syntastic.vim

"============================================================================
"File:        syntastic.vim
"Description: Vim plugin for on the fly syntax checking.
"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.
"
"============================================================================

if exists("g:loaded_syntastic_plugin")
    finish
endif
let g:loaded_syntastic_plugin = 1

if has('reltime')
    let g:syntastic_start = reltime()
    lockvar! g:syntastic_start
endif

let g:syntastic_version = '3.4.0-86'
lockvar g:syntastic_version

" Sanity checks {{{1

for s:feature in ['autocmd', 'eval', 'modify_fname', 'quickfix', 'user_commands']
    if !has(s:feature)
        call syntastic#log#error("need Vim compiled with feature " . s:feature)
        finish
    endif
endfor

let s:running_windows = syntastic#util#isRunningWindows()
lockvar s:running_windows

if !s:running_windows && executable('uname')
    try
        let s:uname = system('uname')
    catch /\m^Vim\%((\a\+)\)\=:E484/
        call syntastic#log#error("your shell " . &shell . " doesn't use traditional UNIX syntax for redirections")
        finish
    endtry
    lockvar s:uname
endif

" }}}1

" Defaults {{{1

let g:syntastic_defaults = {
        \ 'aggregate_errors':         0,
        \ 'always_populate_loc_list': 0,
        \ 'auto_jump':                0,
        \ 'auto_loc_list':            2,
        \ 'bash_hack':                1,
        \ 'check_on_open':            0,
        \ 'check_on_wq':              1,
        \ 'debug':                    0,
        \ 'echo_current_error':       1,
        \ 'enable_balloons':          1,
        \ 'enable_highlighting':      1,
        \ 'enable_signs':             1,
        \ 'error_symbol':             '>>',
        \ 'filetype_map':             {},
        \ 'full_redraws':             !(has('gui_running') || has('gui_macvim')),
        \ 'id_checkers':              1,
        \ 'ignore_files':             [],
        \ 'loc_list_height':          10,
        \ 'quiet_messages':           {},
        \ 'reuse_loc_lists':          (v:version >= 704),
        \ 'sort_aggregated_errors':   1,
        \ 'stl_format':               '[Syntax: line:%F (%t)]',
        \ 'style_error_symbol':       'S>',
        \ 'style_warning_symbol':     'S>',
        \ 'warning_symbol':           '>>'
    \ }
lockvar! g:syntastic_defaults

for s:key in keys(g:syntastic_defaults)
    if !exists('g:syntastic_' . s:key)
        let g:syntastic_{s:key} = g:syntastic_defaults[s:key]
    endif
endfor

if exists("g:syntastic_quiet_warnings")
    call syntastic#log#deprecationWarn("variable g:syntastic_quiet_warnings is deprecated, please use let g:syntastic_quiet_messages = {'level': 'warnings'} instead")
    if g:syntastic_quiet_warnings
        let s:quiet_warnings = get(g:syntastic_quiet_messages, 'type', [])
        if type(s:quiet_warnings) != type([])
            let s:quiet_warnings = [s:quiet_warnings]
        endif
        call add(s:quiet_warnings, 'warnings')
        let g:syntastic_quiet_messages['type'] = s:quiet_warnings
    endif
endif

" }}}1

" Debug {{{1

let s:debug_dump_options = [
        \ 'shell',
        \ 'shellcmdflag',
        \ 'shellpipe',
        \ 'shellquote',
        \ 'shellredir',
        \ 'shellslash',
        \ 'shelltemp',
        \ 'shellxquote'
    \ ]
if v:version > 703 || (v:version == 703 && has('patch446'))
    call add(s:debug_dump_options, 'shellxescape')
endif
lockvar! s:debug_dump_options

" debug constants
let     g:SyntasticDebugTrace         = 1
lockvar g:SyntasticDebugTrace
let     g:SyntasticDebugLoclist       = 2
lockvar g:SyntasticDebugLoclist
let     g:SyntasticDebugNotifications = 4
lockvar g:SyntasticDebugNotifications
let     g:SyntasticDebugAutocommands  = 8
lockvar g:SyntasticDebugAutocommands
let     g:SyntasticDebugVariables     = 16
lockvar g:SyntasticDebugVariables

" }}}1

runtime! plugin/syntastic/*.vim

let s:registry = g:SyntasticRegistry.Instance()
let s:notifiers = g:SyntasticNotifiers.Instance()
let s:modemap = g:SyntasticModeMap.Instance()

" Commands {{{1

" @vimlint(EVL103, 1, a:cursorPos)
" @vimlint(EVL103, 1, a:cmdLine)
" @vimlint(EVL103, 1, a:argLead)
function! s:CompleteCheckerName(argLead, cmdLine, cursorPos) " {{{2
    let checker_names = []
    for ft in s:resolveFiletypes()
        call extend(checker_names, s:registry.getNamesOfAvailableCheckers(ft))
    endfor
    return join(checker_names, "\n")
endfunction " }}}2
" @vimlint(EVL103, 0, a:cursorPos)
" @vimlint(EVL103, 0, a:cmdLine)
" @vimlint(EVL103, 0, a:argLead)


" @vimlint(EVL103, 1, a:cursorPos)
" @vimlint(EVL103, 1, a:cmdLine)
" @vimlint(EVL103, 1, a:argLead)
function! s:CompleteFiletypes(argLead, cmdLine, cursorPos) " {{{2
    return join(s:registry.getKnownFiletypes(), "\n")
endfunction " }}}2
" @vimlint(EVL103, 0, a:cursorPos)
" @vimlint(EVL103, 0, a:cmdLine)
" @vimlint(EVL103, 0, a:argLead)

command! SyntasticToggleMode call s:ToggleMode()
command! -nargs=* -complete=custom,s:CompleteCheckerName SyntasticCheck
            \ call s:UpdateErrors(0, <f-args>) <bar>
            \ call syntastic#util#redraw(g:syntastic_full_redraws)
command! Errors call s:ShowLocList()
command! -nargs=? -complete=custom,s:CompleteFiletypes SyntasticInfo
            \ call s:modemap.echoMode() |
            \ call s:registry.echoInfoFor(s:resolveFiletypes(<f-args>))
command! SyntasticReset
            \ call s:ClearCache() |
            \ call s:notifiers.refresh(g:SyntasticLoclist.New([]))
command! SyntasticSetLoclist call g:SyntasticLoclist.current().setloclist()

" }}}1

" Autocommands and hooks {{{1

augroup syntastic
    autocmd BufReadPost * call s:BufReadPostHook()
    autocmd BufWritePost * call s:BufWritePostHook()

    autocmd BufWinEnter * call s:BufWinEnterHook()

    " TODO: the next autocmd should be "autocmd BufWinLeave * if &buftype == '' | lclose | endif"
    " but in recent versions of Vim lclose can no longer be called from BufWinLeave
    autocmd BufEnter * call s:BufEnterHook()
augroup END

if v:version > 703 || (v:version == 703 && has('patch544'))
    " QuitPre was added in Vim 7.3.544
    augroup syntastic
        autocmd QuitPre * call s:QuitPreHook()
    augroup END
endif

function! s:BufReadPostHook() " {{{2
    if g:syntastic_check_on_open
        call syntastic#log#debug(g:SyntasticDebugAutocommands,
            \ 'autocmd: BufReadPost, buffer ' . bufnr("") . ' = ' . string(bufname(str2nr(bufnr("")))))
        call s:UpdateErrors(1)
    endif
endfunction " }}}2

function! s:BufWritePostHook() " {{{2
    call syntastic#log#debug(g:SyntasticDebugAutocommands,
        \ 'autocmd: BufWritePost, buffer ' . bufnr("") . ' = ' . string(bufname(str2nr(bufnr("")))))
    call s:UpdateErrors(1)
endfunction " }}}2

function! s:BufWinEnterHook() " {{{2
    call syntastic#log#debug(g:SyntasticDebugAutocommands,
        \ 'autocmd: BufWinEnter, buffer ' . bufnr("") . ' = ' . string(bufname(str2nr(bufnr("")))) .
        \ ', &buftype = ' . string(&buftype))
    if &buftype == ''
        call s:notifiers.refresh(g:SyntasticLoclist.current())
    endif
endfunction " }}}2

function! s:BufEnterHook() " {{{2
    call syntastic#log#debug(g:SyntasticDebugAutocommands,
        \ 'autocmd: BufEnter, buffer ' . bufnr("") . ' = ' . string(bufname(str2nr(bufnr("")))) .
        \ ', &buftype = ' . string(&buftype))
    " TODO: at this point there is no b:syntastic_loclist
    let loclist = filter(copy(getloclist(0)), 'v:val["valid"] == 1')
    let owner = str2nr(getbufvar(bufnr(""), 'syntastic_owner_buffer'))
    let buffers = syntastic#util#unique(map(loclist, 'v:val["bufnr"]') + (owner ? [owner] : []))
    if &buftype == 'quickfix' && !empty(loclist) && empty(filter( buffers, 'syntastic#util#bufIsActive(v:val)' ))
        call SyntasticLoclistHide()
    endif
endfunction " }}}2

function! s:QuitPreHook() " {{{2
    call syntastic#log#debug(g:SyntasticDebugAutocommands,
        \ 'autocmd: QuitPre, buffer ' . bufnr("") . ' = ' . string(bufname(str2nr(bufnr("")))))
    let b:syntastic_skip_checks = !g:syntastic_check_on_wq
    call SyntasticLoclistHide()
endfunction " }}}2

" }}}1

" Main {{{1

"refresh and redraw all the error info for this buf when saving or reading
function! s:UpdateErrors(auto_invoked, ...) " {{{2
    if s:skipFile()
        return
    endif

    call s:modemap.synch()
    let run_checks = !a:auto_invoked || s:modemap.allowsAutoChecking(&filetype)
    if run_checks
        call s:CacheErrors(a:000)
    endif

    let loclist = g:SyntasticLoclist.current()

    " populate loclist and jump {{{3
    let do_jump = syntastic#util#var('auto_jump')
    if do_jump == 2
        let first = loclist.getFirstIssue()
        let type = get(first, 'type', '')
        let do_jump = type ==? 'E'
    endif

    let w:syntastic_loclist_set = 0
    if syntastic#util#var('always_populate_loc_list') || do_jump
        call syntastic#log#debug(g:SyntasticDebugNotifications, 'loclist: setloclist (new)')
        call setloclist(0, loclist.getRaw())
        let w:syntastic_loclist_set = 1
        if run_checks && do_jump && !loclist.isEmpty()
            call syntastic#log#debug(g:SyntasticDebugNotifications, 'loclist: jump')
            silent! lrewind

            " XXX: Vim doesn't call autocmd commands in a predictible
            " order, which can lead to missing filetype when jumping
            " to a new file; the following is a workaround for the
            " resulting brain damage
            if &filetype == ''
                silent! filetype detect
            endif
        endif
    endif
    " }}}3

    call s:notifiers.refresh(loclist)
endfunction " }}}2

"clear the loc list for the buffer
function! s:ClearCache() " {{{2
    call s:notifiers.reset(g:SyntasticLoclist.current())
    call b:syntastic_loclist.destroy()
endfunction " }}}2

"detect and cache all syntax errors in this buffer
function! s:CacheErrors(checker_names) " {{{2
    call s:ClearCache()
    let newLoclist = g:SyntasticLoclist.New([])

    if !s:skipFile()
        " debug logging {{{3
        call syntastic#log#debugShowVariables(g:SyntasticDebugTrace, 'version')
        call syntastic#log#debugShowOptions(g:SyntasticDebugTrace, s:debug_dump_options)
        call syntastic#log#debugDump(g:SyntasticDebugVariables)
        call syntastic#log#debugShowVariables(g:SyntasticDebugTrace, 'aggregate_errors')
        call syntastic#log#debug(g:SyntasticDebugTrace, 'getcwd() = ' . getcwd())
        " }}}3

        let filetypes = s:resolveFiletypes()
        let aggregate_errors = syntastic#util#var('aggregate_errors') || len(filetypes) > 1
        let decorate_errors = aggregate_errors && syntastic#util#var('id_checkers')
        let sort_aggregated_errors = aggregate_errors && syntastic#util#var('sort_aggregated_errors')

        let clist = []
        for type in filetypes
            call extend(clist, s:registry.getCheckers(type, a:checker_names))
        endfor

        let names = []
        let unavailable_checkers = 0
        for checker in clist
            let cname = checker.getFiletype() . '/' . checker.getName()
            if !checker.isAvailable()
                call syntastic#log#debug(g:SyntasticDebugTrace, 'CacheErrors: Checker ' . cname . ' is not available')
                let unavailable_checkers += 1
                continue
            endif

            call syntastic#log#debug(g:SyntasticDebugTrace, 'CacheErrors: Invoking checker: ' . cname)

            let loclist = checker.getLocList()

            if !loclist.isEmpty()
                if decorate_errors
                    call loclist.decorate(cname)
                endif
                call add(names, cname)
                if checker.getWantSort() && !sort_aggregated_errors
                    call loclist.sort()
                    call syntastic#log#debug(g:SyntasticDebugLoclist, 'sorted:', loclist)
                endif

                let newLoclist = newLoclist.extend(loclist)

                if !aggregate_errors
                    break
                endif
            endif
        endfor

        " set names {{{3
        if !empty(names)
            if len(syntastic#util#unique(map( copy(names), 'substitute(v:val, "\\m/.*", "", "")' ))) == 1
                let type = substitute(names[0], '\m/.*', '', '')
                let name = join(map( names, 'substitute(v:val, "\\m.\\{-}/", "", "")' ), ', ')
                call newLoclist.setName( name . ' ('. type . ')' )
            else
                " checkers from mixed types
                call newLoclist.setName(join(names, ', '))
            endif
        endif
        " }}}3

        " issue warning about no active checkers {{{3
        if len(clist) == unavailable_checkers
            if !empty(a:checker_names)
                if len(a:checker_names) == 1
                    call syntastic#log#warn('checker ' . a:checker_names[0] . ' is not available')
                else
                    call syntastic#log#warn('checkers ' . join(a:checker_names, ', ') . ' are not available')
                endif
            else
                call syntastic#log#debug(g:SyntasticDebugTrace, 'CacheErrors: no checkers available for ' . &filetype)
            endif
        endif
        " }}}3

        call syntastic#log#debug(g:SyntasticDebugLoclist, 'aggregated:', newLoclist)
        if sort_aggregated_errors
            call newLoclist.sort()
            call syntastic#log#debug(g:SyntasticDebugLoclist, 'sorted:', newLoclist)
        endif
    endif

    call newLoclist.setOwner(bufnr(''))
    call newLoclist.deploy()
endfunction " }}}2

function! s:ToggleMode() " {{{2
    call s:modemap.toggleMode()
    call s:ClearCache()
    call s:UpdateErrors(1)
    call s:modemap.echoMode()
endfunction " }}}2

"display the cached errors for this buf in the location list
function! s:ShowLocList() " {{{2
    call g:SyntasticLoclist.current().show()
endfunction " }}}2

"Emulates the :lmake command. Sets up the make environment according to the
"options given, runs make, resets the environment, returns the location list
"
"a:options can contain the following keys:
"    'makeprg'
"    'errorformat'
"
"The corresponding options are set for the duration of the function call. They
"are set with :let, so dont escape spaces.
"
"a:options may also contain:
"   'defaults' - a dict containing default values for the returned errors
"   'subtype' - all errors will be assigned the given subtype
"   'preprocess' - a function to be applied to the error file before parsing errors
"   'postprocess' - a list of functions to be applied to the error list
"   'cwd' - change directory to the given path before running the checker
"   'returns' - a list of valid exit codes for the checker
function! SyntasticMake(options) " {{{2
    call syntastic#log#debug(g:SyntasticDebugTrace, 'SyntasticMake: called with options:', a:options)

    " save options and locale env variables {{{3
    let old_shell = &shell
    let old_shellredir = &shellredir
    let old_local_errorformat = &l:errorformat
    let old_errorformat = &errorformat
    let old_cwd = getcwd()
    let old_lc_messages = $LC_MESSAGES
    let old_lc_all = $LC_ALL
    " }}}3

    call s:bashHack()

    if has_key(a:options, 'errorformat')
        let &errorformat = a:options['errorformat']
    endif

    if has_key(a:options, 'cwd')
        execute 'lcd ' . fnameescape(a:options['cwd'])
    endif

    let $LC_MESSAGES = 'C'
    let $LC_ALL = ''
    let err_lines = split(system(a:options['makeprg']), "\n", 1)
    let $LC_ALL = old_lc_all
    let $LC_MESSAGES = old_lc_messages

    call syntastic#log#debug(g:SyntasticDebugLoclist, 'checker output:', err_lines)

    if has_key(a:options, 'Preprocess')
        let err_lines = call(a:options['Preprocess'], [err_lines])
        call syntastic#log#debug(g:SyntasticDebugLoclist, 'preprocess (external):', err_lines)
    elseif has_key(a:options, 'preprocess')
        let err_lines = call('syntastic#preprocess#' . a:options['preprocess'], [err_lines])
        call syntastic#log#debug(g:SyntasticDebugLoclist, 'preprocess:', err_lines)
    endif
    lgetexpr err_lines

    let errors = deepcopy(getloclist(0))

    if has_key(a:options, 'cwd')
        execute 'lcd ' . fnameescape(old_cwd)
    endif

    silent! lolder

    " restore options {{{3
    let &errorformat = old_errorformat
    let &l:errorformat = old_local_errorformat
    let &shellredir = old_shellredir
    let &shell = old_shell
    " }}}3

    if !s:running_windows && (s:uname() =~ "FreeBSD" || s:uname() =~ "OpenBSD")
        call syntastic#util#redraw(g:syntastic_full_redraws)
    endif

    call syntastic#log#debug(g:SyntasticDebugLoclist, 'raw loclist:', errors)

    if has_key(a:options, 'returns') && index(a:options['returns'], v:shell_error) == -1
        throw 'Syntastic: checker error'
    endif

    if has_key(a:options, 'defaults')
        call s:addToErrors(errors, a:options['defaults'])
    endif

    " Add subtype info if present.
    if has_key(a:options, 'subtype')
        call s:addToErrors(errors, { 'subtype': a:options['subtype'] })
    endif

    if has_key(a:options, 'Postprocess') && !empty(a:options['Postprocess'])
        for rule in a:options['Postprocess']
            let errors = call(rule, [errors])
        endfor
        call syntastic#log#debug(g:SyntasticDebugLoclist, 'postprocess (external):', errors)
    elseif has_key(a:options, 'postprocess') && !empty(a:options['postprocess'])
        for rule in a:options['postprocess']
            let errors = call('syntastic#postprocess#' . rule, [errors])
        endfor
        call syntastic#log#debug(g:SyntasticDebugLoclist, 'postprocess:', errors)
    endif

    return errors
endfunction " }}}2

"return a string representing the state of buffer according to
"g:syntastic_stl_format
"
"return '' if no errors are cached for the buffer
function! SyntasticStatuslineFlag() " {{{2
    return g:SyntasticLoclist.current().getStatuslineFlag()
endfunction " }}}2

" }}}1

" Utilities {{{1

function! s:resolveFiletypes(...) " {{{2
    let type = a:0 ? a:1 : &filetype
    return split( get(g:syntastic_filetype_map, type, type), '\m\.' )
endfunction " }}}2

function! s:ignoreFile(filename) " {{{2
    let fname = fnamemodify(a:filename, ':p')
    for pattern in g:syntastic_ignore_files
        if fname =~# pattern
            return 1
        endif
    endfor
    return 0
endfunction " }}}2

" Skip running in special buffers
function! s:skipFile() " {{{2
    let force_skip = exists('b:syntastic_skip_checks') ? b:syntastic_skip_checks : 0
    let fname = expand('%')
    return force_skip || (&buftype != '') || !filereadable(fname) || getwinvar(0, '&diff') || s:ignoreFile(fname)
endfunction " }}}2

" Take a list of errors and add default values to them from a:options
function! s:addToErrors(errors, options) " {{{2
    for err in a:errors
        for key in keys(a:options)
            if !has_key(err, key) || empty(err[key])
                let err[key] = a:options[key]
            endif
        endfor
    endfor

    return a:errors
endfunction " }}}2

" The script changes &shellredir and &shell to stop the screen flicking when
" shelling out to syntax checkers. Not all OSs support the hacks though.
function! s:bashHack() " {{{2
    if !exists('s:bash')
        if !s:running_windows && (s:uname() !~# "FreeBSD") && (s:uname() !~# "OpenBSD")
            let s:bash =
                \ executable('/usr/local/bin/bash') ? '/usr/local/bin/bash' :
                \ executable('/bin/bash') ? '/bin/bash' : ''
        else
            let s:bash = ''
        endif
    endif

    if g:syntastic_bash_hack && s:bash != ''
        let &shell = s:bash
        let &shellredir = '&>'
    endif
endfunction " }}}2

function! s:uname() " {{{2
    if !exists('s:uname')
        let s:uname = system('uname')
        lockvar s:uname
    endif
    return s:uname
endfunction " }}}2

" }}}1

" vim: set sw=4 sts=4 et fdm=marker: