nvim: Add buffers as a completion source for completion-nvim

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

nvim/.config/nvim/init.vim

@@ -14,6 +14,7 @@ Plug 'axelf4/vim-strip-trailing-whitespace'
 Plug 'thaerkh/vim-workspace'
 " For autocompletion
 Plug 'nvim-lua/completion-nvim'
+Plug 'steelsojka/completion-buffers'
 " For tmux
 Plug 'tmux-plugins/vim-tmux-focus-events'
 Plug 'wellle/tmux-complete.vim'

nvim/.config/nvim/plugin_settings.vim

@@ -65,6 +65,7 @@ let g:completion_enable_auto_popup = 1
 let g:completion_auto_change_source = 1
 let g:completion_chain_complete_list = {
   \ 'c': [
+  \    {'complete_items': ['buffers']},
   \    {'mode': 'keyn'},
   \    {'mode': 'tags'},
   \    {'mode': '<c-p>'},
@@ -72,21 +73,25 @@ let g:completion_chain_complete_list = {
   \],
   \ 'haskell': [
   \    {'complete_items': ['lsp']},
+  \    {'complete_items': ['buffers']},
   \    {'mode': 'keyn'},
   \    {'mode': '<c-p>'},
   \    {'mode': '<c-n>'},
   \],
   \ 'rust': [
   \    {'complete_items': ['lsp']},
+  \    {'complete_items': ['buffers']},
   \    {'mode': 'keyn'}
   \],
   \ 'purescript': [
   \    {'complete_items': ['lsp']},
+  \    {'complete_items': ['buffers']},
   \    {'mode': 'keyn'},
   \    {'mode': '<c-p>'},
   \    {'mode': '<c-n>'}
   \],
   \ 'default': [
+  \    {'complete_items': ['buffers']},
   \    {'mode': 'keyn'},
   \    {'mode': '<c-p>'},
   \    {'mode': '<c-n>'},