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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 ale#Var(a:buffer, 'javascript_eslint_use_global')
return ale#Var(a:buffer, 'javascript_eslint_executable')
endif
" Look for the kinds of paths that create-react-app generates first.
let l:executable = ale#path#ResolveLocalPath(
\ a:buffer,
\ 'node_modules/eslint/bin/eslint.js',
\ ''
\)
if !empty(l:executable)
return l:executable
endif
return ale#path#ResolveLocalPath(
\ a:buffer,
\ 'node_modules/.bin/eslint',
\ ale#Var(a:buffer, 'javascript_eslint_executable')
\)
endfunction
function! ale_linters#javascript#eslint#GetCommand(buffer) abort
return ale#Escape(ale_linters#javascript#eslint#GetExecutable(a:buffer))
\ . ' ' . ale#Var(a:buffer, 'javascript_eslint_options')
\ . ' -f unix --stdin --stdin-filename %s'
endfunction
let s:col_end_patterns = [
\ '\vParsing error: Unexpected token (.+) ',
\ '\v''(.+)'' is not defined.',
\ '\v%(Unexpected|Redundant use of) [''`](.+)[''`]',
\ '\vUnexpected (console) statement',
\]
function! ale_linters#javascript#eslint#Handle(buffer, lines) abort
let l:config_error_pattern = '\v^ESLint couldn''t find a configuration file'
\ . '|^Cannot read config file'
\ . '|^.*Configuration for rule .* is invalid'
" Look for a message in the first few lines which indicates that
" a configuration file couldn't be found.
for l:line in a:lines[:10]
if len(matchlist(l:line, l:config_error_pattern)) > 0
return [{
\ 'lnum': 1,
\ 'text': 'eslint configuration error (type :ALEDetail for more information)',
\ 'detail': join(a:lines, "\n"),
\}]
endif
endfor
" 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:match in ale#util#GetMatches(a:lines, [l:pattern, l:parsing_pattern])
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
let l:obj = {
\ 'lnum': l:match[1] + 0,
\ 'col': l:match[2] + 0,
\ 'text': l:text,
\ 'type': l:type ==# 'Warning' ? 'W' : 'E',
\}
for l:col_match in ale#util#GetMatches(l:text, s:col_end_patterns)
let l:obj.end_col = l:obj.col + len(l:col_match[1]) - 1
endfor
call add(l:output, l:obj)
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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