Use pipenv isort executable when python_auto_pipenv = 1

autoload/ale/fixers/isort.vim

@@ -5,14 +5,23 @@ call ale#Set('python_isort_executable', 'isort')
 call ale#Set('python_isort_options', '')
 call ale#Set('python_isort_use_global', get(g:, 'ale_use_global_executables', 0))
 
+function! ale#fixers#isort#GetExecutable(buffer) abort
+    if (ale#Var(a:buffer, 'python_auto_pipenv') || ale#Var(a:buffer, 'python_isort_auto_pipenv'))
+    \ && ale#python#PipenvPresent(a:buffer)
+        return 'pipenv'
+    endif
+
+    return ale#python#FindExecutable(a:buffer, 'python_isort', ['isort'])
+endfunction
+
 function! ale#fixers#isort#Fix(buffer) abort
     let l:options = ale#Var(a:buffer, 'python_isort_options')
 
-    let l:executable = ale#python#FindExecutable(
-    \   a:buffer,
-    \   'python_isort',
-    \   ['isort'],
-    \)
+    let l:executable = ale#fixers#isort#GetExecutable(a:buffer)
+
+    let l:exec_args = l:executable =~? 'pipenv$'
+    \   ? ' run isort'
+    \   : ''
 
     if !executable(l:executable)
         return 0
@@ -20,6 +29,7 @@ function! ale#fixers#isort#Fix(buffer) abort
 
     return {
     \   'command': ale#path#BufferCdString(a:buffer)
-    \   .   ale#Escape(l:executable) . (!empty(l:options) ? ' ' . l:options : '') . ' -',
+    \   . ale#Escape(l:executable) . l:exec_args
+    \   . (!empty(l:options) ? ' ' . l:options : '') . ' -',
     \}
 endfunction