Fix 3941 - add version check to isort fixer (#3942)

autoload/ale/fixers/isort.vim

@@ -21,7 +21,7 @@ function! ale#fixers#isort#GetExecutable(buffer) abort
     return ale#python#FindExecutable(a:buffer, 'python_isort', ['isort'])
 endfunction
 
-function! ale#fixers#isort#Fix(buffer) abort
+function! ale#fixers#isort#GetCmd(buffer) abort
     let l:executable = ale#fixers#isort#GetExecutable(a:buffer)
     let l:cmd = [ale#Escape(l:executable)]
 
@@ -29,7 +29,20 @@ function! ale#fixers#isort#Fix(buffer) abort
         call extend(l:cmd, ['run', 'isort'])
     endif
 
-    call add(l:cmd, '--filename %s')
+    return join(l:cmd, ' ')
+endfunction
+
+function! ale#fixers#isort#FixForVersion(buffer, version) abort
+    let l:executable = ale#fixers#isort#GetExecutable(a:buffer)
+    let l:cmd = [ale#Escape(l:executable)]
+
+    if l:executable =~? 'pipenv\|poetry$'
+        call extend(l:cmd, ['run', 'isort'])
+    endif
+
+    if ale#semver#GTE(a:version, [5, 7, 0])
+        call add(l:cmd, '--filename %s')
+    endif
 
     let l:options = ale#Var(a:buffer, 'python_isort_options')
 
@@ -41,6 +54,18 @@ function! ale#fixers#isort#Fix(buffer) abort
 
     return {
     \   'cwd': '%s:h',
-    \   'command': join(l:cmd, ' ')
+    \   'command': join(l:cmd, ' '),
     \}
 endfunction
+
+function! ale#fixers#isort#Fix(buffer) abort
+    let l:executable = ale#fixers#isort#GetExecutable(a:buffer)
+    let l:command = ale#fixers#isort#GetCmd(a:buffer) . ale#Pad('--version')
+
+    return ale#semver#RunWithVersionCheck(
+    \     a:buffer,
+    \     l:executable,
+    \     l:command,
+    \     function('ale#fixers#isort#FixForVersion'),
+    \)
+endfunction

test/fixers/test_isort_fixer_callback.vader

@@ -11,45 +11,60 @@ After:
 
 Execute(The isort callback should return the correct default values):
   silent execute 'file ' . fnameescape(g:dir . '/../test-files/python/with_virtualenv/subdir/foo/bar.py')
-  AssertEqual
+
+  " --filename option exists only after 5.7.0
+  GivenCommandOutput ['VERSION 5.7.0']
+  AssertFixer
   \ {
   \   'cwd': '%s:h',
   \   'command': ale#Escape(ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir . '/isort')) . ' --filename %s' . ' -',
-  \ },
+  \ }
-  \ ale#fixers#isort#Fix(bufnr(''))
 
 Execute(The isort callback should respect custom options):
   let g:ale_python_isort_options = '--multi-line=3 --trailing-comma'
 
   silent execute 'file ' . fnameescape(g:dir . '/../test-files/python/with_virtualenv/subdir/foo/bar.py')
-  AssertEqual
+
+  " --filename option exists only after 5.7.0
+  GivenCommandOutput ['VERSION 5.7.0']
+  AssertFixer
   \ {
   \   'cwd': '%s:h',
   \   'command': ale#Escape(ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir . '/isort'))
   \     . ' --filename %s' . ' --multi-line=3 --trailing-comma -',
-  \ },
+  \ }
-  \ ale#fixers#isort#Fix(bufnr(''))
 
 Execute(Pipenv is detected when python_isort_auto_pipenv is set):
   let g:ale_python_isort_auto_pipenv = 1
 
   call ale#test#SetFilename('../test-files/python/pipenv/whatever.py')
 
-  AssertEqual
+  GivenCommandOutput ['VERSION 5.7.0']
+  AssertFixer
   \ {
   \   'cwd': '%s:h',
   \   'command': ale#Escape('pipenv') . ' run isort' . ' --filename %s' . ' -'
-  \ },
+  \ }
-  \ ale#fixers#isort#Fix(bufnr(''))
 
 Execute(Poetry is detected when python_isort_auto_poetry is set):
   let g:ale_python_isort_auto_poetry = 1
 
   call ale#test#SetFilename('../test-files/python/poetry/whatever.py')
 
-  AssertEqual
+  GivenCommandOutput ['VERSION 5.7.0']
+  AssertFixer
   \ {
   \   'cwd': '%s:h',
   \   'command': ale#Escape('poetry') . ' run isort' . ' --filename %s' . ' -'
-  \ },
+  \ }
-  \ ale#fixers#isort#Fix(bufnr(''))
+
+Execute(The isort callback should not use --filename for older versions):
+  silent execute 'file ' . fnameescape(g:dir . '/../test-files/python/with_virtualenv/subdir/foo/bar.py')
+
+  " --filename option exists only after 5.7.0
+  GivenCommandOutput ['VERSION 5.6.0']
+  AssertFixer
+  \ {
+  \   'cwd': '%s:h',
+  \   'command': ale#Escape(ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir . '/isort')) . ' -',
+  \ }