nvim: Drop neomake, QFGrep and vim-grepper

Profiling with below
nvim -c 'profile start vim.log' -c 'profile func *' -c 'q'

shows that neomake adds to the start up time. Currently we only use it
for two tasks. Running hlint for Haskell and stack build asynchronously.

Use asyncdo and define a generic wrapper command for running makeprg
asynchronously. This can be used for anything as long as makeprg is
set correctly.

vim-grepper also adds somewhat to the startup time though not much. We
do not need the functionality of switching between grep tools. Here
again just use asyncdo and define a generic command for running grepprg
asynchronously.

Drop QFGrep as we can use in built Cfilter plugin for filtering the
quickfix list.

Note that all start times mentioned above are a few milliseconds not
even more than 5ms. However, we would like to be as fast as possible
and use in built functions.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.config/nvim/after/ftplugin/haskell.vim

@@ -4,9 +4,8 @@ compiler stack
 setlocal makeprg=stack\ build
 setlocal keywordprg=:Hoogle
 
-nmap <buffer> <LocalLeader>b  :Neomake!<CR>
+nmap <buffer> <LocalLeader>t  :AsyncDo stack exec -- hasktags -x -c .<CR>
-nmap <buffer> <LocalLeader>t  :NeomakeSh stack exec -- hasktags -x -c .<CR>
+nmap <buffer> <LocalLeader>td :AsyncDo stack exec -- haskdogs<CR>
-nmap <buffer> <LocalLeader>td :NeomakeSh stack exec -- haskdogs<CR>
 nmap <buffer> <LocalLeader>g  :Ghcid<CR>
 nmap <buffer> <LocalLeader>k  :GhcidKill<CR>
 nmap <buffer> <LocalLeader>c  :HoogleClose<CR>

nvim/.config/nvim/after/ftplugin/qf.vim

@@ -1,9 +1,11 @@
-setlocal norelativenumber
+setlocal nolist norelativenumber nowrap number nocursorline
+setlocal scrolloff=0
 
 noremap <silent><buffer> p :call quickui#tools#preview_quickfix()<CR>
 
-noremap <buffer> [- :colder<CR>
+nnoremap <buffer> [- :colder<CR>
-noremap <buffer> ]+ :cnewer<CR>
+nnoremap <buffer> ]+ :cnewer<CR>
+nnoremap <buffer> <Leader>g :Cfilter<SPACE>
 
 " Close QF window if it is last window
 autocmd WinEnter * if winnr('$') == 1 && &buftype == "quickfix" | q | endif

nvim/.config/nvim/autocmd.vim

@@ -22,3 +22,8 @@ augroup UserStatusline
   autocmd ColorScheme * hi User7 guifg=Gray guibg=Black
   autocmd ColorScheme * hi User8 guifg=DarkYellow guibg=Black
 augroup END
+
+augroup QfAlwaysBottom
+  autocmd!
+  autocmd FileType qf wincmd J
+augroup END

nvim/.config/nvim/config.vim

@@ -94,5 +94,8 @@ let g:loaded_tarPlugin        = 1
 let g:loaded_vimballPlugin    = 1
 let g:loaded_zipPlugin        = 1
 
+" Add the in built Cfilter plugin. Replaces QFGrep.
+packadd cfilter
+
 " Colorscheme
 colorscheme molokai

nvim/.config/nvim/init.vim

@@ -31,14 +31,13 @@ Plug 'vim-utils/vim-husk'
 Plug 'sakhnik/nvim-gdb', { 'do': ':UpdateRemotePlugins' }
 " Rainbow Parentheses
 Plug 'luochen1990/rainbow'
-" Neo/Async stuff
+" Formatting
 Plug 'sbdchd/neoformat'
-Plug 'neomake/neomake'
+" Run things async
+Plug 'hauleth/asyncdo.vim'
 " Quickfix
-Plug 'sk1418/QFGrep'
 Plug 'ronakg/quickr-cscope.vim'
 Plug 'stefandtw/quickfix-reflector.vim'
-Plug 'mhinz/vim-grepper'
 Plug 'milkypostman/vim-togglelist'
 Plug 'skywind3000/vim-quickui'
 Plug 'yssl/QFEnter'

nvim/.config/nvim/keymappings.vim

@@ -11,6 +11,9 @@ nnoremap Q <Nop>
 nnoremap <Leader>o :call GotoJump()<CR>
 nnoremap <Leader>; :changes<CR>:keepjumps norm g;<Left><Left>
 nnoremap <Leader>, :changes<CR>:keepjumps norm g,<Left><Left>
+" Async Make mappings
+nnoremap <LocalLeader>b :Make<CR>
+nnoremap <LocalLeader>B :LMake<CR>
 
 " For Fuzzy
 nnoremap <Leader>b   :Buffers<CR>
@@ -90,16 +93,6 @@ omap ih <Plug>(GitGutterTextObjectInnerPending)
 omap ah <Plug>(GitGutterTextObjectOuterPending)
 xmap ih <Plug>(GitGutterTextObjectInnerVisual)
 xmap ah <Plug>(GitGutterTextObjectOuterVisual)
-" For Neomake/Neoformat
-nnoremap <Leader>nm  :Neomake<CR>
-nnoremap <Leader>nc  :NeomakeClean<CR>
-nnoremap <Leader>ns  :NeomakeSh<SPACE>
-nnoremap <Leader>njl :NeomakeListJobs<CR>
-nnoremap <Leader>nja :NeomakeCancelJobs<CR>
-nnoremap <Leader>njc :NeomakeCancelJob<SPACE>
-nnoremap <Leader>nf  :Neoformat<CR>
-nnoremap <Leader>ne  :NeomakeEnable<CR>
-nnoremap <Leader>nd  :NeomakeDisable<CR>
 " For workspace
 nnoremap <Leader>ws  :ToggleWorkspace<CR>
 " Quickfix & Location list mappings
@@ -109,8 +102,8 @@ nnoremap [q :cprevious<CR>
 nnoremap ]q :cnext<CR>
 nnoremap [Q :cfirst<CR>
 nnoremap ]Q :clast<CR>
-nnoremap qs :Grepper -nojump -query<SPACE>
+nnoremap qs :Grep<SPACE>
-nnoremap q* :Grepper -nojump -cword<CR>
+nnoremap q* :Grep <cword><CR>
 nnoremap qt :call ToggleQuickfixList()<CR>
 nnoremap Lo :lopen<CR>
 nnoremap Lc :lclose<CR>
@@ -118,8 +111,8 @@ nnoremap [l :lprevious<CR>
 nnoremap ]l :lnext<CR>
 nnoremap [L :lfirst<CR>
 nnoremap ]L :llast<CR>
-nnoremap Ls :Grepper -nojump -noquickfix -query<SPACE>
+nnoremap Ls :LGrep<SPACE>
-nnoremap L* :Grepper -nojump -noquickfix -cword<CR>
+nnoremap L* :LGrep <cword><CR>
 nnoremap Lt :call ToggleLocationList()<CR>
 " Preview tags
 nnoremap pt :ptag <C-R><C-W><CR>
@@ -173,3 +166,6 @@ nnoremap <BS> <C-^>
 " Map to ; to : for easy access to command mode. Behaviour of ; can be taken
 " care of by f due to clever-f
 nnoremap ; :
+" Asynchronous make
+command! -bang -nargs=* -complete=file Make call asyncdo#run(<bang>0, &makeprg, <f-args>)
+command! -bang -nargs=* -complete=file LMake call asyncdo#lrun(<bang>0, &makeprg, <f-args>)

nvim/.config/nvim/plugin/grepper.vim

@@ -0,0 +1,19 @@
+if executable('rg')
+  set grepprg=rg\ --vimgrep\ --no-heading\ --smart-case
+  set grepformat=%f:%l:%c:%m,%f:%l%m,%f\ \ %l%m
+elseif executable('ag')
+  set grepprg=ag\ --nogroup\ --nocolor\ --vimgrep
+  set grepformat^=%f:%l:%c:%m
+endif
+
+" Taken from https://github.com/hauleth/dotfiles/blob/master/vim/.config/nvim/init.vim
+command! -bang -nargs=* -complete=dir Grep call asyncdo#run(<bang>0,
+      \ { 'job': &grepprg, 'errorformat': &grepformat }, <f-args>)
+command! -bang -nargs=* -complete=dir LGrep call asyncdo#lrun(<bang>0,
+      \ { 'job': &grepprg, 'errorformat': &grepformat }, <f-args>)
+
+augroup GrepperQFOpen
+  autocmd!
+  autocmd QuickFixCmdPost [^l]* nested cwindow
+  autocmd QuickFixCmdPost    l* nested lwindow
+augroup END