Merge pull request #2502 from ericvw/flake8-config

Change Python project root dir detection for flake8 configuration

autoload/ale/python.vim

@@ -25,7 +25,7 @@ function! ale#python#FindProjectRootIni(buffer) abort
         \|| filereadable(l:path . '/tox.ini')
         \|| filereadable(l:path . '/mypy.ini')
         \|| filereadable(l:path . '/pycodestyle.cfg')
-        \|| filereadable(l:path . '/flake8.cfg')
+        \|| filereadable(l:path . '/.flake8')
         \|| filereadable(l:path . '/.flake8rc')
         \|| filereadable(l:path . '/pylama.ini')
         \|| filereadable(l:path . '/pylintrc')

doc/ale-python.txt

@@ -29,7 +29,7 @@ ALE will look for configuration files with the following filenames. >
   tox.ini
   mypy.ini
   pycodestyle.cfg
-  flake8.cfg
+  .flake8
   .flake8rc
   pylama.ini
   pylintrc

test/test_python_find_project_root.vader

@@ -0,0 +1,11 @@
+Before:
+  call ale#test#SetDirectory('/testplugin/test')
+
+After:
+  call ale#test#RestoreDirectory()
+
+Execute(Detect root of Python project with .flake8 correctly):
+  call ale#test#SetFilename('python-test-files/python-package-project/package-name/module.py')
+  AssertEqual
+  \ ale#path#Simplify(g:dir . '/python-test-files/python-package-project'),
+  \ ale#python#FindProjectRoot(bufnr(''))