Integration of Makefile formatter mbake

[DallynMattis]

I'm trying to integrate the Makefile mbake formatter and validator into ALE to work with Makefiles in Neovim.

I wrote the following custom linter and fixer configuration under ale_linters/make:

" Description: linting using mbake

call ale#linter#Define('make', {
\   'name': 'mbake',
\   'executable': 'mbake',
\   'command': 'mbake validate %s',
\   'callback': 'ale#handlers#unix#HandleAsWarning',
\})

function! FormatMakefile(buffer) abort
    return {
    \   'command': 'mbake format %t',
    \   'read_temporary_file': 1,
    \}
endfunction

execute ale#fix#registry#Add('mbakefmt', 'FormatMakefile', ['lua'], 'mbake for makefiles')

let g:ale_fixers = {
  \ 'makefile': ['mbakefmt']
}

Formatter works but linter does not. Seems to have an issue with the colouring

[nbossard]

Addition information : Here the what we have with ALEInfo : 

(finished - exit code 2) ['/bin/zsh', '-c', '(mbake validate ''/Users/nbossard/PilotageDistri/kibana-8/plugins/transform_vis/Makefile'') < ''/var/folders/xc/s4mnh5rd447gvb_lh8cp5hc80000gn/T/nvim.nbossard/FEEVSe/211/Makefile''']

<<<OUTPUT STARTS>>> ✗ /Users/nbossard/PilotageDistri/kibana-8/plugins/transform_vis/Makefile: Invalid syntax /Users/nbossard/PilotageDistri/kibana-8/plugins/transform_vis/Makefile:91: *** missing separator. Stop. Fatal error: 1 <<<OUTPUT ENDS>>>

We can see that there are additional line returns that breaks the text and consequenely the parser.

Calling from bash directly we got better formatted result :

mbake validate Makefile

✗ Makefile: Invalid syntax Makefile:91: *** missing separator. Stop. Fatal error: 1