feat: add option to ignore a project root based on file existence (#19)

* Add option to ignore project roots based on files found

* Add explanation of root_ignore_files to readme

Author: V13Axel

README.md

@@ -108,6 +108,16 @@ require("neotest-phpunit")({
 })
 ```
 
+If there are projects you don't want discovered, you can instead set `root_ignore_files` to ignore any matching projects. 
+
+For example, if your project uses Pest and the appropriate [neotest adapter](https://github.com/V13Axel/neotest-pest), you'll need to set:
+
+```lua
+require("neotest-phpunit")({
+    root_ignore_files = { "tests/Pest.php" }
+})
+```
+
 ### Filtering directories
 
 By default, the adapter will search test files in all dirs in the root with the exception of `node_modules` and `.git`. You can change this with:

lua/neotest-phpunit/config.lua

@@ -8,6 +8,10 @@ M.get_env = function()
   return {}
 end
 
+M.get_root_ignore_files = function()
+  return {}
+end
+
 M.get_root_files = function()
   return { "composer.json", "phpunit.xml", ".gitignore" }
 end

lua/neotest-phpunit/init.lua

@@ -59,6 +59,11 @@ local NeotestAdapter = { name = "neotest-phpunit" }
 function NeotestAdapter.root(dir)
   local result = nil
 
+  for _, root_ignore_file in ipairs(config.get_root_ignore_files()) do
+    result = lib.files.match_root_pattern(root_ignore_file)(dir)
+    if result then return nil end
+  end
+
   for _, root_file in ipairs(config.get_root_files()) do
     result = lib.files.match_root_pattern(root_file)(dir)
     if result then break end
@@ -198,6 +203,13 @@ setmetatable(NeotestAdapter, {
         return opts.phpunit_cmd
       end
     end
+    if is_callable(opts.root_ignore_files) then
+      config.get_root_ignore_files = opts.root_ignore_files
+    elseif opts.root_ignore_files then
+      config.get_root_ignore_files = function()
+        return opts.root_ignore_files
+      end
+    end
     if is_callable(opts.root_files) then
       config.get_root_files = opts.root_files
     elseif opts.root_files then