"============================================================================ "File: syntastic.vim "Description: vim plugin for on the fly syntax checking "Maintainer: Martin Grenfell "License: This program is free software. It comes without any warranty, " to the extent permitted by applicable law. You can redistribute " it and/or modify it under the terms of the Do What The Fuck You " Want To Public License, Version 2, as published by Sam Hocevar. " See http://sam.zoy.org/wtfpl/COPYING for more details. " "============================================================================ " "Syntastic does the following: "---------------------------------------------------------------------------- " "1. Provides a statusline flag to notify you of errors in the buffer "2. Uses the :sign interface to point out lines with syntax errors "3. Defines :Errors, which opens the syntax errors in location list window " "To use the above functionality, a syntax checker plugin must be present for "the filetype in question (more about that below). " " "Using the statusline flag "---------------------------------------------------------------------------- " "To use the statusline flag, this must appear in your &statusline setting: " %{SyntasticStatuslineFlag()} " "Something like this could be more useful: " " set statusline+=%#warningmsg# " set statusline+=%{SyntasticStatuslineFlag()} " set statusline+=%* " " "Implementing syntax checker plugins: "---------------------------------------------------------------------------- " "A syntax checker plugin is really nothing more than a single function. You "should define them in ~/.vim/syntax_checkers/.vim. This is purely "for convenience; Syntastic doesn't actually care where these functions are "defined. " "A syntax checker plugin should define a function of the form: " " SyntaxCheckers__GetLocList() " "The output of this function should be of the same form as the getloclist() "function. See :help getloclist() and :help getqflist() for details. " "Syntastic is designed so that the syntax checker plugins can be implemented "using vims :lmake facility without screwing up the users current make "settings. To this end, the following settings are saved and restored after "the syntax checking function is called: " " * the users location list " * &makeprg " * &errorformat " "This way, a typical syntax checker function can look like this: " " function! SyntaxCheckers_ruby_GetLocList() " set makeprg=ruby\ -c\ % " set errorformat=%-GSyntax\ OK,%A%f:%l:\ syntax\ error\\,\ %m,%Z%p^,%-C%.%# " silent lmake! " return getloclist(0) " endfunction " "After this function is called, makeprg, errorformat and the location list "will be restored to their previous settings. " "NOTE: syntax checkers *can* piggy back off :lmake, but they dont *have* to. If "&errorformat is too crazy for you then you can parse the syntax checker "output yourself and compile it into the loclist style data structure. " " "Options: "---------------------------------------------------------------------------- " "Use this option to tell syntastic to use the :sign interface to mark syntax "errors " let g:syntastic_enable_signs=1 " " "============================================================================ if exists("g:loaded_syntastic_plugin") finish endif let g:loaded_syntastic_plugin = 1 let s:running_windows = has("win16") || has("win32") || has("win64") if !exists("g:syntastic_enable_signs") let g:syntastic_enable_signs = 0 endif if !exists("g:syntastic_auto_loc_list") let g:syntastic_auto_loc_list = 0 endif "load all the syntax checkers runtime! syntax_checkers/*.vim "refresh and redraw all the error info for this buf when saving or reading autocmd bufreadpost,bufwritepost * call s:UpdateErrors() function! s:UpdateErrors() call s:CacheErrors() if g:syntastic_enable_signs call s:ClearSigns() call s:SignErrors() endif if g:syntastic_auto_loc_list if s:BufHasErrors() call s:ShowLocList() else lclose endif endif endfunction "detect and cache all syntax errors in this buffer " "depends on a function called SyntaxCheckers_{&ft}_GetLocList() existing "elsewhere " "saves and restores some settings that the syntax checking function may wish "to screw with if it uses :lmake! function! s:CacheErrors() let b:syntastic_loclist = [] for ft in split(&ft, '\.') if exists("*SyntaxCheckers_". ft ."_GetLocList") && filereadable(expand("%")) let oldlocixlist = getloclist(0) let old_makeprg = &makeprg let old_shellpipe = &shellpipe let old_errorformat = &errorformat if !s:running_windows "this is a hack to stop the screen needing to be ':redraw'n when "when :lmake is run. Otherwise the screen flickers annoyingly let &shellpipe='&>' endif let b:syntastic_loclist = extend(b:syntastic_loclist, SyntaxCheckers_{ft}_GetLocList()) call setloclist(0, oldlocixlist) let &makeprg = old_makeprg let &errorformat = old_errorformat let &shellpipe=old_shellpipe endif endfor endfunction "return true if there are cached errors for this buf function! s:BufHasErrors() return exists("b:syntastic_loclist") && !empty(b:syntastic_loclist) endfunction "use >> to display syntax errors in the sign column sign define SyntaxError text=>> texthl=error "start counting sign ids at 5000, start here to hopefully avoid conflicting "with any other code that places signs (not sure if this precaution is "actually needed) let s:first_sign_id = 5000 let s:next_sign_id = s:first_sign_id "place SyntaxError signs by all syntax errs in the buffer function s:SignErrors() if s:BufHasErrors() for i in b:syntastic_loclist exec "sign place ". s:next_sign_id ." line=". i['lnum'] ." name=SyntaxError file=". expand("%:p") call add(s:BufSignIds(), s:next_sign_id) let s:next_sign_id += 1 endfor endif endfunction "remove all SyntaxError signs in the buffer function! s:ClearSigns() for i in s:BufSignIds() exec "sign unplace " . i endfor let b:syntastic_sign_ids = [] let s:next_sign_id = s:first_sign_id endfunction "get all the ids of the SyntaxError signs in the buffer function! s:BufSignIds() if !exists("b:syntastic_sign_ids") let b:syntastic_sign_ids = [] endif return b:syntastic_sign_ids endfunction "display the cached errors for this buf in the location list function! s:ShowLocList() if exists("b:syntastic_loclist") call setloclist(0, b:syntastic_loclist) lopen endif endfunction command Errors call s:ShowLocList() "return [syntax:X(Y)] if syntax errors are detected in the buffer, where X is the "line number of the first error and Y is the number of errors detected. (Y) is "only displayed if > 1 errors are detected " "return '' if no errors are cached for the buffer function! SyntasticStatuslineFlag() if s:BufHasErrors() let first_err_line = b:syntastic_loclist[0]['lnum'] let err_count = "" if len(b:syntastic_loclist) > 1 let err_count = "(" . len(b:syntastic_loclist) . ")" endif return '[syntax:' . first_err_line . err_count . ']' else return '' endif endfunction " vim: set et sts=4 sw=4: