correctly handle apply option

lua/lsp-preview/config.lua

@@ -3,10 +3,13 @@ local M = {}
 ---@class Options
 ---Automatically apply code-actions if there is only 1 available.
 ---@field apply boolean
+---Preview all changes per default.
+---@field previe boolean
 ---Configuration provided to vim.diff (see `:h vim.diff()`)
 ---@field diff table
 local default_config = {
 	apply = true,
+	preview = false,
 	diff = {
 		ctxlen = 5,
 	},
@@ -19,6 +22,10 @@ function M.setup(config)
 	user_config = vim.tbl_deep_extend("force", default_config, config)
 end
 
+function M.adhoc_merge(config)
+	return vim.tbl_deep_extend("force", user_config, config)
+end
+
 setmetatable(M, {
 	__index = function(_, key)
 		return user_config[key]

lua/lsp-preview/init.lua

@@ -15,7 +15,7 @@ function M.setup(opts)
 end
 
 M.rename = function(new_name, opts)
-	opts = vim.tbl_deep_extend("force", config, opts or {})
+	opts = config.adhoc_merge(opts or {})
 
 	-- Reset it to the original before every operation in case of a failure.
 	---@diagnostic disable-next-line: duplicate-set-field
@@ -40,7 +40,7 @@ M.rename_preview = function(new_name, opts)
 end
 
 M.code_action = function(opts)
-	opts = vim.tbl_deep_extend("force", config, opts or {})
+	opts = config.adhoc_merge(opts or {})
 
 	-- Reset it to the original before every operation in case of a failure.
 	---@diagnostic disable-next-line: duplicate-set-field
@@ -56,7 +56,6 @@ M.code_action = function(opts)
 	util.apply_workspace_edit = lWorkspaceEdit.make_apply_workspace_edit(apply_workspace_edit)
 
 	-- automatically trigger Telescope when there is only one action
-	opts.apply = true
 	vim.lsp.buf.code_action(opts)
 end