Core: cleanup buffer handling (stage 2).

autoload/syntastic/log.vim

@@ -21,7 +21,7 @@ function! syntastic#log#warn(msg) abort " {{{2
 endfunction " }}}2
 
 function! syntastic#log#error(msg) abort " {{{2
-    execute "normal \<Esc>"
+    execute 'normal! \<Esc>'
     echohl ErrorMsg
     echomsg 'syntastic: error: ' . a:msg
     echohl None

autoload/syntastic/util.vim

@@ -102,6 +102,10 @@ function! syntastic#util#rmrf(what) abort " {{{2
     endif
 endfunction " }}}2
 
+function! syntastic#util#getbufvar(buf, name, ...) abort " {{{2
+    return a:0 ? s:_getbufvar(a:buf, a:name, a:1) : getbufvar(a:buf, a:name)
+endfunction " }}}2
+
 " Search the first 5 lines of the file for a magic number and return a map
 " containing the args and the executable
 "
@@ -126,6 +130,16 @@ function! syntastic#util#parseShebang() abort " {{{2
     return { 'exe': '', 'args': [] }
 endfunction " }}}2
 
+" Get the value of a Vim variable.  Allow buffer variables to override global ones.
+function! syntastic#util#bufRawVar(buf, name, ...) abort " {{{2
+    return s:_getbufvar(a:buf, a:name, get(g:, a:name, a:0 > 0 ? a:1 : ''))
+endfunction "}}}2
+
+" Get the value of a syntastic variable.  Allow buffer variables to override global ones.
+function! syntastic#util#bufVar(buf, name, ...) abort " {{{2
+    return call('syntastic#util#bufRawVar', [a:buf, 'syntastic_' . a:name] + a:000)
+endfunction "}}}2
+
 " Get the value of a Vim variable.  Allow local variables to override global ones.
 function! syntastic#util#rawVar(name, ...) abort " {{{2
     return get(b:, a:name, get(g:, a:name, a:0 > 0 ? a:1 : ''))
@@ -165,11 +179,6 @@ function! syntastic#util#compareLexi(a, b) abort " {{{2
     return 0
 endfunction " }}}2
 
-" strwidth() was added in Vim 7.3; if it doesn't exist, we use strlen()
-" and hope for the best :)
-let s:_width = function(exists('*strwidth') ? 'strwidth' : 'strlen')
-lockvar s:_width
-
 function! syntastic#util#screenWidth(str, tabstop) abort " {{{2
     let chunks = split(a:str, "\t", 1)
     let width = s:_width(chunks[-1])
@@ -391,9 +400,6 @@ function! syntastic#util#setWids() abort " {{{2
     endfor
 endfunction " }}}2
 
-let s:_str2float = function(exists('*str2float') ? 'str2float' : 'str2nr')
-lockvar s:_str2float
-
 function! syntastic#util#str2float(val) abort " {{{2
     return s:_str2float(a:val)
 endfunction " }}}2
@@ -515,6 +521,11 @@ function! s:_translateElement(key, term) abort " {{{2
     return ret
 endfunction " }}}2
 
+" strwidth() was added in Vim 7.3; if it doesn't exist, we use strlen()
+" and hope for the best :)
+let s:_width = function(exists('*strwidth') ? 'strwidth' : 'strlen')
+lockvar s:_width
+
 " @vimlint(EVL103, 1, a:flags)
 function! s:_delete_dumb(what, flags) abort " {{{2
     if !exists('s:rmrf')
@@ -561,6 +572,9 @@ function! s:_rmrf(what) abort " {{{2
     endif
 endfunction " }}}2
 
+let s:_str2float = function(exists('*str2float') ? 'str2float' : 'str2nr')
+lockvar s:_str2float
+
 function! s:_float2str_smart(val) abort " {{{2
     return printf('%.1f', a:val)
 endfunction " }}}2
@@ -572,6 +586,18 @@ endfunction " }}}2
 let s:_float2str = function(has('float') ? 's:_float2str_smart' : 's:_float2str_dumb')
 lockvar s:_float2str
 
+function! s:_getbufvar_dumb(buf, name, ...) abort " {{{2
+    let ret = getbufvar(a:buf, a:name)
+    if a:0 > 0 && ret ==# ''
+        unlet! ret
+        let ret = a:1
+    endif
+    return ret
+endfunction "}}}2
+
+let s:_getbufvar = function(v:version > 703 || (v:version == 703 && has('patch831')) ? 'getbufvar' : 's:_getbufvar_dumb')
+lockvar s:_getbufvar
+
 " }}}1
 
 let &cpo = s:save_cpo

plugin/syntastic.vim

@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.7.0-226'
+let g:_SYNTASTIC_VERSION = '3.7.0-227'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1
@@ -136,9 +136,9 @@ let s:_DEBUG_DUMP_OPTIONS = [
         \ 'shellxquote'
     \ ]
 for s:feature in [
-        \ 'shellxescape',
-        \ 'shellslash',
         \ 'autochdir',
+        \ 'shellslash',
+        \ 'shellxescape',
     \ ]
 
     if exists('+' . s:feature)

plugin/syntastic/checker.vim

@@ -15,7 +15,7 @@ function! g:SyntasticChecker.New(args, ...) abort " {{{2
 
     if a:0
         " redirected checker
-        let newObj._exec = get(a:args, 'exec', a:1['_exec'])
+        let newObj._exec_default = get(a:args, 'exec', a:1['_exec'])
 
         let filetype = a:1['_filetype']
         let name = a:1['_name']
@@ -31,7 +31,7 @@ function! g:SyntasticChecker.New(args, ...) abort " {{{2
             let newObj._enable = a:1['_enable']
         endif
     else
-        let newObj._exec = get(a:args, 'exec', newObj._name)
+        let newObj._exec_default = get(a:args, 'exec', newObj._name)
         let prefix = 'SyntaxCheckers_' . newObj._filetype . '_' . newObj._name . '_'
 
         if has_key(a:args, 'enable')
@@ -69,17 +69,9 @@ endfunction " }}}2
 " automatically, but you should keep still this in mind if you change the
 " current checker workflow.
 function! g:SyntasticChecker.syncExec() abort " {{{2
-    let user_exec =
-        \ expand( exists('b:syntastic_' . self._name . '_exec') ? b:syntastic_{self._name}_exec :
-        \ syntastic#util#var(self._filetype . '_' . self._name . '_exec'), 1 )
-
-    if user_exec !=# '' && user_exec !=# self._exec
-        let self._exec = user_exec
-        if has_key(self, '_available')
-            " we have a new _exec on the block, it has to be validated
-            call remove(self, '_available')
-        endif
-    endif
+    let suffix = self._name . '_exec'
+    let user_exec = expand( syntastic#util#var(self._filetype . '_' . suffix, syntastic#util#var(suffix)), 1 )
+    let self._exec = user_exec !=# '' ? user_exec : self._exec_default
 endfunction " }}}2
 
 function! g:SyntasticChecker.getExec() abort " {{{2
@@ -187,10 +179,15 @@ endfunction " }}}2
 
 function! g:SyntasticChecker.isAvailable() abort " {{{2
     call self.syncExec()
+
     if !has_key(self, '_available')
-        let self._available = self._isAvailableFunc()
+        let self._available = {}
     endif
-    return self._available
+    if !has_key(self._available, self._exec)
+        let self._available[self._exec] = self._isAvailableFunc()
+    endif
+
+    return self._available[self._exec]
 endfunction " }}}2
 
 function! g:SyntasticChecker.isDisabled() abort " {{{2

plugin/syntastic/loclist.vim

@@ -29,7 +29,7 @@ endfunction " }}}2
 
 function! g:SyntasticLoclist.current(...) abort " {{{2
     let buf = a:0 > 1 ? a:1 : bufnr('')
-    let loclist = getbufvar(buf, 'syntastic_loclist')
+    let loclist = syntastic#util#getbufvar(buf, 'syntastic_loclist', {})
     if type(loclist) != type({}) || empty(loclist)
         unlet! loclist
         let loclist = g:SyntasticLoclist.New([])