nvim: Switch to completion-nvim and drop deoplete

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

nvim/.config/nvim/after/ftplugin/python.vim

@@ -9,7 +9,7 @@ let g:jedi#rename_command = "gr"
 
 let g:jedi#auto_initialization = 1
 let g:jedi#auto_vim_configuration = 0
-let g:jedi#use_tabs_not_buffers = 1
+let g:jedi#use_tabs_not_buffers = 0
 let g:jedi#popup_on_dot = 1
 let g:jedi#popup_select_first = 0
 let g:jedi#smart_auto_mappings = 0
@@ -17,6 +17,4 @@ let g:jedi#show_call_signatures = "2"
 let g:jedi#show_call_signatures_delay = 0
 let g:jedi#show_call_signatures_modes = 'i'
 let g:jedi#enable_speed_debugging = 0
-let g:jedi#completions_enabled = 0
-
-
+let g:jedi#completions_enabled = 1

nvim/.config/nvim/after/ftplugin/rust.vim

@@ -1,8 +1,8 @@
-nmap <buffer> gd <Plug>DeopleteRustGoToDefinitionDefault
-nmap <buffer> K  <Plug>DeopleteRustShowDocumentation
-nmap <buffer> gv <Plug>DeopleteRustGoToDefinitionVSplit
-nmap <buffer> gh <Plug>DeopleteRustGoToDefinitionSplit
-nmap <buffer> gt <Plug>DeopleteRustGoToDefinitionTab
+nmap <buffer> gd <Plug>(rust-def)
+nmap <buffer> K  <Plug>(rust-doc)
+nmap <buffer> gv <Plug>(rust-def-vertical)
+nmap <buffer> gh <Plug>(rust-def-split)
+nmap <buffer> gt <Plug>(rust-def-tab)
 
 augroup rust_maps
   au!
@@ -16,4 +16,3 @@ augroup rust_maps
   au FileType rust au BufEnter let s:quitting = 0
   au FileType rust au BufWritePost if ! s:quitting | Neomake | else | echom "Neomake disabled" | endif
 augroup END
-

nvim/.config/nvim/autocmd.vim

@@ -27,3 +27,6 @@ augroup QfAlwaysBottom
   autocmd!
   autocmd FileType qf wincmd J
 augroup END
+
+" Use completion-nvim in every buffer
+autocmd BufEnter * lua require'completion'.on_attach()

nvim/.config/nvim/init.vim

@@ -12,9 +12,7 @@ Plug 'axelf4/vim-strip-trailing-whitespace'
 " Manage Project sessions
 Plug 'thaerkh/vim-workspace'
 " For autocompletion
-Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
-Plug 'Shougo/neco-syntax'
-Plug 'deoplete-plugins/deoplete-tag'
+Plug 'haorenW1025/completion-nvim'
 " For tmux
 Plug 'tmux-plugins/vim-tmux-focus-events'
 Plug 'wellle/tmux-complete.vim'
@@ -76,7 +74,7 @@ Plug 'godlygeek/tabular', { 'for': 'haskell' }
 Plug 'ndmitchell/ghcid', { 'rtp': 'plugins/nvim' }
 " Rust
 Plug 'rust-lang/rust.vim', { 'for': 'rust' }
-Plug 'sebastianmarkow/deoplete-rust', { 'for': 'rust' }
+Plug 'racer-rust/vim-racer', { 'for': 'rust' }
 " Purescript
 Plug 'purescript-contrib/purescript-vim'
 Plug 'frigoeu/psc-ide-vim'
@@ -92,7 +90,6 @@ Plug 'vim-erlang/vim-erlang-omnicomplete', { 'for': 'erlang' }
 Plug 'vim-erlang/vim-erlang-compiler', { 'for': 'erlang' }
 " Python
 Plug 'vim-python/python-syntax'
-Plug 'deoplete-plugins/deoplete-jedi'
 Plug 'davidhalter/jedi-vim', { 'for': 'python' }
 " C/C++
 Plug 'vim-jp/vim-cpp'

nvim/.config/nvim/plugin_settings.vim

@@ -71,29 +71,3 @@ let g:cpp_concepts_highlight = 1
 let g:markify_error_text = 'E'
 let g:markify_warning_text = 'W'
 let g:markify_info_text = 'I'
-
-" Deoplete
-let g:deoplete#enable_at_startup = 0
-let g:deoplete#sources#rust#disable_keymap = 1
-let g:deoplete#sources#rust#racer_binary=expand('$HOME/.cargo/bin/racer')
-let g:deoplete#sources#rust#rust_source_path=expand('$HOME/GitSources/rust/src')
-let g:deoplete#sources = {}
-call deoplete#custom#source('_', 'disabled_syntaxes', ['Comment', 'String'])
-call deoplete#custom#option('sources', {
-      \ '_' : ['buffer', 'omni', 'around', 'file', 'member'],
-      \ 'haskell': ['tag', 'buffer', 'omni'],
-      \ 'c': ['tag', 'buffer'],
-      \ 'purescript': ['buffer', 'omni'],
-      \ 'rust': ['racer', 'buffer'],
-      \})
-call deoplete#custom#source('omni', 'functions', {
-      \ 'purescript':  'PSCIDEComplete',
-      \})
-call deoplete#custom#var('omni', 'input_patterns', {
-      \ 'purescript': '\w*',
-      \})
-call deoplete#custom#option({
-      \ 'auto_complete_delay': 200,
-      \ 'auto_complete': v:true,
-      \ 'smart_case': v:true,
-      \ })