I've had Plug 'hrsh7th/cmp-path' in my plugins for ever but didn't notice until recently that I wasn't getting any filepath completion in vim!

Fuller setup instructions below the TLDR

TL;DR

Turns out I need to not be a dope and configure nvim-cmp to actually use it...

local cmp = require'cmp'

cmp.setup({
    -- removed rest of setup - see the rest in my dotfiles
  sources = cmp.config.sources({
    { name = 'path' },  -- This needs to be here!
    })
})

My Setup

For the sake of completeness here is how I currently (May 2022) configure completion in Neovim usin nvim-cmp

Plugins

I keep all my plugins in plugins.vim

call plug#begin(s:plug_dir)
Plug 'neovim/nvim-lspconfig'
Plug 'hrsh7th/cmp-nvim-lsp'
Plug 'hrsh7th/cmp-buffer'
Plug 'hrsh7th/cmp-path'
Plug 'hrsh7th/cmp-cmdline'
Plug 'hrsh7th/nvim-cmp'

" For ultisnips users.
<!-- " Plug 'SirVer/ultisnips' -->
<!-- " Plug 'quangnguyen30192/cmp-nvim-ultisnips' -->

call plug#end()

Vim Settings

My vim settings are also kept in their own file, settings.vim

set completeopt=menu,menuone,noselect

nvim-cmp configuration

I have a cmp.lua file that gets sourced in init.lua (file structure explained below) for configuring cmp.

  -- Setup nvim-cmp.
local cmp = require'cmp'

cmp.setup({
  snippet = {
    -- REQUIRED - you must specify a snippet engine
    expand = function(args)
      -- For `ultisnips` user.
      vim.fn["UltiSnips#Anon"](args.body)
    end,
  },
  window = {
      completion = cmp.config.window.bordered(),
  },
  mapping = {
    ['<Down>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Select }),
    ['<Up>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Select }),
    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.close(),
    ['<Tab>'] = cmp.mapping(cmp.mapping.select_next_item(), { 'i', 's' }),
    ['<CR>'] = cmp.mapping.confirm({
      behavior = cmp.ConfirmBehavior.Replace,
      select = true,
    })
  },
  sources = cmp.config.sources({
    { name = 'nvim_lsp' },
    { name = 'ultisnips' },
    { name = 'buffer' },
    { name = 'path' },
    { name = 'tmux' },
    })
})

The sources section is what was key for this post...

Piecing it together!

My init.vim sources plugins and then settings and then finally calls init.lua. init.lua sources my cmp.lua file and BANG! auto-completion.

More sources

hrsh7th's wiki for nvim-cmp is here and has example configs as well as a list of sources...

Don't forget to configure and not just install!

my dotfiles