I broke up with neovim....vim is my best friend now

dot_vim/plugged/ale/autoload/ale/fixers/hindent.vim

@@ -0,0 +1,20 @@
+" Author: AlexeiDrake <drake.alexei@gmail.com>
+" Description: Integration of hindent formatting with ALE.
+"
+call ale#Set('haskell_hindent_executable', 'hindent')
+
+function! ale#fixers#hindent#GetExecutable(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'haskell_hindent_executable')
+
+    return ale#handlers#haskell_stack#EscapeExecutable(l:executable, 'hindent')
+endfunction
+
+function! ale#fixers#hindent#Fix(buffer) abort
+    let l:executable = ale#fixers#hindent#GetExecutable(a:buffer)
+
+    return {
+    \   'command': l:executable
+    \       . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction