From 65fbf1cdff316090f404bb65f8c8a54a00551650 Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Sat, 20 May 2017 13:34:53 +0100
Subject: [PATCH] #563 Use a configurable list of directories for detecting
 virtualenv paths instead.

---
 autoload/ale/python.vim | 19 +++++++++++++++----
 doc/ale-python.txt      | 15 +++++++++++++++
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/autoload/ale/python.vim b/autoload/ale/python.vim
index 2c0c9d8..067b08b 100644
--- a/autoload/ale/python.vim
+++ b/autoload/ale/python.vim
@@ -1,6 +1,15 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Functions for integrating with Python linters.
 
+let g:ale_virtualenv_dir_names = get(g:, 'ale_virtualenv_dir_names', [
+\   '.env',
+\   'env',
+\   've',
+\   've-py3',
+\   'virtualenv',
+\])
+
+
 " Given a buffer number, find the project root directory for Python.
 " The root directory is defined as the first directory found while searching
 " upwards through paths, including the current directory, until a path
@@ -18,11 +27,13 @@ endfunction
 " Given a buffer number, find a virtualenv path for Python.
 function! ale#python#FindVirtualenv(buffer) abort
     for l:path in ale#path#Upwards(expand('#' . a:buffer . ':p:h'))
-        let l:matches = globpath(l:path, '*/bin/activate', 0, 1)
+        for l:dirname in ale#Var(a:buffer, 'virtualenv_dir_names')
+            let l:venv_dir = l:path . '/' . l:dirname
 
-        if !empty(l:matches)
-            return fnamemodify(l:matches[-1], ':h:h')
-        endif
+            if filereadable(l:venv_dir . '/bin/activate')
+                return l:venv_dir
+            endif
+        endfor
     endfor
 
     return ''
diff --git a/doc/ale-python.txt b/doc/ale-python.txt
index 2964671..0a8b708 100644
--- a/doc/ale-python.txt
+++ b/doc/ale-python.txt
@@ -2,6 +2,21 @@
 ALE Python Integration                                     *ale-python-options*
 
 
+-------------------------------------------------------------------------------
+Global Options
+
+g:ale_virtualenv_dir_names                         *g:ale_virtualenv_dir_names*
+                                                   *b:ale_virtualenv_dir_names*
+
+  Type: |List|
+  Default: `['.env', 'env', 've', 've-py3', 'virtualenv']`
+
+  A list of directory names to be used when searching upwards from Python
+  files to discover virtulenv directories with. For directory named `'foo'`,
+  ALE will search for `'foo/bin/activate'` in all directories on and above
+  the directory containing the Python file to find virtualenv paths.
+
+
 -------------------------------------------------------------------------------
 flake8                                                      *ale-python-flake8*