
+          batpipe
+          batwatch
+          prettybat
+        ]
+        ++ (with pkgs; [
+          bat
+          entr # required by pkgs.bat-extras.batwatch
+          ripgrep # required by pkgs.bat-extras.batgrep
+          delta # required by pkgs.bat-extras.batdiff
+        ])
+        ++ optional (pkgs?${pager}) pkgs.${pager};
+    };
+
+    # Configure the user's shell to source batpipe
+    # WARNING: only currently supports bash, zsh, & fish
+    programs = {
+      bash = mkIf (supportBash || shell == "bash") {
+        initExtra = ''
+          eval "$(batpipe)"
+        '';
+      };
+
+      zsh = mkIf (supportZsh || shell == "zsh") {
+        initContent = ''
+          eval "$(batpipe)"
+        '';
+      };
+
+      fish = mkIf (supportFish || shell == "fish") {
+        interactiveShellInit = ''
+          eval (batpipe)
+        '';
+      };
+    };
+  }

homes/modules/fish.nix

@@ -1,5 +1,4 @@
 {
-  config,
   lib,
   pkgs,
   ...
@@ -60,9 +59,6 @@
           curl -sL "https://www.gitignore.io/api/$type"
         end
 
-        # ripgrep on files
-        function rgf
-          rg --files | rg $args
         end
 
         function decompile
@@ -70,8 +66,6 @@
         end
 
         set -g fish_greeting (rand_greet)
-
-
       '';
 
       shellAliases = {