refactor: Remove top-level modules. (#445)

Moving all of the module loads into their respective functions.

Author: kylechui

lua/nvim-surround/buffer.lua

@@ -1,5 +1,3 @@
-local config = require("nvim-surround.config")
-
 local M = {}
 
 M.namespace = {
@@ -34,6 +32,7 @@ end
 -- Move the cursor to a location in the buffer, depending on the `move_cursor` setting.
 ---@param pos { first_pos: position, sticky_pos: position, old_pos: position } Various positions in the buffer.
 M.restore_curpos = function(pos)
+    local config = require("nvim-surround.config")
     if config.get_opts().move_cursor == "begin" then
         M.set_curpos(pos.first_pos)
     elseif config.get_opts().move_cursor == "sticky" then

lua/nvim-surround/motions.lua

@@ -1,6 +1,3 @@
-local buffer = require("nvim-surround.buffer")
-local config = require("nvim-surround.config")
-
 local M = {}
 
 -- Determines whether the input character is a quote character.
@@ -16,6 +13,8 @@ end
 ---@return selection|nil @The selection that represents the text-object.
 ---@nodiscard
 M.get_selection = function(motion)
+    local buffer = require("nvim-surround.buffer")
+    local config = require("nvim-surround.config")
     local char = config.get_alias(motion:sub(2, 2))
     local curpos = buffer.get_curpos()
 

lua/nvim-surround/patterns.lua

@@ -1,5 +1,3 @@
-local buffer = require("nvim-surround.buffer")
-
 local M = {}
 
 -- Gets the EOL character for the current buffer, based on the file format.
@@ -45,6 +43,7 @@ end
 ---@return selection @The adjusted selection, handling multi-byte characters.
 ---@nodiscard
 M.adjust_selection = function(selection)
+    local buffer = require("nvim-surround.buffer")
     selection.first_pos = buffer.get_first_byte(selection.first_pos)
     selection.last_pos = buffer.get_last_byte(selection.last_pos)
     return selection
@@ -55,6 +54,7 @@ end
 ---@return selection|nil @The closest selection matching the pattern, if any.
 ---@nodiscard
 M.get_selection = function(find)
+    local buffer = require("nvim-surround.buffer")
     -- Get the current cursor position, buffer contents
     local curpos = buffer.get_curpos()
     local buffer_text = table.concat(buffer.get_lines(1, -1), end_of_line())
@@ -130,6 +130,7 @@ end
 ---@return selections|nil @The selections for the left and right delimiters.
 ---@nodiscard
 M.get_selections = function(selection, pattern)
+    local buffer = require("nvim-surround.buffer")
     local offset = M.pos_to_index(selection.first_pos)
     local str = table.concat(buffer.get_text(selection), end_of_line())
     -- Get the surrounding pair, and the start/end indices

lua/nvim-surround/utils.lua

@@ -1,7 +1,3 @@
-local buffer = require("nvim-surround.buffer")
-local config = require("nvim-surround.config")
-local functional = require("nvim-surround.functional")
-
 local M = {}
 
 -- Do nothing.
@@ -42,12 +38,15 @@ end
 ---@return selections|nil @A table containing the start and end positions of the delimiters.
 ---@nodiscard
 M.get_nearest_selections = function(char, action)
+    local config = require("nvim-surround.config")
+    local functional = require("nvim-surround.functional")
     char = config.get_alias(char)
     local chars = functional.to_list(config.get_opts().aliases[char] or char)
     if not chars then
         return nil
     end
 
+    local buffer = require("nvim-surround.buffer")
     local curpos = buffer.get_curpos()
     local winview = vim.fn.winsaveview()
     local selections_list = {}
@@ -79,6 +78,7 @@ end
 ---@return selections|nil @The best selections from the list.
 ---@nodiscard
 M.filter_selections_list = function(selections_list)
+    local buffer = require("nvim-surround.buffer")
     local curpos = buffer.get_curpos()
     local best_selections
     for _, cur_selections in ipairs(selections_list) do