feat: nest all config in vim.g

doc/cp.txt

@@ -64,62 +64,33 @@ Navigation Commands ~
 
 CONFIGURATION						*cp-config*
 
-cp.nvim is automatically lazy-loaded - no config/setup is required.
+cp.nvim works out of the box. No setup required.
 
-Provide extra options via a setup() function with your package manager. For
-example, with lazy.nvim (https://github.com/folke/lazy.nvim):
-
-    {
-      'barrett-ruth/cp.nvim',
-      config = function()
-        local ls = require('luasnip')
-        local s = ls.snippet
-
-        require('cp').setup({
-          debug = false,
-          contests = {
-            default = {
-              cpp_version = 20,
-              compile_flags = { "-O2", "-DLOCAL", "-Wall", "-Wextra" },
-              debug_flags = { "-g3", "-fsanitize=address,undefined", "-DLOCAL" },
-              timeout_ms = 2000,
-            },
-            atcoder = {
-              cpp_version = 23,
-            },
+Optional: >
+    vim.g.cp = {
+      config = {
+        debug = false,
+        contests = {
+          default = {
+            cpp_version = 20,
+            compile_flags = { "-O2", "-DLOCAL", "-Wall", "-Wextra" },
+            debug_flags = { "-g3", "-fsanitize=address,undefined", "-DLOCAL" },
+            timeout_ms = 2000,
           },
-          snippets = {
-            cses = {
-              s("cses", "#include <iostream>\nusing namespace std;\n\nint main() {\n\t$0\n}")
-            },
-          },
-          hooks = {
-            before_run = function(problem_id)
-              vim.cmd.w()
-              vim.lsp.buf.format()
-            end,
-            before_debug = function(problem_id)
-              ...
-            end
-          },
-          tile = function(source_buf, input_buf, output_buf)
-            vim.api.nvim_set_current_buf(source_buf)
-            vim.cmd.vsplit()
-            vim.api.nvim_set_current_buf(output_buf)
-            vim.cmd.vsplit()
-            vim.api.nvim_set_current_buf(input_buf)
-            vim.cmd('wincmd h | wincmd h')
-          end,
-          filename = function(contest, problem_id, problem_letter)
-            if contest == "atcoder" then
-              return problem_id:lower() .. (problem_letter or "") .. ".cpp"
-            else
-              return problem_id:lower() .. (problem_letter or "") .. ".cc"
-            end
-          end,
-        })
-      end
+          atcoder = { cpp_version = 23 },
+        },
+        hooks = {
+          before_run = function(problem_id) vim.cmd.w() end,
+        },
+        tile = function(source_buf, input_buf, output_buf)
+          -- custom window layout
+        end,
+        filename = function(contest, problem_id, problem_letter)
+          -- custom filename generation
+        end,
+      }
     }
+<
 
 Configuration options:
 

lua/cp/init.lua

@@ -263,21 +263,15 @@ local function navigate_problem(delta)
 	end
 end
 
-local initialized = false
-
-function M.is_initialized()
-	return initialized
-end
-
-function M.setup(user_config)
-	if initialized and not user_config then
+local function ensure_initialized()
+	if config then
 		return
 	end
 
-	config = config_module.setup(user_config)
+	vim.g.cp = vim.g.cp or {}
+	config = config_module.setup(vim.g.cp.config)
 	logger.set_config(config)
 	snippets.setup(config)
-	initialized = true
 end
 
 local function parse_command(args)
@@ -311,6 +305,7 @@ local function parse_command(args)
 end
 
 function M.handle_command(opts)
+	ensure_initialized()
 	local cmd = parse_command(opts.fargs)
 
 	if cmd.type == "error" then
@@ -374,4 +369,8 @@ function M.handle_command(opts)
 	end
 end
 
+function M.is_initialized()
+	return config ~= nil
+end
+
 return M

plugin/cp.lua

@@ -8,9 +8,6 @@ local actions = { "run", "debug", "diff", "next", "prev" }
 
 vim.api.nvim_create_user_command("CP", function(opts)
 	local cp = require("cp")
-	if not cp.is_initialized() then
-		cp.setup()
-	end
 	cp.handle_command(opts)
 end, {
 	nargs = "*",