feat(bash): alias completions

modules/home/bash.nix

@@ -0,0 +1,16 @@
+{ config, lib, pkgs, ... }:
+
+let cfg = config.sydnix.bash;
+in {
+  options.sydnix.bash = {
+    enable = lib.mkEnableOption "Bash";
+  };
+
+  imports = [
+    ./bash/complete-alias.nix
+  ];
+
+  config = lib.mkIf cfg.enable {
+    programs.bash.enable = true;
+  };
+}

modules/home/bash/complete-alias.nix

@@ -0,0 +1,16 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.sydnix.bash.complete-alias;
+in {
+  options.sydnix.bash.complete-alias = {
+    enable = lib.mkEnableOption "Alias completion";
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.bash.initExtra = lib.mkAfter ''
+      . ${lib.getExe pkgs.complete-alias}
+      complete -F _complete_alias "''${!BASH_ALIASES[@]}"
+    '';
+  };
+}

modules/home/users/msyds/bash.nix

@@ -6,25 +6,25 @@ in {
   options.sydnix.users.msyds.bash.enable =
     lib.mkEnableOption "Bash, à la msyds";
   config = lib.mkIf cfg.enable {
-    programs.bash = {
-      enable = true;
-      shellOptions = [
-        # Correct minor typos in cd commands.
-        "cdspell"
-        # Implicitly prepend `cd` to directory names.
-        "autocd"
-        # Extra glob power.
-        "extglob"
-        # Recursive glob w/ **.
-        "globstar"
-        # Append to history file.
-        "histappend"
-        # Require user confirmation for commands using expansion.
-        "histverify"
-        # Re-edit failed history substitutions.
-        "histreedit"
-      ];
-    };
+    sydnix.bash.enable = true;
+    sydnix.bash.complete-alias.enable = true;
+
+    programs.bash.shellOptions = [
+      # Correct minor typos in cd commands.
+      "cdspell"
+      # Implicitly prepend `cd` to directory names.
+      "autocd"
+      # Extra glob power.
+      "extglob"
+      # Recursive glob w/ **.
+      "globstar"
+      # Append to history file.
+      "histappend"
+      # Require user confirmation for commands using expansion.
+      "histverify"
+      # Re-edit failed history substitutions.
+      "histreedit"
+    ];
 
     home.shellAliases = {
       nix2json = "nix eval --impure --json --file -";