neovim: use bas16 manually

packages/vim.nix

@@ -4,6 +4,10 @@
   fetchFromGitHub,
   vimUtils,
   niveumPackages,
+  writeText,
+  stylixColors ? null,
+  colorscheme ? null,
+  lib,
   ...
 }: (neovim.override {
   configure = {
@@ -12,9 +16,21 @@
       source ${../lib/vim/init.vim}
       let g:snippet_directory = '${vimPlugins.friendly-snippets}'
       luafile ${../lib/vim/init.lua}
+    '' + lib.optionalString (stylixColors != null) (with stylixColors.withHashtag; ''
+      luafile ${writeText "colors.lua" ''
+        require('base16-colorscheme').setup({
+          base00 = '${base00}', base01 = '${base01}', base02 = '${base02}', base03 = '${base03}',
+          base04 = '${base04}', base05 = '${base05}', base06 = '${base06}', base07 = '${base07}',
+          base08 = '${base08}', base09 = '${base09}', base0A = '${base0A}', base0B = '${base0B}',
+          base0C = '${base0C}', base0D = '${base0D}', base0E = '${base0E}', base0F = '${base0F}'
+        })
+      ''}
+    '') + lib.optionalString (colorscheme != null) ''
+      colorscheme ${colorscheme}
     '';
     packages.nvim = with vimPlugins; {
       start = [
+        base16-nvim
         nvim-cmp
         cmp-buffer
         cmp-path