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2fc7ed426a9337f9e5fada7b54d55af6d0c771de
[etc/vim.git] / ftplugin / python_flake8.vim
1 "
2 " Python filetype plugin for running flake8
3 " Language:     Python (ft=python)
4 " Maintainer:   Vincent Driessen <vincent@3rdcloud.com>
5 " Version:      Vim 7 (may work with lower Vim versions, but not tested)
6 " URL:          http://github.com/nvie/vim-flake8
7 "
8 " Only do this when not done yet for this buffer
9 if exists("b:loaded_flake8_ftplugin")
10     finish
11 endif
12 let b:loaded_flake8_ftplugin=1
13
14 if !exists("*Flake8()")
15     function Flake8()
16         if exists("g:flake8_cmd")
17             let s:flake8_cmd=g:flake8_cmd
18         else
19             let s:flake8_cmd="flake8"
20         endif
21
22         if !executable(s:flake8_cmd)
23             echoerr "File " . s:flake8_cmd . " not found. Please install it first."
24             return
25         endif
26
27         set lazyredraw   " delay redrawing
28         cclose           " close any existing cwindows
29
30         " store old grep settings (to restore later)
31         let l:old_gfm=&grepformat
32         let l:old_gp=&grepprg
33
34         " write any changes before continuing
35         if &readonly == 0
36             update
37         endif
38
39         " read config
40         if exists("g:flake8_ignore")
41             let s:flake8_ignores=" --ignore=".g:flake8_ignore
42         else
43             let s:flake8_ignores=""
44         endif
45
46         if exists("g:flake8_max_line_length")
47             let s:flake8_max_line_length=" --max-line-length=".g:flake8_max_line_length
48         else
49             let s:flake8_max_line_length=""
50         endif
51
52         if exists("g:flake8_max_complexity")
53             let s:flake8_max_complexity=" --max-complexity=".g:flake8_max_complexity
54         else
55             let s:flake8_max_complexity=""
56         endif
57
58         " perform the grep itself
59         let &grepformat="%f:%l:%c: %m\,%f:%l: %m"
60         let &grepprg=s:flake8_cmd.s:flake8_ignores.s:flake8_max_line_length.s:flake8_max_complexity
61         silent! grep! %
62
63         " restore grep settings
64         let &grepformat=l:old_gfm
65         let &grepprg=l:old_gp
66
67         " open cwindow
68         let has_results=getqflist() != []
69         if has_results
70             execute 'belowright copen'
71             setlocal wrap
72             nnoremap <buffer> <silent> c :cclose<CR>
73             nnoremap <buffer> <silent> q :cclose<CR>
74         endif
75
76         set nolazyredraw
77         redraw!
78
79         if has_results == 0
80             " Show OK status
81             hi Green ctermfg=green
82             echohl Green
83             echon "Flake8 check OK"
84             echohl
85         endif
86     endfunction
87 endif
88
89 " Add mappings, unless the user didn't want this.
90 " The default mapping is registered under to <F7> by default, unless the user
91 " remapped it already (or a mapping exists already for <F7>)
92 if !exists("no_plugin_maps") && !exists("no_flake8_maps")
93     if !hasmapto('Flake8(')
94         noremap <buffer> <F7> :call Flake8()<CR>
95     endif
96 endif