✨ feat(abbrs): New module for home.shellAbbrs

Allows setting home.shellAbbrs that either get set as Fish shell
abbreviations or converted to shell aliases depending on if Fish is
active.

Abbrs that depend on Fish-specific features get automatically filtered
out.

flake.nix

@@ -46,8 +46,9 @@
             };
 
           modules = [
-            ./home
             inputs.rose-pine.homeManagerModules.rose-pine
+            ./modules/home/shellAbbrs.nix
+            ./home
           ];
         };
     };

home/services/default.nix

@@ -1,19 +1,15 @@
-{ lib, config, ... }:
+{ ... }:
 {
-  # TODO: There's probably some fancy nix attr mapping that can be done to set
-  # these once and convert them to aliases or abbrs depending on shell.
-  programs.fish.shellAbbrs =
-    lib.mkIf (config.programs.fish.enable && config.programs.fish.preferAbbrs)
-      {
-        jf = {
-          position = "command";
-          expansion = "sudo journalctl --follow --unit";
-        };
-        je = {
-          position = "command";
-          expansion = "sudo journalctl --pager-end --unit";
-        };
-      };
+  home.shellAbbrs = {
+    jf = {
+      position = "command";
+      expansion = "sudo journalctl --follow --unit";
+    };
+    je = {
+      position = "command";
+      expansion = "sudo journalctl --pager-end --unit";
+    };
+  };
 
   imports = [
     ./clipboard.nix

modules/home/shellAbbrs.nix

@@ -0,0 +1,102 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+with lib;
+
+let
+  # https://github.com/nix-community/home-manager/blob/master/modules/programs/fish.nix
+  abbrModule = types.submodule {
+    options = {
+      expansion = mkOption {
+        type = with types; nullOr str;
+        default = null;
+        description = ''
+          The command expanded by an abbreviation.
+        '';
+      };
+
+      position = mkOption {
+        type = with types; nullOr str;
+        default = null;
+        example = "anywhere";
+        description = ''
+          If the position is "command", the abbreviation expands only if
+          the position is a command. If it is "anywhere", the abbreviation
+          expands anywhere.
+        '';
+      };
+
+      regex = mkOption {
+        type = with types; nullOr str;
+        default = null;
+        description = ''
+          The regular expression pattern matched instead of the literal name.
+        '';
+      };
+
+      setCursor = mkOption {
+        type = with types; (either bool str);
+        default = false;
+        description = ''
+          The marker indicates the position of the cursor when the abbreviation
+          is expanded. When setCursor is true, the marker is set with a default
+          value of "%".
+        '';
+      };
+
+      function = mkOption {
+        type = with types; nullOr str;
+        default = null;
+        description = ''
+          The fish function expanded instead of a literal string.
+        '';
+      };
+    };
+  };
+
+  removeFishOnly = attrsets.filterAttrs (
+    _: v: if (builtins.isAttrs v) then !((v ? regex) || (v ? setCursor) || (v ? function)) else true
+  );
+
+  abbrToAlias = attrsets.mapAttrs (
+    _: v: if (builtins.isAttrs v) then v.expansion else v
+  ) removeFishOnly;
+in
+{
+  options = {
+    # https://github.com/nix-community/home-manager/blob/master/modules/programs/fish.nix
+    home.shellAbbrs = mkOption {
+      type = with types; attrsOf (either str abbrModule);
+      default = { };
+      example = literalExpression ''
+        {
+          l = "less";
+          gco = "git checkout";
+          "-C" = {
+            position = "anywhere";
+            expansion = "--color";
+          };
+        }
+      '';
+      description = ''
+        An attribute set that maps aliases (the top level attribute names
+        in this option) to abbreviations. Abbreviations are expanded with
+        the longer phrase after they are entered.
+      '';
+    };
+  };
+
+  config =
+    let
+      fishCfg = config.programs.fish;
+      shellAbbrs = config.home.shellAbbrs;
+    in
+    {
+      programs.fish.shellAbbrs = mkIf fishCfg.enable shellAbbrs;
+
+      home.shellAliases = mkIf (!fishCfg.enable) (abbrToAlias shellAbbrs);
+    };
+}