ale/ale_linters/scala/scalac.vim
Bjorn Neergaard 7f0ce89d2b First pass at optimizing ale to autoload (#80)
* First pass at optimizing ale to autoload

First off, the structure/function names should be revised a bit,
but I will wait for @w0rp's input before unifying the naming style.
Second off, the docs probably need some more work, I just did some
simple find-and-replace work.

With that said, this pull brings major performance gains for ale. On my
slowest system, fully loading ale and all its code takes around 150ms.

I have moved all of ale's autoload-able code to autoload/, and in
addition, implemented lazy-loading of linters. This brings load time on
that same system down to 5ms.

The only downside of lazy loading is that `g:ale_linters` cannot be
changed at runtime; however, it also speeds up performance at runtime by
simplfying the logic greatly.

Please let me know what you think!

Closes #59

* Address Travis/Vint errors

For some reason, ale isn't running vint for me...

* Incorporate feedback, make fixes

Lazy-loading logic is much improved.

* Add header comments; remove incorrect workaround

* Remove unneeded plugin guards

* Fix lazy-loading linter logic

Set the wrong variable....

* Fix capitialization
2016-10-10 19:51:29 +01:00

59 lines
1.5 KiB
VimL

" vim: set et:
" Author: Zoltan Kalmar - https://github.com/kalmiz
" Description: Basic scala support using scalac
if exists('g:loaded_ale_linters_scala_scalac')
finish
endif
let g:loaded_ale_linters_scala_scalac = 1
function! ale_linters#scala#scalac#Handle(buffer, lines)
" Matches patterns line the following:
"
" /var/folders/5q/20rgxx3x1s34g3m14n5bq0x80000gn/T/vv6pSsy/0:26: error: expected class or object definition
let pattern = '^.\+:\(\d\+\): \(\w\+\): \(.\+\)'
let output = []
let ln = 0
for line in a:lines
let ln = ln + 1
let l:match = matchlist(line, pattern)
if len(l:match) == 0
continue
endif
let text = l:match[3]
let type = l:match[2] ==# 'error' ? 'E' : 'W'
let col = 0
if ln + 1 < len(a:lines)
let col = stridx(a:lines[ln + 1], '^')
if col == -1
let col = 0
endif
endif
" vcol is Needed to indicate that the column is a character.
call add(output, {
\ 'bufnr': a:buffer,
\ 'lnum': l:match[1] + 0,
\ 'vcol': 0,
\ 'col': col + 1,
\ 'text': text,
\ 'type': type,
\ 'nr': -1,
\})
endfor
return output
endfunction
call ale#linter#Define('scala', {
\ 'name': 'scalac',
\ 'executable': 'scalac',
\ 'output_stream': 'stderr',
\ 'command': g:ale#util#stdin_wrapper . ' .scala scalac -Ystop-after:parser',
\ 'callback': 'ale_linters#scala#scalac#Handle',
\})