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" Author: Zach Perrault -- @zperrault
" Description: FlowType checking for JavaScript files
call ale#Set('javascript_flow_executable', 'flow')
call ale#Set('javascript_flow_use_global', 0)
function! ale_linters#javascript#flow#GetExecutable(buffer) abort
return ale#node#FindExecutable(a:buffer, 'javascript_flow', [
\ 'node_modules/.bin/flow',
\])
endfunction
function! ale_linters#javascript#flow#VersionCheck(buffer) abort
return ale#Escape(ale_linters#javascript#flow#GetExecutable(a:buffer))
\ . ' --version'
endfunction
function! ale_linters#javascript#flow#GetCommand(buffer, version_lines) 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
let l:executable = ale_linters#javascript#flow#GetExecutable(a:buffer)
let l:version = ale#semver#GetVersion(l:executable, a:version_lines)
" If we can parse the version number, then only use --respect-pragma
" if the version is >= 0.36.0, which added the argument.
let l:use_respect_pragma = empty(l:version)
\ || ale#semver#GTE(l:version, [0, 36])
return ale#Escape(l:executable)
\ . ' check-contents'
\ . (l:use_respect_pragma ? ' --respect-pragma': '')
\ . ' --json --from ale %s'
endfunction
" Filter lines of flow output until we find the first line where the JSON
" output starts.
function! s:GetJSONLines(lines) abort
let l:start_index = 0
for l:line in a:lines
if l:line[:0] is# '{'
break
endif
let l:start_index += 1
endfor
return a:lines[l:start_index :]
endfunction
function! ale_linters#javascript#flow#Handle(buffer, lines) abort
let l:str = join(s:GetJSONLines(a:lines), '')
if empty(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 is# 0
\&& ale#path#IsBufferPath(a:buffer, l:message.loc.source)
let l:line = l:message.loc.start.line + 0
let l:col = l:message.loc.start.column + 0
endif
if l:text is# ''
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 is# 'error' ? 'E' : 'W',
\})
endfor
return l:output
endfunction
call ale#linter#Define('javascript', {
\ 'name': 'flow',
\ 'executable_callback': 'ale_linters#javascript#flow#GetExecutable',
\ 'command_chain': [
\ {'callback': 'ale_linters#javascript#flow#VersionCheck'},
\ {'callback': 'ale_linters#javascript#flow#GetCommand'},
\ ],
\ 'callback': 'ale_linters#javascript#flow#Handle',
\ 'add_newline': !has('win32'),
\})
|
