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" Author: Zach Perrault -- @zperrault
" Description: FlowType checking for JavaScript files
let g:ale_javascript_flow_executable =
\ get(g:, 'ale_javascript_flow_executable', 'flow')
let g:ale_javascript_flow_use_global =
\ get(g:, 'ale_javascript_flow_use_global', 0)
function! ale_linters#javascript#flow#GetExecutable(buffer) abort
if ale#Var(a:buffer, 'javascript_flow_use_global')
return ale#Var(a:buffer, 'javascript_flow_executable')
endif
return ale#path#ResolveLocalPath(
\ a:buffer,
\ 'node_modules/.bin/flow',
\ ale#Var(a:buffer, 'javascript_flow_executable')
\)
endfunction
function! ale_linters#javascript#flow#GetCommand(buffer) abort
let l:flow_config = ale#path#FindNearestFile(a:buffer, '.flowconfig')
if empty(l:flow_config)
" Don't run Flow if we can't find a .flowconfig file.
return ''
endif
return ale#Escape(ale_linters#javascript#flow#GetExecutable(a:buffer))
\ . ' check-contents --respect-pragma --json --from ale %s'
endfunction
function! ale_linters#javascript#flow#Handle(buffer, lines) abort
let l:str = join(a:lines, '')
if l:str ==# ''
return []
endif
let l:flow_output = json_decode(l:str)
let l:output = []
for l:error in get(l:flow_output, 'errors', [])
" Each error is broken up into parts
let l:text = ''
let l:line = 0
let l:col = 0
for l:message in l:error.message
" Comments have no line of column information, so we skip them.
" In certain cases, `l:message.loc.source` points to a different path
" than the buffer one, thus we skip this loc information too.
if has_key(l:message, 'loc') && l:line ==# 0 && l:message.loc.source ==# expand('#' . a:buffer . ':p')
let l:line = l:message.loc.start.line + 0
let l:col = l:message.loc.start.column + 0
endif
if l:text ==# ''
let l:text = l:message.descr . ':'
else
let l:text = l:text . ' ' . l:message.descr
endif
endfor
if has_key(l:error, 'operation')
let l:text = l:text . ' See also: ' . l:error.operation.descr
endif
call add(l:output, {
\ 'lnum': l:line,
\ 'col': l:col,
\ 'text': l:text,
\ 'type': l:error.level ==# 'error' ? 'E' : 'W',
\})
endfor
return l:output
endfunction
call ale#linter#Define('javascript', {
\ 'name': 'flow',
\ 'executable_callback': 'ale_linters#javascript#flow#GetExecutable',
\ 'command_callback': 'ale_linters#javascript#flow#GetCommand',
\ 'callback': 'ale_linters#javascript#flow#Handle',
\})
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