ale/ale_linters/haskell/hdevtools.vim

" 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', '-g -Wall')

function! ale_linters#haskell#hdevtools#GetExecutable(buffer) abort
    return ale#Var(a:buffer, 'haskell_hdevtools_executable')
endfunction

function! ale_linters#haskell#hdevtools#GetCommand(buffer) abort
    return ale#Escape(ale_linters#haskell#hdevtools#GetExecutable(a:buffer))
        \ . ' check ' . ale#Var(a:buffer, 'haskell_hdevtools_options')
        \ . ' -p %s %t'
endfunction

call ale#linter#Define('haskell', {
\   'name': 'hdevtools',
\   'executable_callback': 'ale_linters#haskell#hdevtools#GetExecutable',
\   'command_callback': 'ale_linters#haskell#hdevtools#GetCommand',
\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
\})