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" Author: Harrison Bachrach - https://github.com/HarrisonB
" Description: Ameba, a linter for crystal files
call ale#Set('crystal_ameba_executable', 'bin/ameba')
function! ale_linters#crystal#ameba#GetCommand(buffer) abort
let l:executable = ale#Var(a:buffer, 'crystal_ameba_executable')
return ale#Escape(l:executable)
\ . ' --format json '
\ . ale#Escape(expand('#' . a:buffer . ':p'))
endfunction
" Handle output from ameba
function! ale_linters#crystal#ameba#HandleAmebaOutput(buffer, lines) abort
if len(a:lines) == 0
return []
endif
let l:errors = ale#util#FuzzyJSONDecode(a:lines[0], {})
if !has_key(l:errors, 'summary')
\|| l:errors['summary']['issues_count'] == 0
\|| empty(l:errors['sources'])
return []
endif
let l:output = []
for l:error in l:errors['sources'][0]['issues']
let l:start_col = str2nr(l:error['location']['column'])
let l:end_col = str2nr(l:error['end_location']['column'])
if !l:end_col
let l:end_col = l:start_col + 1
endif
call add(l:output, {
\ 'lnum': str2nr(l:error['location']['line']),
\ 'col': l:start_col,
\ 'end_col': l:end_col,
\ 'code': l:error['rule_name'],
\ 'text': l:error['message'],
\ 'type': 'W',
\})
endfor
return l:output
endfunction
call ale#linter#Define('crystal', {
\ 'name': 'ameba',
\ 'executable': {b -> ale#Var(b, 'crystal_ameba_executable')},
\ 'command': function('ale_linters#crystal#ameba#GetCommand'),
\ 'callback': 'ale_linters#crystal#ameba#HandleAmebaOutput',
\ 'lint_file': 1,
\})
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