135 lines
4.3 KiB
VimL
135 lines
4.3 KiB
VimL
" Author: w0rp <devw0rp@gmail.com>
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" Description: flake8 for python files
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let g:ale_python_flake8_executable =
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\ get(g:, 'ale_python_flake8_executable', 'flake8')
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" Support an old setting as a fallback.
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let s:default_options = get(g:, 'ale_python_flake8_args', '')
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let g:ale_python_flake8_options =
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\ get(g:, 'ale_python_flake8_options', s:default_options)
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let g:ale_python_flake8_use_global = get(g:, 'ale_python_flake8_use_global', 0)
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function! s:UsingModule(buffer) abort
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return ale#Var(a:buffer, 'python_flake8_options') =~# ' *-m flake8'
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endfunction
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function! ale_linters#python#flake8#GetExecutable(buffer) abort
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if !s:UsingModule(a:buffer)
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return ale#python#FindExecutable(a:buffer, 'python_flake8', ['flake8'])
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endif
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return ale#Var(a:buffer, 'python_flake8_executable')
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endfunction
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function! ale_linters#python#flake8#VersionCheck(buffer) abort
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let l:executable = ale_linters#python#flake8#GetExecutable(a:buffer)
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" If we have previously stored the version number in a cache, then
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" don't look it up again.
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if ale#semver#HasVersion(l:executable)
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" Returning an empty string skips this command.
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return ''
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endif
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let l:executable = ale#Escape(l:executable)
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let l:module_string = s:UsingModule(a:buffer) ? ' -m flake8' : ''
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return l:executable . l:module_string . ' --version'
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endfunction
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function! ale_linters#python#flake8#GetCommand(buffer, version_output) abort
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let l:executable = ale_linters#python#flake8#GetExecutable(a:buffer)
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let l:version = ale#semver#GetVersion(l:executable, a:version_output)
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" Only include the --stdin-display-name argument if we can parse the
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" flake8 version, and it is recent enough to support it.
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let l:display_name_args = ale#semver#GTE(l:version, [3, 0, 0])
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\ ? ' --stdin-display-name %s'
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\ : ''
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let l:options = ale#Var(a:buffer, 'python_flake8_options')
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return ale#Escape(l:executable)
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\ . (!empty(l:options) ? ' ' . l:options : '')
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\ . ' --format=default'
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\ . l:display_name_args . ' -'
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endfunction
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let s:end_col_pattern_map = {
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\ 'F405': '\(.\+\) may be undefined',
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\ 'F821': 'undefined name ''\([^'']\+\)''',
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\ 'F999': '^''\([^'']\+\)''',
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\ 'F841': 'local variable ''\([^'']\+\)''',
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\}
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function! ale_linters#python#flake8#Handle(buffer, lines) abort
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for l:line in a:lines[:10]
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if match(l:line, '^Traceback') >= 0
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return [{
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\ 'lnum': 1,
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\ 'text': 'An exception was thrown. See :ALEDetail',
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\ 'detail': join(a:lines, "\n"),
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\}]
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endif
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endfor
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" Matches patterns line the following:
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"
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" Matches patterns line the following:
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"
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" stdin:6:6: E111 indentation is not a multiple of four
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let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):?(\d+)?: ([[:alnum:]]+) (.*)$'
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let l:output = []
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for l:match in ale#util#GetMatches(a:lines, l:pattern)
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let l:code = l:match[3]
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if (l:code is# 'W291' || l:code is# 'W293')
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\ && !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
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" Skip warnings for trailing whitespace if the option is off.
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continue
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endif
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let l:item = {
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\ 'lnum': l:match[1] + 0,
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\ 'col': l:match[2] + 0,
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\ 'text': l:code . ': ' . l:match[4],
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\ 'type': 'W',
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\}
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if l:code[:0] is# 'F' || l:code is# 'E999'
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let l:item.type = 'E'
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elseif l:code[:0] is# 'E'
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let l:item.type = 'E'
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let l:item.sub_type = 'style'
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elseif l:code[:0] is# 'W'
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let l:item.sub_type = 'style'
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endif
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let l:end_col_pattern = get(s:end_col_pattern_map, l:code, '')
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if !empty(l:end_col_pattern)
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let l:end_col_match = matchlist(l:match[4], l:end_col_pattern)
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if !empty(l:end_col_match)
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let l:item.end_col = l:item.col + len(l:end_col_match[1]) - 1
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endif
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endif
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call add(l:output, l:item)
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endfor
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return l:output
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endfunction
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call ale#linter#Define('python', {
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\ 'name': 'flake8',
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\ 'executable_callback': 'ale_linters#python#flake8#GetExecutable',
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\ 'command_chain': [
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\ {'callback': 'ale_linters#python#flake8#VersionCheck'},
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\ {'callback': 'ale_linters#python#flake8#GetCommand', 'output_stream': 'both'},
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\ ],
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\ 'callback': 'ale_linters#python#flake8#Handle',
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\})
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