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52d9fdfcfaa7718fa877be460dcd5a9fa7c5d849
[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("g:flake8_cmd")
15     let s:flake8_cmd=g:flake8_cmd
16 else
17     let s:flake8_cmd="flake8"
18 endif
19
20 let s:flake8_ignores=""
21 if exists("g:flake8_ignore")
22     let s:flake8_ignores=" --ignore=".g:flake8_ignore
23 endif
24
25 if !exists("*Flake8()")
26     function Flake8()
27         if !executable(s:flake8_cmd)
28             echoerr "File " . s:flake8_cmd . " not found. Please install it first."
29             return
30         endif
31
32         set lazyredraw   " delay redrawing
33         cclose           " close any existing cwindows
34
35         " store old grep settings (to restore later)
36         let l:old_gfm=&grepformat
37         let l:old_gp=&grepprg
38
39         " write any changes before continuing
40         if &readonly == 0
41             update
42         endif
43
44         " perform the grep itself
45         let &grepformat="%f:%l:%c: %m\,%f:%l: %m"
46         let &grepprg=s:flake8_cmd.s:flake8_ignores
47         silent! grep! %
48
49         " restore grep settings
50         let &grepformat=l:old_gfm
51         let &grepprg=l:old_gp
52
53         " open cwindow
54         let has_results=getqflist() != []
55         if has_results
56             execute 'belowright copen'
57             setlocal wrap
58             nnoremap <buffer> <silent> c :cclose<CR>
59             nnoremap <buffer> <silent> q :cclose<CR>
60         endif
61
62         set nolazyredraw
63         redraw!
64
65         if has_results == 0
66             " Show OK status
67             hi Green ctermfg=green
68             echohl Green
69             echon "Flake8 check OK"
70             echohl
71         endif
72     endfunction
73 endif
74
75 " Add mappings, unless the user didn't want this.
76 " The default mapping is registered under to <F7> by default, unless the user
77 " remapped it already (or a mapping exists already for <F7>)
78 if !exists("no_plugin_maps") && !exists("no_flake8_maps")
79     if !hasmapto('Flake8(')
80         noremap <buffer> <F7> :call Flake8()<CR>
81     endif
82 endif