feat(loader): automatically lazy-load colorschemes

Author: folke

README.md

@@ -22,6 +22,7 @@
 - 🔎 Automatically check for updates
 - 📋 Commit, branch, tag, version, and full [Semver](https://devhints.io/semver) support
 - 📈 Statusline component to see the number of pending updates
+- 🎨 Automatically lazy-loads colorschemes
 
 ## ⚡️ Requirements
 
@@ -112,6 +113,9 @@ module of plugin `A`, then plugin `A` will be loaded on demand as expected.
 If you don't want this behavior for a certain plugin, you can specify that with `module=false`.
 You can then manually load the plugin with `:Lazy load foobar.nvim`.
 
+Colorscheme plugins can be configured with `lazy=true`. The plugin will automagically load
+when doing `colorscheme foobar`.
+
 You can configure **lazy.nvim** to lazy-load all plugins by default with `config.defaults.lazy = true`.
 
 Additionally, you can also lazy-load on **events**, **commands**,

lua/lazy/core/loader.lua

@@ -37,6 +37,12 @@ function M.setup()
     M.disabled_rtp_plugins[file] = true
   end
 
+  vim.api.nvim_create_autocmd("ColorSchemePre", {
+    callback = function(event)
+      M.colorscheme(event.match)
+    end,
+  })
+
   -- autoload opt plugins
   table.insert(package.loaders, M.autoload)
 end
@@ -191,6 +197,22 @@ function M.source(path)
   Util.track()
 end
 
+function M.colorscheme(name)
+  if vim.tbl_contains(vim.fn.getcompletion("", "color"), name) then
+    return
+  end
+  for _, plugin in pairs(Config.plugins) do
+    if not plugin._.loaded then
+      for _, ext in ipairs({ "lua", "vim" }) do
+        local path = plugin.dir .. "/colors/" .. name .. "." .. ext
+        if vim.loop.fs_stat(path) then
+          return M.load(plugin, { colorscheme = name })
+        end
+      end
+    end
+  end
+end
+
 -- This loader is added as the very last one.
 -- This only hits when the modname is not cached and
 -- even then only once per plugin. So pretty much never.