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" Author: w0rp <devw0rp@gmail.com>
" Description: eslint for JavaScript files
let g:ale_javascript_eslint_executable =
\ get(g:, 'ale_javascript_eslint_executable', 'eslint')
let g:ale_javascript_eslint_options =
\ get(g:, 'ale_javascript_eslint_options', '')
let g:ale_javascript_eslint_use_global =
\ get(g:, 'ale_javascript_eslint_use_global', 0)
function! ale_linters#javascript#eslint#GetExecutable(buffer) abort
if g:ale_javascript_eslint_use_global
return g:ale_javascript_eslint_executable
endif
return ale#util#ResolveLocalPath(
\ a:buffer,
\ 'node_modules/.bin/eslint',
\ g:ale_javascript_eslint_executable
\)
endfunction
function! ale_linters#javascript#eslint#GetCommand(buffer) abort
return ale_linters#javascript#eslint#GetExecutable(a:buffer)
\ . ' ' . g:ale_javascript_eslint_options
\ . ' -f unix --stdin --stdin-filename %s'
endfunction
function! ale_linters#javascript#eslint#Handle(buffer, lines) abort
" Matches patterns line the following:
"
" /path/to/some-filename.js:47:14: Missing trailing comma. [Warning/comma-dangle]
" /path/to/some-filename.js:56:41: Missing semicolon. [Error/semi]
let l:pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\) \[\(.\+\)\]$'
" This second pattern matches lines like the following:
"
" /path/to/some-filename.js:13:3: Parsing error: Unexpected token
let l:parsing_pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\)$'
let l:output = []
for l:line in a:lines
let l:match = matchlist(l:line, l:pattern)
if len(l:match) == 0
" Try the parsing pattern for parsing errors.
let l:match = matchlist(l:line, l:parsing_pattern)
endif
if len(l:match) == 0
continue
endif
let l:type = 'Error'
let l:text = l:match[3]
" Take the error type from the output if available.
if !empty(l:match[4])
let l:type = split(l:match[4], '/')[0]
let l:text .= ' [' . l:match[4] . ']'
endif
" vcol is Needed to indicate that the column is a character.
call add(l:output, {
\ 'bufnr': a:buffer,
\ 'lnum': l:match[1] + 0,
\ 'vcol': 0,
\ 'col': l:match[2] + 0,
\ 'text': l:text,
\ 'type': l:type ==# 'Warning' ? 'W' : 'E',
\ 'nr': -1,
\})
endfor
return l:output
endfunction
call ale#linter#Define('javascript', {
\ 'name': 'eslint',
\ 'executable_callback': 'ale_linters#javascript#eslint#GetExecutable',
\ 'command_callback': 'ale_linters#javascript#eslint#GetCommand',
\ 'callback': 'ale_linters#javascript#eslint#Handle',
\})
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