feat: Readline

modules/home/users/crumb/readline.nix

@@ -0,0 +1,45 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.sydnix.users.crumb.readline;
+in {
+  options.sydnix.users.crumb.readline.enable
+    = lib.mkEnableOption "Readline, à la crumb";
+
+  config = lib.mkIf cfg.enable {
+    programs.readline = {
+      enable = true;
+      extraConfig = ''
+        # Unfortunately, the Vi mode is... bad!
+        set editing-mode emacs
+
+        # Mimmic Comint/Eshell binds.
+        C-k: history-substring-search-backward
+        C-j: history-substring-search-forward
+        C-s: reverse-search-history
+
+        set history-preserve-point on
+
+        set bell-style none
+
+        set blink-matching-paren on
+
+        # Inhibit that god-awful double-tab bullshit.
+        set show-all-if-ambiguous on
+        set show-all-if-unmodified on
+        set completion-ignore-case on
+        set completion-map-case on
+
+        # Append a '/' when completing the full name of a symlink to a
+        # directory.  This mirrors the behaviour when completing real
+        # directories.
+        set mark-symlinked-directories on
+
+        # Visually hint at a file's type in completions.
+        set visible-stats on
+        set colored-stats on
+      '';
+    };
+  };
+}
+