#729 - Support running Python programs from virtualenv for Windows

ale_linters/python/flake8.vim

@@ -19,16 +19,8 @@ function! s:UsingModule(buffer) abort
 endfunction
 
 function! ale_linters#python#flake8#GetExecutable(buffer) abort
-    if !s:UsingModule(a:buffer) && !ale#Var(a:buffer, 'python_flake8_use_global')
-        let l:virtualenv = ale#python#FindVirtualenv(a:buffer)
-
-        if !empty(l:virtualenv)
-            let l:ve_flake8 = l:virtualenv . '/bin/flake8'
-
-            if executable(l:ve_flake8)
-                return l:ve_flake8
-            endif
-        endif
+    if !s:UsingModule(a:buffer)
+        return ale#python#FindExecutable(a:buffer, 'python_flake8', ['flake8'])
     endif
 
     return ale#Var(a:buffer, 'python_flake8_executable')

ale_linters/python/mypy.vim

@@ -7,7 +7,7 @@ let g:ale_python_mypy_options = get(g:, 'ale_python_mypy_options', '')
 let g:ale_python_mypy_use_global = get(g:, 'ale_python_mypy_use_global', 0)
 
 function! ale_linters#python#mypy#GetExecutable(buffer) abort
-    return ale#python#FindExecutable(a:buffer, 'python_mypy', ['/bin/mypy'])
+    return ale#python#FindExecutable(a:buffer, 'python_mypy', ['mypy'])
 endfunction
 
 function! ale_linters#python#mypy#GetCommand(buffer) abort

ale_linters/python/pylint.vim

@@ -10,19 +10,7 @@ let g:ale_python_pylint_options =
 let g:ale_python_pylint_use_global = get(g:, 'ale_python_pylint_use_global', 0)
 
 function! ale_linters#python#pylint#GetExecutable(buffer) abort
-    if !ale#Var(a:buffer, 'python_pylint_use_global')
-        let l:virtualenv = ale#python#FindVirtualenv(a:buffer)
-
-        if !empty(l:virtualenv)
-            let l:ve_pylint = l:virtualenv . '/bin/pylint'
-
-            if executable(l:ve_pylint)
-                return l:ve_pylint
-            endif
-        endif
-    endif
-
-    return ale#Var(a:buffer, 'python_pylint_executable')
+    return ale#python#FindExecutable(a:buffer, 'python_pylint', ['pylint'])
 endfunction
 
 function! ale_linters#python#pylint#GetCommand(buffer) abort

autoload/ale/fixers/autopep8.vim

@@ -9,7 +9,7 @@ function! ale#fixers#autopep8#Fix(buffer) abort
     let l:executable = ale#python#FindExecutable(
     \   a:buffer,
     \   'python_autopep8',
-    \   ['/bin/autopep8'],
+    \   ['autopep8'],
     \)
 
     if !executable(l:executable)

autoload/ale/fixers/isort.vim

@@ -8,7 +8,7 @@ function! ale#fixers#isort#Fix(buffer) abort
     let l:executable = ale#python#FindExecutable(
     \   a:buffer,
     \   'python_isort',
-    \   ['/bin/isort'],
+    \   ['isort'],
     \)
 
     if !executable(l:executable)

autoload/ale/fixers/yapf.vim

@@ -8,7 +8,7 @@ function! ale#fixers#yapf#Fix(buffer) abort
     let l:executable = ale#python#FindExecutable(
     \   a:buffer,
     \   'python_yapf',
-    \   ['/bin/yapf'],
+    \   ['yapf'],
     \)
 
     if !executable(l:executable)

autoload/ale/python.vim

@@ -1,6 +1,8 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Functions for integrating with Python linters.
 
+" bin is used for Unix virtualenv directories, and Scripts is for Windows.
+let s:bin_dir = has('unix') ? 'bin' : 'Scripts'
 let g:ale_virtualenv_dir_names = get(g:, 'ale_virtualenv_dir_names', [
 \   '.env',
 \   'env',
@@ -29,7 +31,7 @@ function! ale#python#FindVirtualenv(buffer) abort
         for l:dirname in ale#Var(a:buffer, 'virtualenv_dir_names')
             let l:venv_dir = simplify(l:path . '/' . l:dirname)
 
-            if filereadable(l:venv_dir . '/bin/activate')
+            if filereadable(simplify(l:venv_dir . '/' . s:bin_dir . '/activate'))
                 return l:venv_dir
             endif
         endfor
@@ -50,7 +52,7 @@ function! ale#python#FindExecutable(buffer, base_var_name, path_list) abort
 
     if !empty(l:virtualenv)
         for l:path in a:path_list
-            let l:ve_executable = l:virtualenv . l:path
+            let l:ve_executable = simplify(l:virtualenv . '/' . s:bin_dir . '/' . l:path)
 
             if executable(l:ve_executable)
                 return l:ve_executable