dotfiles/neovim/.config/nvim/lua/cmp-lsp.lua

--configure nvim-cmp for use with lsp and luasnip.

-- Add additional capabilities supported by nvim-cmp
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)

local luasnip = require 'luasnip'

local lspconfig = require('lspconfig')

-- Enable some language servers with the additional completion capabilities offered by nvim-cmp
local servers = {'texlab', 'rust_analyzer', 'pyright'}
for _, lsp in ipairs(servers) do
	lspconfig[lsp].setup {
		-- on_attach = my_custom_on_attach,
		capabilities = capabilities,
	}
end

-- Set completeopt to have a better completion experience
vim.o.completeopt='menu,menuone,preview,noinsert'

-- nvim-cmp setup
local cmp = require 'cmp'
cmp.setup {
	snippet = {
		expand = function(args)
			require('luasnip').lsp_expand(args.body)
		end,
	},
	mapping = {
		['<C-p>'] = cmp.mapping.select_prev_item(),
		['<C-n>'] = cmp.mapping.select_next_item(),
		['<C-d>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-Space>'] = cmp.mapping.complete(),
		['<C-e>'] = cmp.mapping.close(),
		['<CR>'] = cmp.mapping.confirm {
			behavior = cmp.ConfirmBehavior.Replace,
			select = false,
		},
		['<Tab>'] = function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			else
				fallback()
			end
		end,
		['<S-Tab>'] = function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end,
	},
	sources = {
		{ name = 'nvim_lsp' },
		{ name = 'path' },
		{ name = 'luasnip' },
		{ name = 'buffer' },
		{ name = 'dictionary' },
		{ name = 'spell' },
		{ name = 'nvim_lsp_signature_help' },
		{ name = 'emoji' },
		{ name = 'latex_symbols' },
		-- { name = 'digraphs' },
	},
}

cmp.setup.cmdline(':', {
  sources = {
    { name = 'cmdline' }
  }
})

cmp.setup.cmdline('/', {
	sources = cmp.config.sources({
		{ name = 'nvim_lsp_document_symbol' },
		{ name = 'treesitter' },
	}, {
		-- { name = 'buffer' }
	})
})