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" Author: Keith Smiley <k@keith.so>, w0rp <devw0rp@gmail.com>
" Description: mypy support for optional python typechecking
let g:ale_python_mypy_options = get(g:, 'ale_python_mypy_options', '')
function! g:ale_linters#python#mypy#GetCommand(buffer) abort
let l:automatic_stubs_dir = ale#util#FindNearestDirectory(a:buffer, 'stubs')
" TODO: Add Windows support
let l:automatic_stubs_command = (has('unix') && !empty(l:automatic_stubs_dir))
\ ? 'MYPYPATH=' . l:automatic_stubs_dir . ' '
\ : ''
return l:automatic_stubs_command
\ . g:ale#util#stdin_wrapper
\ . ' .py mypy --show-column-numbers '
\ . g:ale_python_mypy_options
endfunction
let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.\-_]\+'
function! g:ale_linters#python#mypy#Handle(buffer, lines) abort
" Look for lines like the following:
"
" file.py:4: error: No library stub file for module 'django.db'
"
" Lines like these should be ignored below:
"
" file.py:4: note: (Stub files are from https://github.com/python/typeshed)
let l:pattern = '^' . s:path_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
continue
endif
if l:match[4] =~# 'Stub files are from'
" The lines telling us where to get stub files from make it so
" we can't read the actual errors, so exclude them.
continue
endif
call add(l:output, {
\ 'bufnr': a:buffer,
\ 'lnum': l:match[1] + 0,
\ 'vcol': 0,
\ 'col': l:match[2] + 0,
\ 'text': l:match[4],
\ 'type': l:match[3] =~# 'error' ? 'E' : 'W',
\ 'nr': -1,
\})
endfor
return l:output
endfunction
call g:ale#linter#Define('python', {
\ 'name': 'mypy',
\ 'executable': 'mypy',
\ 'command_callback': 'ale_linters#python#mypy#GetCommand',
\ 'callback': 'ale_linters#python#mypy#Handle',
\})
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