Updated plugins

sources_non_forked/ale/ale_linters/python/flake8.vim

@@ -1,14 +1,15 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: flake8 for python files
 
-let g:ale_python_flake8_executable =
-\   get(g:, 'ale_python_flake8_executable', 'flake8')
-
+" remove in 2.0
 " Support an old setting as a fallback.
+let s:deprecation_warning_echoed = 0
 let s:default_options = get(g:, 'ale_python_flake8_args', '')
-let g:ale_python_flake8_options =
-\   get(g:, 'ale_python_flake8_options', s:default_options)
-let g:ale_python_flake8_use_global = get(g:, 'ale_python_flake8_use_global', 0)
+
+call ale#Set('python_flake8_executable', 'flake8')
+call ale#Set('python_flake8_options', s:default_options)
+call ale#Set('python_flake8_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('python_flake8_change_directory', 1)
 
 function! s:UsingModule(buffer) abort
     return ale#Var(a:buffer, 'python_flake8_options') =~# ' *-m flake8'
@@ -39,9 +40,22 @@ function! ale_linters#python#flake8#VersionCheck(buffer) abort
 endfunction
 
 function! ale_linters#python#flake8#GetCommand(buffer, version_output) abort
+    " remove in 2.0
+    if exists('g:ale_python_flake8_args') && !s:deprecation_warning_echoed
+        execute 'echom ''Rename your g:ale_python_flake8_args setting to g:ale_python_flake8_options instead. Support for this will removed in ALE 2.0.'''
+        let s:deprecation_warning_echoed = 1
+    endif
+
+    let l:cd_string = ale#Var(a:buffer, 'python_flake8_change_directory')
+    \   ? ale#path#BufferCdString(a:buffer)
+    \   : ''
     let l:executable = ale_linters#python#flake8#GetExecutable(a:buffer)
     let l:version = ale#semver#GetVersion(l:executable, a:version_output)
 
+    let l:exec_args = l:executable =~? 'pipenv$'
+    \   ? ' run flake8'
+    \   : ''
+
     " Only include the --stdin-display-name argument if we can parse the
     " flake8 version, and it is recent enough to support it.
     let l:display_name_args = ale#semver#GTE(l:version, [3, 0, 0])
@@ -50,7 +64,8 @@ function! ale_linters#python#flake8#GetCommand(buffer, version_output) abort
 
     let l:options = ale#Var(a:buffer, 'python_flake8_options')
 
-    return ale#Escape(l:executable)
+    return l:cd_string
+    \   . ale#Escape(l:executable) . l:exec_args
     \   . (!empty(l:options) ? ' ' . l:options : '')
     \   . ' --format=default'
     \   . l:display_name_args . ' -'