nvim: Switch to ferret & drop our bare bones grepper

See ferret's README for the advantages.

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

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

@@ -1,5 +1,3 @@
-" Always open QF window at the bottom
-wincmd J
 " Quit vim if the last window is qf
 autocmd BufEnter <buffer> if winnr('$') < 2| q | endif
 

nvim/.config/nvim/init.vim

@@ -1,11 +1,12 @@
 call plug#begin('~/.config/nvim/plugged')
 
-" Motions
-Plug 'haya14busa/incsearch.vim'
+" Vertical Motion
 Plug 'justinmk/vim-sneak'
-" Fuzzy search
+" Search
 Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
 Plug 'junegunn/fzf.vim'
+Plug 'haya14busa/incsearch.vim'
+Plug 'wincent/ferret'
 " Remove extraneous whitespace when edit mode is exited
 Plug 'axelf4/vim-strip-trailing-whitespace'
 " Manage Project sessions
@@ -32,7 +33,6 @@ Plug 'sbdchd/neoformat'
 Plug 'hauleth/asyncdo.vim'
 " Quickfix
 Plug 'ronakg/quickr-cscope.vim'
-Plug 'stefandtw/quickfix-reflector.vim'
 Plug 'milkypostman/vim-togglelist'
 Plug 'yssl/QFEnter'
 " Text Object plugins

nvim/.config/nvim/keymappings.vim

@@ -73,10 +73,8 @@ nnoremap [q :cprevious<CR>
 nnoremap ]q :cnext<CR>
 nnoremap [Q :cfirst<CR>
 nnoremap ]Q :clast<CR>
-nnoremap qs :Grep<SPACE>
-nnoremap q* :Grep <cword><CR>
-nnoremap qg :Ggrep! <cword><CR>
-nnoremap qG :Ggrep!<SPACE>
+nnoremap q* :Ggrep! <cword><CR>
+nnoremap qs :Ggrep!<SPACE>
 nnoremap qt :call ToggleQuickfixList()<CR>
 nnoremap Lo :lopen<CR>
 nnoremap Lc :lclose<CR>
@@ -84,10 +82,8 @@ nnoremap [l :lprevious<CR>
 nnoremap ]l :lnext<CR>
 nnoremap [L :lfirst<CR>
 nnoremap ]L :llast<CR>
-nnoremap Ls :LGrep<SPACE>
-nnoremap L* :LGrep <cword><CR>
-nnoremap Lg :Glgrep! <cword><CR>
-nnoremap LG :Glgrep!<SPACE>
+nnoremap L* :Glgrep! <cword><CR>
+nnoremap Ls :Glgrep!<SPACE>
 nnoremap Lt :call ToggleLocationList()<CR>
 " Preview tags
 nnoremap pt :ptag <C-R><C-W><CR>

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

@@ -1,19 +0,0 @@
-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