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 findFileInDirOrParent(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 findFileInDirOrParent(parentDir, fname)
+end
+
 local session = {
   dir = {
     unix = vim.fn.expand("~") .. "/.cache/cmake_tools_nvim/",
@@ -25,6 +41,10 @@ end
 
 local function get_current_path()
   local current_path = vim.loop.cwd()
+  local local_config = findFileInDirOrParent(current_path, ".cmake-tools.lua")
+  if local_config then
+    return local_config
+  end
   local clean_path = current_path:gsub("/", "")
   clean_path = clean_path:gsub("\\", "")
   clean_path = clean_path:gsub(":", "")