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" Author: Keith Smiley <k@keith.so>, w0rp <devw0rp@gmail.com>
" Description: mypy support for optional python typechecking
call ale#Set('python_mypy_executable', 'mypy')
call ale#Set('python_mypy_ignore_invalid_syntax', 0)
call ale#Set('python_mypy_options', '')
call ale#Set('python_mypy_use_global', get(g:, 'ale_use_global_executables', 0))
function! ale_linters#python#mypy#GetExecutable(buffer) abort
return ale#python#FindExecutable(a:buffer, 'python_mypy', ['mypy'])
endfunction
" The directory to change to before running mypy
function! s:GetDir(buffer) abort
let l:project_root = ale#python#FindProjectRoot(a:buffer)
return !empty(l:project_root)
\ ? l:project_root
\ : expand('#' . a:buffer . ':p:h')
endfunction
function! ale_linters#python#mypy#GetCommand(buffer) abort
let l:dir = s:GetDir(a:buffer)
let l:executable = ale_linters#python#mypy#GetExecutable(a:buffer)
let l:exec_args = l:executable =~? 'pipenv$'
\ ? ' run mypy'
\ : ''
" We have to always switch to an explicit directory for a command so
" we can know with certainty the base path for the 'filename' keys below.
return ale#path#CdString(l:dir)
\ . ale#Escape(l:executable) . l:exec_args
\ . ' --show-column-numbers '
\ . ale#Var(a:buffer, 'python_mypy_options')
\ . ' --shadow-file %s %t %s'
endfunction
function! ale_linters#python#mypy#Handle(buffer, lines) abort
let l:dir = s:GetDir(a:buffer)
" Look for lines like the following:
"
" file.py:4: error: No library stub file for module 'django.db'
"
" Lines like these should be ignored below:
"
" file.py:4: note: (Stub files are from https://github.com/python/typeshed)
let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):?(\d+)?: (error|warning): (.+)$'
let l:output = []
for l:match in ale#util#GetMatches(a:lines, l:pattern)
" Skip invalid syntax errors if the option is on.
if l:match[5] is# 'invalid syntax'
\&& ale#Var(a:buffer, 'python_mypy_ignore_invalid_syntax')
continue
endif
call add(l:output, {
\ 'filename': ale#path#GetAbsPath(l:dir, l:match[1]),
\ 'lnum': l:match[2] + 0,
\ 'col': l:match[3] + 0,
\ 'type': l:match[4] is# 'error' ? 'E' : 'W',
\ 'text': l:match[5],
\})
endfor
return l:output
endfunction
call ale#linter#Define('python', {
\ 'name': 'mypy',
\ 'executable_callback': 'ale_linters#python#mypy#GetExecutable',
\ 'command_callback': 'ale_linters#python#mypy#GetCommand',
\ 'callback': 'ale_linters#python#mypy#Handle',
\})
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