Improve setting of vimfiler

fix #495
fix #496

autoload/SpaceVim.vim

@@ -502,13 +502,6 @@ function! SpaceVim#welcome() abort
   if exists('g:_spacevim_checking_flag') && g:_spacevim_checking_flag
     return
   endif
-  let f = ''
-  if argc()
-    let f = expand(argv(0))
-    if isdirectory(f)
-      exe 'lcd ' . f
-    endif
-  endif
   if exists(':Startify') == 2
     Startify
   endif
@@ -517,9 +510,6 @@ function! SpaceVim#welcome() abort
     if exists(':VimFiler') == 2 
       VimFiler
       wincmd p
-    elseif exists(':NERDTreeToggle') == 2
-      NERDTreeToggle
-      wincmd p
     endif
   endif
 endfunction

autoload/SpaceVim/autocmds.vim

@@ -70,20 +70,10 @@ function! SpaceVim#autocmds#init() abort
       autocmd FocusGained * call s:reload_touchpad_status()
     endif
     autocmd BufWritePost *.vim call s:generate_doc()
-    autocmd VimEnter * if !s:with_file() | call SpaceVim#welcome() | endif
     autocmd ColorScheme gruvbox call s:fix_gruvbox()
   augroup END
 endfunction
 
-function! s:with_file() abort
-  if !argc()
-    return 0
-  elseif isdirectory(expand(argv(0)))
-    return 0
-  else
-    return 1
-  endif
-endfunction
 function! s:reload_touchpad_status() abort
   if s:touchpadoff
     call s:disable_touchpad()

autoload/SpaceVim/layers/unite.vim

@@ -73,7 +73,7 @@ function! SpaceVim#layers#unite#plugins() abort
     endif
 
     if g:spacevim_filemanager ==# 'vimfiler'
-        call add(plugins, ['Shougo/vimfiler.vim',{'merged' : 0, 'loadconf' : 1 , 'loadconf_before' : 1}])
+        call add(plugins, ['Shougo/vimfiler.vim',{'merged' : 0, 'loadconf' : 1 , 'loadconf_before' : 1, 'on_cmd' : 'VimFiler'}])
     endif
     return plugins
 endfunction

config/main.vim

@@ -1,5 +1,32 @@
 let g:Config_Main_Home = fnamemodify(expand('<sfile>'), ':p:h:gs?\\?'.((has('win16') || has('win32') || has('win64'))?'\':'/') . '?')
 
+
+" [dir?, path]
+function! s:parser_argv() abort
+    if !argc()
+        return [1, getcwd()]
+    elseif argv(0) =~# '/$'
+        let f = expand(argv(0))
+        if isdirectory(f)
+            return [1, f]
+        else
+            return [1, getcwd()]
+        endif
+    elseif isdirectory(expand(argv(0)))
+        return [1, expand(argv(0)) ]
+    else
+        return [0]
+    endif
+endfunction
+let s:status = s:parser_argv()
+if s:status[0]
+    exe 'cd ' . s:status[1]
+    augroup SPwelcom
+        au!
+        autocmd VimEnter * call SpaceVim#welcome()
+    augroup END
+endif
+
 try
     call zvim#util#source_rc('functions.vim')
 catch