From 25e6aecd5c51ded411bb600da70c260a813f2e66 Mon Sep 17 00:00:00 2001
From: mat ess <mat@mat.services>
Date: Mon, 28 Nov 2022 16:55:43 -0500
Subject: [PATCH] Add helix theme switching

---
 darwin/bootstrap.nix                     |  4 +-
 flake.nix                                |  5 ++-
 home/fish.nix                            |  2 +-
 home/helix.nix                           | 30 +++++++++++++++
 home/programs.nix                        | 12 +-----
 modules/home/programs/helix/extras.nix   | 48 ++++++++++++++++++++++++
 modules/home/programs/kakoune/extras.nix |  2 -
 7 files changed, 85 insertions(+), 18 deletions(-)
 create mode 100644 home/helix.nix
 create mode 100644 modules/home/programs/helix/extras.nix

diff --git a/darwin/bootstrap.nix b/darwin/bootstrap.nix
index 308179e..b634e15 100644
--- a/darwin/bootstrap.nix
+++ b/darwin/bootstrap.nix
@@ -52,8 +52,8 @@
       end
     end
   '';
-  environment.variables.SHELL = "${pkgs.fish}/bin/fish";
-  environment.loginShell = "${pkgs.fish}/bin/fish";
+  environment.variables.SHELL = "/run/current-system/sw/bin/fish";
+  environment.loginShell = "/run/current-system/sw/bin/fish";
 
   # Install and setup ZSH to work with nix(-darwin) as well
   programs.zsh.enable = true;
diff --git a/flake.nix b/flake.nix
index 5a4062c..e217b6f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -287,6 +287,7 @@
         files = import ./home/files.nix;
         fish = import ./home/fish.nix;
         git = import ./home/git.nix;
+        helix = import ./home/helix.nix;
         kitty = import ./home/kitty.nix;
         programs = import ./home/programs.nix;
         starship = import ./home/starship.nix;
@@ -298,8 +299,8 @@
           darwin.fullCopies = true;
         };
         # modules
-        # TODO: migrate to helix
-        # programs-kakoune-extras = import ./modules/home/programs/kakoune/extras.nix;
+        programs-kakoune-extras = import ./modules/home/programs/kakoune/extras.nix; # currently unused
+        programs-helix-extras = import ./modules/home/programs/helix/extras.nix;
         programs-kitty-extras = import ./modules/home/programs/kitty/extras.nix;
         home-primary-user = { lib, ... }: {
           options.home.primaryUser =
diff --git a/home/fish.nix b/home/fish.nix
index f4e373a..98a8112 100644
--- a/home/fish.nix
+++ b/home/fish.nix
@@ -15,7 +15,7 @@
     }
   ];
 
-  home.file."${config.xdg.configHome}/fish/fish_plugins".text = ''
+  xdg.configFile."fish/fish_plugins".text = ''
     jorgebucaran/autopair.fish
     jorgebucaran/replay.fish
     jorgebucaran/getopts.fish
diff --git a/home/helix.nix b/home/helix.nix
new file mode 100644
index 0000000..a8d58e3
--- /dev/null
+++ b/home/helix.nix
@@ -0,0 +1,30 @@
+{ pkgs, ... }:
+
+{
+  programs.helix.enable = true;
+
+  programs.helix.package = pkgs.helix-flake;
+
+  programs.helix.settings = {
+    editor.bufferline = "multiple";
+    editor.color-modes = true;
+    editor.indent-guides.render = true;
+    editor.indent-guides.skip-levels = 1;
+    editor.line-number = "relative";
+    editor.whitespace.render = {
+      space = "none";
+      tab = "all";
+      newline = "all";
+    };
+  };
+
+  programs.helix.extras.autoTheme = {
+    enable = true;
+    light = "rose_pine_dawn";
+    dark = "rose_pine";
+  };
+
+  home.sessionVariables = {
+    EDITOR = "hx";
+  };
+}
diff --git a/home/programs.nix b/home/programs.nix
index 3982c0c..9ae78b8 100644
--- a/home/programs.nix
+++ b/home/programs.nix
@@ -5,9 +5,7 @@ let
 in
 {
   # Programs + packages with configuration --------------------------------------------------------------- {{{
-  home.sessionVariables = {
-    EDITOR = "hx";
-  } // lib.optionalAttrs pkgs.stdenv.isDarwin {
+  home.sessionVariables = lib.optionalAttrs pkgs.stdenv.isDarwin {
     SSH_AUTH_SOCK = secretiveAuthSocket;
   };
   programs = {
@@ -26,14 +24,6 @@ in
       enable = true;
       nix-direnv.enable = true;
     };
-    helix = {
-      enable = true;
-      package = pkgs.helix-flake;
-      settings = {
-        theme = "rose_pine";
-        editor.indent-guides.render = true;
-      };
-    };
     nix-index = {
       enable = true;
       enableFishIntegration = true;
diff --git a/modules/home/programs/helix/extras.nix b/modules/home/programs/helix/extras.nix
new file mode 100644
index 0000000..aef2888
--- /dev/null
+++ b/modules/home/programs/helix/extras.nix
@@ -0,0 +1,48 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.programs.helix;
+  inherit (cfg) extras;
+  tomlFormat = pkgs.formats.toml { };
+  inherit (lib) mkIf mkEnableOption mkOption types;
+in
+{
+  options.programs.helix.extras = {
+    autoTheme.enable = mkEnableOption "Automatically switch helix theme with night mode";
+
+    autoTheme.light = mkOption {
+      type = types.str;
+      description = "Light mode theme";
+    };
+
+    autoTheme.dark = mkOption {
+      type = types.str;
+      description = "Dark mode theme";
+    };
+  };
+
+  config = mkIf (cfg.enable && extras.autoTheme.enable) {
+    xdg.configFile = {
+      "helix/light.toml".source = tomlFormat.generate "helix-autotheme" (cfg.settings // { theme = extras.autoTheme.light; });
+      "helix/dark.toml".source = tomlFormat.generate "helix-autotheme" (cfg.settings // { theme = extras.autoTheme.dark; });
+    };
+
+    programs.fish.shellAbbrs = {
+      hxl = "${cfg.package} --config ${config.xdg.configHome}/helix/light.toml";
+      hxd = "${cfg.package} --config ${config.xdg.configHome}/helix/dark.toml";
+    };
+
+    programs.fish.functions = {
+      hx = {
+        description = "Helix invocation wrapper to automatically select the right theme";
+        body = ''
+          if is-dark-mode
+            hxd $argv
+          else
+            hxl $argv
+          end
+        '';
+      };
+    };
+  };
+}
diff --git a/modules/home/programs/kakoune/extras.nix b/modules/home/programs/kakoune/extras.nix
index 7893b18..f7f334d 100644
--- a/modules/home/programs/kakoune/extras.nix
+++ b/modules/home/programs/kakoune/extras.nix
@@ -1,5 +1,3 @@
-# TODO: migrate this to helix
-
 { config, lib, pkgs, ... }:
 
 with lib;