Added option to override config with local file.

Author: sebu06

docs/sessions.md

@@ -39,3 +39,5 @@ local session = {
 ```
 
 per project.
+
+Alternatively, cmake-tools will search for a file ".cmake-tools.lua" in the current working directory. If it is found, the configuration in this file will be used. If no configuration is found in the current working directory, it will continue looking in the parent directory. If no config can be found, it will use the sessions mentioned above.

lua/cmake-tools/session.lua

@@ -1,6 +1,22 @@
 local osys = require("cmake-tools.osys")
 local utils = require("cmake-tools.utils")
 
+local function find_file_in_dir_or_parent(dir, fname)
+  local path = dir .. "/" .. fname
+  local file = io.open(path, "r")
+  if file then
+    file:close()
+    return path
+  end
+
+  local parentDir = dir:match("(.+)/[^/]+$")
+  if not parentDir then
+    return nil
+  end
+
+  return find_file_in_dir_or_parent(parentDir, fname)
+end
+
 local session = {
   dir = {
     unix = vim.fn.expand("~") .. "/.cache/cmake_tools_nvim/",
@@ -24,6 +40,12 @@ local function get_cache_path()
   end
 end
 
+---@param cwd string neovim working directory
+---@return string
+local function get_local_config_path(cwd)
+  return find_file_in_dir_or_parent(cwd, ".cmake-tools.lua")
+end
+
 ---@param cwd string neovim working directory
 ---@return string
 local function get_current_path(cwd)
@@ -42,9 +64,12 @@ end
 
 ---@param cwd string neovim working directory
 local function init_session(cwd)
-  init_cache()
+  local path = get_local_config_path(cwd)
+  if not path then
+    init_cache()
+    path = get_current_path(cwd)
+  end
 
-  local path = get_current_path(cwd)
   if not utils.file_exists(path) then
     local file = io.open(path, "w")
     if file then
@@ -56,7 +81,10 @@ end
 ---@param cwd string neovim working directory (used as cache key)
 ---@return SerializedConfig raw session data, or empty table if none exists
 function session.load(cwd)
-  local path = get_current_path(cwd)
+  local path = get_local_config_path(cwd)
+  if not path then
+    path = get_current_path(cwd)
+  end
 
   if utils.file_exists(path) then
     local config = dofile(path)
@@ -92,9 +120,12 @@ end
 ---@param cwd string neovim working directory (used as cache key)
 ---@param config Config current config to persist
 function session.save(cwd, config)
-  init_session(cwd)
+  local path = get_local_config_path()
+  if not path then
+    init_session(cwd)
+    path = get_current_path(cwd)
+  end
 
-  local path = get_current_path(cwd)
   local file = io.open(path, "w")
 
   ---@class SerializedConfig