feat!: lazy auto setup

Author: seblyng

lua/crates/config/init.lua

@@ -1993,35 +1993,26 @@ local function setup_neoconf(config)
 end
 
 ---@param schema table<string,SchemaElement>|SchemaElement[]
----@param user_config table<string,any>
 ---@return table
-local function build_config(schema, user_config)
+local function build_config(schema)
     ---@type table<string,any>
     local config = {}
 
     for _, elem in ipairs(schema) do
         local key = elem.name
-        local user_value = user_config[key]
-        local value_type = type(user_value)
 
         if elem.type.config_type == "section" then
-            if value_type == "table" then
-                config[key] = build_config(elem.fields, user_value)
-            else
-                config[key] = build_config(elem.fields, {})
-            end
+            config[key] = build_config(elem.fields)
         else
-            if matches_type(value_type, elem.type) then
-                config[key] = user_value
-            else
-                config[key] = elem.default
-            end
+            config[key] = elem.default
         end
     end
 
     return config
 end
 
+local current_config = build_config(M.schema)
+
 ---comment
 ---@param user_config table<string,any>?
 ---@return Config
@@ -2035,11 +2026,11 @@ function M.build(user_config)
 
     handle_deprecated({}, M.schema, user_config, user_config)
     validate_schema({}, M.schema, user_config)
-    local config = build_config(M.schema, user_config)
-    if config.neoconf.enabled then
-        return setup_neoconf(config)
+    current_config = vim.tbl_deep_extend("force", current_config, user_config)
+    if current_config.neoconf.enabled then
+        return setup_neoconf(current_config)
     else
-        return config
+        return current_config
     end
 end
 

lua/crates/init.lua

@@ -1,12 +1,8 @@
 local actions = require("crates.actions")
 local async = require("crates.async")
-local command = require("crates.command")
-local config = require("crates.config")
 local core = require("crates.core")
-local highlight = require("crates.highlight")
 local popup = require("crates.popup")
 local state = require("crates.state")
-local util = require("crates.util")
 
 local function attach()
     if state.cfg.completion.cmp.enabled then
@@ -18,15 +14,12 @@ local function attach()
     end
 
     core.update()
-    state.cfg.on_attach(util.current_buf())
+    state.cfg.on_attach(require("crates.util").current_buf())
 end
 
 ---@param cfg crates.UserConfig
 local function setup(cfg)
-    state.cfg = config.build(cfg)
-
-    command.register()
-    highlight.define()
+    state.cfg = require("crates.config").build(cfg)
 
     ---@type integer
     local group = vim.api.nvim_create_augroup("Crates", {})

plugin/crates.lua

@@ -0,0 +1,10 @@
+require("crates.command").register()
+require("crates.highlight").define()
+
+vim.api.nvim_create_autocmd("BufRead", {
+    pattern = "Cargo.toml",
+    once = true,
+    callback = function()
+        require("crates").setup({})
+    end,
+})