fix(buffer): fix vim#buffer api

autoload/SpaceVim.vim

@@ -2007,8 +2007,9 @@ function! SpaceVim#begin() abort
   endif
   if has('nvim-0.7')
     try
-      " @fixme unknown font error
-      lua require('spacevim.default').options()
+      " https://github.com/vim/vim/issues/7191
+      " patch 8.2.1908: Lua is initialized even when not used
+      silent! lua require('spacevim.default').options()
     catch
 
     endtry

autoload/SpaceVim/api/vim/buffer.vim

@@ -321,6 +321,39 @@ EOF
   call setbufvar(a:buffer,'&ma', ma)
 endfunction
 
+function! s:self.buf_set_lines2(buffer, start, end, strict_indexing, replacement) abort
+  if !bufexists(a:buffer)
+    return
+  endif
+  let ma = getbufvar(a:buffer, '&ma')
+  call setbufvar(a:buffer,'&ma', 1)
+  " if the function `nvim_buf_set_lines` exists
+  exe 'b' . a:buffer
+  let lct = line('$')
+  if a:start > lct
+    return
+  elseif a:start >= 0 && a:end > a:start
+    let endtext = a:end >= lct ? [] : getline(a:end + 1, '$')
+    " 0 start end $
+    if len(a:replacement) == a:end - a:start
+      for i in range(a:start, len(a:replacement) + a:start - 1)
+        call setline(i + 1, a:replacement[i - a:start])
+      endfor
+    else
+      let replacement = a:replacement + endtext
+      for i in range(a:start, len(replacement) + a:start - 1)
+        call setline(i + 1, replacement[i - a:start])
+      endfor
+    endif
+  elseif a:start >= 0 && a:end < 0 && lct + a:end > a:start
+    call self.buf_set_lines(a:buffer, a:start, lct + a:end + 1, a:strict_indexing, a:replacement)
+  elseif a:start <= 0 && a:end > a:start && a:end < 0 && lct + a:start >= 0
+    call self.buf_set_lines(a:buffer, lct + a:start + 1, lct + a:end + 1, a:strict_indexing, a:replacement)
+  endif
+  call setbufvar(a:buffer,'&ma', ma)
+
+endfunction
+
 
 function! s:self.displayArea() abort
   return [

autoload/SpaceVim/layers.vim

@@ -66,7 +66,7 @@ let s:CMP = SpaceVim#api#import('vim#compatible')
 function! SpaceVim#layers#load(layer, ...) abort
   if a:layer ==# '-l'
     if has('nvim')
-      lua require('spacevim.layer').load('-l')
+      silent! lua require('spacevim.layer').load('-l')
     else
       call s:list_layers()
     endif

test/api/vim/buffer.vader

@@ -6,21 +6,23 @@ Execute ( SpaceVim api: vim#buffer open ):
 
 Execute ( SpaceVim api: vim#buffer buf_set_lines):
   let buffer = SpaceVim#api#import('vim#buffer')
+  Log 'has("nvim"):' . has('nvim')
   Log 'if_py:' . has('python')
   Log 'if_py3:' .  has('python3')
+  Log 'if_lua:' . has('lua')
+  Log 'spacevim_if_lua:' . get(g:, '_spacevim_if_lua', 0)
   let nr = buffer.bufadd('')
   call setbufvar(nr, '&buftype', 'nofile')
   call setbufvar(nr, '&buflisted', 0)
-  Log 'The value of g:_spacevim_if_lua is ' . get(g:, '_spacevim_if_lua', 0)
-  call buffer.buf_set_lines(nr, 0, 1, 0, ['line 1', 'line 2', 'line 3', 'line 4'])
+  call buffer.buf_set_lines2(nr, 0, 1, 0, ['line 1', 'line 2', 'line 3', 'line 4'])
   AssertEqual getbufline(nr, 1, '$'), ['line 1', 'line 2', 'line 3', 'line 4']
-  call buffer.buf_set_lines(nr, 1, 3, 0, ['replace 1', 'replace 2', 'replace 3'])
+  call buffer.buf_set_lines2(nr, 1, 3, 0, ['replace 1', 'replace 2', 'replace 3'])
   AssertEqual getbufline(nr, 1, '$'), ['line 1', 'replace 1', 'replace 2', 'replace 3', 'line 4']
-  call buffer.buf_set_lines(nr, -3, -1, 0, ['replace 1', 'replace 2', 'replace 3'])
+  call buffer.buf_set_lines2(nr, -3, -1, 0, ['replace 1', 'replace 2', 'replace 3'])
   AssertEqual getbufline(nr, 1, '$'), ['line 1', 'replace 1', 'replace 2', 'replace 1', 'replace 2', 'replace 3']
-  call buffer.buf_set_lines(nr, 2, -2, 0, ['replace 1', 'replace 2', 'replace 3'])
+  call buffer.buf_set_lines2(nr, 2, -2, 0, ['replace 1', 'replace 2', 'replace 3'])
   AssertEqual getbufline(nr, 1, '$'), ['line 1', 'replace 1', 'replace 1', 'replace 2', 'replace 3', 'replace 3']
-  call buffer.buf_set_lines(nr, 0, -1, 0, ['xx 1'])
+  call buffer.buf_set_lines2(nr, 0, -1, 0, ['xx 1'])
   AssertEqual getbufline(nr, 1, '$'), ['xx 1']
   exe 'bd!' nr
   unlet nr