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b26d9a1a75e05bc5d86efa9b479cf3138af526f2
[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_builtins")
41             let s:flake8_builtins_opt=" --builtins=".g:flake8_builtins
42         else
43             let s:flake8_builtins_opt=""
44         endif
45
46         if exists("g:flake8_ignore")
47             let s:flake8_ignores=" --ignore=".g:flake8_ignore
48         else
49             let s:flake8_ignores=""
50         endif
51
52         if exists("g:flake8_max_line_length")
53             let s:flake8_max_line_length=" --max-line-length=".g:flake8_max_line_length
54         else
55             let s:flake8_max_line_length=""
56         endif
57
58         if exists("g:flake8_max_complexity")
59             let s:flake8_max_complexity=" --max-complexity=".g:flake8_max_complexity
60         else
61             let s:flake8_max_complexity=""
62         endif
63
64         if exists("g:flake8_quickfix_location")
65             let s:flake8_quickfix_location=g:flake8_quickfix_location
66         else
67             let s:flake8_quickfix_location="belowright"
68         endif
69
70         " perform the grep itself
71         let &grepformat="%f:%l:%c: %m\,%f:%l: %m"
72         let &grepprg=s:flake8_cmd.s:flake8_builtins_opt.s:flake8_ignores.s:flake8_max_line_length.s:flake8_max_complexity
73         silent! grep! "%"
74
75         " restore grep settings
76         let &grepformat=l:old_gfm
77         let &grepprg=l:old_gp
78
79         " open cwindow
80         let has_results=getqflist() != []
81         if has_results
82             execute s:flake8_quickfix_location." copen"
83             setlocal wrap
84             nnoremap <buffer> <silent> c :cclose<CR>
85             nnoremap <buffer> <silent> q :cclose<CR>
86         endif
87
88         set nolazyredraw
89         redraw!
90
91         if has_results == 0
92             " Show OK status
93             hi Green ctermfg=green
94             echohl Green
95             echon "Flake8 check OK"
96             echohl
97         endif
98     endfunction
99 endif
100
101 " Add mappings, unless the user didn't want this.
102 " The default mapping is registered under to <F7> by default, unless the user
103 " remapped it already (or a mapping exists already for <F7>)
104 if !exists("no_plugin_maps") && !exists("no_flake8_maps")
105     if !hasmapto('Flake8(')
106         noremap <buffer> <F7> :call Flake8()<CR>
107     endif
108 endif