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         " perform the grep itself
  65         let &grepformat="%f:%l:%c: %m\,%f:%l: %m"
  66         let &grepprg=s:flake8_cmd.s:flake8_builtins_opt.s:flake8_ignores.s:flake8_max_line_length.s:flake8_max_complexity
  67         silent! grep! %
  68
  69         " restore grep settings
  70         let &grepformat=l:old_gfm
  71         let &grepprg=l:old_gp
  72
  73         " open cwindow
  74         let has_results=getqflist() != []
  75         if has_results
  76             execute 'belowright copen'
  77             setlocal wrap
  78             nnoremap <buffer> <silent> c :cclose<CR>
  79             nnoremap <buffer> <silent> q :cclose<CR>
  80         endif
  81
  82         set nolazyredraw
  83         redraw!
  84
  85         if has_results == 0
  86             " Show OK status
  87             hi Green ctermfg=green
  88             echohl Green
  89             echon "Flake8 check OK"
  90             echohl
  91         endif
  92     endfunction
  93 endif
  94
  95 " Add mappings, unless the user didn't want this.
  96 " The default mapping is registered under to <F7> by default, unless the user
  97 " remapped it already (or a mapping exists already for <F7>)
  98 if !exists("no_plugin_maps") && !exists("no_flake8_maps")
  99     if !hasmapto('Flake8(')
 100         noremap <buffer> <F7> :call Flake8()<CR>
 101     endif
 102 endif