ion: Add module (#2625)

Co-authored-by: Nicolas Berbiche <nic.berbiche@gmail.com>
Co-authored-by: Matthieu Coudron <teto@users.noreply.github.com>

.github/CODEOWNERS

@@ -421,3 +421,5 @@ Makefile                                              @thiagokokada
 
 /modules/services/swayidle.nix                        @c0deaddict
 /tests/modules/services/swayidle                      @c0deaddict
+
+/modules/programs/ion.nix                             @jo1gi

modules/modules.nix

@@ -80,6 +80,7 @@ let
     ./programs/i3status-rust.nix
     ./programs/i3status.nix
     ./programs/info.nix
+    ./programs/ion.nix
     ./programs/irssi.nix
     ./programs/java.nix
     ./programs/jq.nix

modules/programs/exa.nix

@@ -32,5 +32,6 @@ in {
 
     programs.fish.shellAliases = mkIf cfg.enableAliases aliases;
 
+    programs.ion.shellAliases = mkIf cfg.enableAliases aliases;
   };
 }

modules/programs/ion.nix

@@ -0,0 +1,59 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.ion;
+
+  aliasesStr = concatStringsSep "\n"
+    (mapAttrsToList (k: v: "alias ${k} = ${escapeShellArg v}")
+      cfg.shellAliases);
+in {
+  meta.maintainers = [ maintainers.jo1gi ];
+
+  options.programs.ion = {
+    enable = mkEnableOption "the Ion Shell. Compatible with Redox and Linux";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.ion;
+      defaultText = literalExpression "pkgs.ion";
+      description = ''
+        The ion package to install. May be used to change the version.
+      '';
+    };
+
+    initExtra = mkOption {
+      type = types.lines;
+      default = "";
+      description = ''
+        Ion script which is called during ion initialization.
+      '';
+    };
+
+    shellAliases = mkOption {
+      type = with types; attrsOf str;
+      default = { };
+      example = literalExpression ''
+        {
+          g = "git";
+        }
+      '';
+      description = ''
+        An attribute set that maps aliases (the top level attribute names
+        in this option) to command strings or directly to build outputs.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ cfg.package ];
+
+    xdg.configFile."ion/initrc".text = ''
+      # Aliases
+      ${aliasesStr}
+
+      ${cfg.initExtra}
+    '';
+  };
+}

modules/programs/starship.nix

@@ -81,6 +81,14 @@ in {
         Whether to enable Fish integration.
       '';
     };
+
+    enableIonIntegration = mkOption {
+      default = true;
+      type = types.bool;
+      description = ''
+        Whether to enable Ion integration.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
@@ -107,5 +115,11 @@ in {
         eval (${starshipCmd} init fish)
       end
     '';
+
+    programs.ion.initExtra = mkIf cfg.enableIonIntegration ''
+      if test $TERM != "dumb" && not exists -s INSIDE_EMACS || test $INSIDE_EMACS = "vterm"
+        eval $(${starshipCmd} init ion)
+      end
+    '';
   };
 }