1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
" Author: w0rp <devw0rp@gmail.com>
" Description: flake8 for python files
let g:ale_python_flake8_executable =
\ get(g:, 'ale_python_flake8_executable', 'flake8')
" Support an old setting as a fallback.
let s:default_options = get(g:, 'ale_python_flake8_args', '')
let g:ale_python_flake8_options =
\ get(g:, 'ale_python_flake8_options', s:default_options)
let g:ale_python_flake8_use_global = get(g:, 'ale_python_flake8_use_global', 0)
function! s:UsingModule(buffer) abort
return ale#Var(a:buffer, 'python_flake8_options') =~# ' *-m flake8'
endfunction
function! ale_linters#python#flake8#GetExecutable(buffer) abort
if !s:UsingModule(a:buffer)
return ale#python#FindExecutable(a:buffer, 'python_flake8', ['flake8'])
endif
return ale#Var(a:buffer, 'python_flake8_executable')
endfunction
function! ale_linters#python#flake8#VersionCheck(buffer) abort
let l:executable = ale_linters#python#flake8#GetExecutable(a:buffer)
" If we have previously stored the version number in a cache, then
" don't look it up again.
if ale#semver#HasVersion(l:executable)
" Returning an empty string skips this command.
return ''
endif
let l:executable = ale#Escape(l:executable)
let l:module_string = s:UsingModule(a:buffer) ? ' -m flake8' : ''
return l:executable . l:module_string . ' --version'
endfunction
function! ale_linters#python#flake8#GetCommand(buffer, version_output) abort
let l:executable = ale_linters#python#flake8#GetExecutable(a:buffer)
let l:version = ale#semver#GetVersion(l:executable, a:version_output)
" Only include the --stdin-display-name argument if we can parse the
" flake8 version, and it is recent enough to support it.
let l:display_name_args = ale#semver#GTE(l:version, [3, 0, 0])
\ ? ' --stdin-display-name %s'
\ : ''
let l:options = ale#Var(a:buffer, 'python_flake8_options')
return ale#Escape(l:executable)
\ . (!empty(l:options) ? ' ' . l:options : '')
\ . ' --format=default'
\ . l:display_name_args . ' -'
endfunction
let s:end_col_pattern_map = {
\ 'F405': '\(.\+\) may be undefined',
\ 'F821': 'undefined name ''\([^'']\+\)''',
\ 'F999': '^''\([^'']\+\)''',
\ 'F841': 'local variable ''\([^'']\+\)''',
\}
function! ale_linters#python#flake8#Handle(buffer, lines) abort
for l:line in a:lines[:10]
if match(l:line, '^Traceback') >= 0
return [{
\ 'lnum': 1,
\ 'text': 'An exception was thrown. See :ALEDetail',
\ 'detail': join(a:lines, "\n"),
\}]
endif
endfor
" Matches patterns line the following:
"
" Matches patterns line the following:
"
" stdin:6:6: E111 indentation is not a multiple of four
let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):?(\d+)?: ([[:alnum:]]+) (.*)$'
let l:output = []
for l:match in ale#util#GetMatches(a:lines, l:pattern)
let l:code = l:match[3]
if (l:code is# 'W291' || l:code is# 'W293')
\ && !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
" Skip warnings for trailing whitespace if the option is off.
continue
endif
let l:item = {
\ 'lnum': l:match[1] + 0,
\ 'col': l:match[2] + 0,
\ 'text': l:match[4],
\ 'code': l:code,
\ 'type': 'W',
\}
if l:code[:0] is# 'F' || l:code is# 'E999'
let l:item.type = 'E'
elseif l:code[:0] is# 'E'
let l:item.type = 'E'
let l:item.sub_type = 'style'
elseif l:code[:0] is# 'W'
let l:item.sub_type = 'style'
endif
let l:end_col_pattern = get(s:end_col_pattern_map, l:code, '')
if !empty(l:end_col_pattern)
let l:end_col_match = matchlist(l:match[4], l:end_col_pattern)
if !empty(l:end_col_match)
let l:item.end_col = l:item.col + len(l:end_col_match[1]) - 1
endif
endif
call add(l:output, l:item)
endfor
return l:output
endfunction
call ale#linter#Define('python', {
\ 'name': 'flake8',
\ 'executable_callback': 'ale_linters#python#flake8#GetExecutable',
\ 'command_chain': [
\ {'callback': 'ale_linters#python#flake8#VersionCheck'},
\ {'callback': 'ale_linters#python#flake8#GetCommand', 'output_stream': 'both'},
\ ],
\ 'callback': 'ale_linters#python#flake8#Handle',
\})
|
