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

dot_vim/plugged/ale/ale_linters/haskell/hdevtools.vim

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+" Author: rob-b, Takano Akio <tak@anoak.io>
+" Description: hdevtools for Haskell files
+
+call ale#Set('haskell_hdevtools_executable', 'hdevtools')
+call ale#Set('haskell_hdevtools_options', get(g:, 'hdevtools_options', '-g -Wall'))
+
+function! ale_linters#haskell#hdevtools#GetCommand(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'haskell_hdevtools_executable')
+
+    return ale#handlers#haskell_stack#EscapeExecutable(l:executable, 'hdevtools')
+    \ . ' check' . ale#Pad(ale#Var(a:buffer, 'haskell_hdevtools_options'))
+    \ . ' -p %s %t'
+endfunction
+
+call ale#linter#Define('haskell', {
+\   'name': 'hdevtools',
+\   'executable': {b -> ale#Var(b, 'haskell_hdevtools_executable')},
+\   'command': function('ale_linters#haskell#hdevtools#GetCommand'),
+\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
+\})