nvim-config/after/plugin/lsp.lua

local Remap = require("serxoz.keymap")
local nnoremap = Remap.nnoremap
local inoremap = Remap.inoremap

-- local sumneko_root_path = "/home/mpaulson/personal/sumneko"
-- local sumneko_binary = sumneko_root_path .. "/bin/lua-language-server"

-- Setup nvim-cmp.
local cmp = require("cmp")
local source_mapping = {
	buffer = "[Buffer]",
	nvim_lsp = "[LSP]",
	nvim_lua = "[Lua]",
	path = "[Path]",
}
local lspkind = require("lspkind")

cmp.setup({
	snippet = {
		expand = function(args)
			-- For `vsnip` user.
			-- vim.fn["vsnip#anonymous"](args.body)

			-- For `luasnip` user.
			require("luasnip").lsp_expand(args.body)

			-- For `ultisnips` user.
			-- vim.fn["UltiSnips#Anon"](args.body)
		end,
	},
	mapping = cmp.mapping.preset.insert({
        ['<C-y>'] = cmp.mapping.confirm({ select = true }),
		["<C-u>"] = cmp.mapping.scroll_docs(-4),
		["<C-d>"] = cmp.mapping.scroll_docs(4),
		["<C-Space>"] = cmp.mapping.complete(),
	}),

	formatting = {
		format = function(entry, vim_item)
			vim_item.kind = lspkind.presets.default[vim_item.kind]
			local menu = source_mapping[entry.source.name]
			vim_item.menu = menu
			return vim_item
		end,
	},

	sources = {
		{ name = "nvim_lsp" },

		-- For vsnip user.
		-- { name = 'vsnip' },

		-- For luasnip user.
		{ name = "luasnip" },

		-- For ultisnips user.
		-- { name = 'ultisnips' },

		{ name = "buffer" },
	},
})

local function config(_config)
	return vim.tbl_deep_extend("force", {
		on_attach = function()
			nnoremap("gd", function() vim.lsp.buf.definition() end)
			nnoremap("K", function() vim.lsp.buf.hover() end)
			nnoremap("<leader>vws", function() vim.lsp.buf.workspace_symbol() end)
			nnoremap("<leader>vd", function() vim.diagnostic.open_float() end)
			nnoremap("[d", function() vim.diagnostic.goto_next() end)
			nnoremap("]d", function() vim.diagnostic.goto_prev() end)
			nnoremap("<leader>vca", function() vim.lsp.buf.code_action() end)
			nnoremap("<leader>vco", function() vim.lsp.buf.code_action({
                filter = function(code_action)
                    if not code_action or not code_action.data then
                        return false
                    end

                    local data = code_action.data.id
                    return string.sub(data, #data - 1, #data) == ":0"
                end,
                apply = true
            }) end)
			nnoremap("<leader>vrr", function() vim.lsp.buf.references() end)
			nnoremap("<leader>vrn", function() vim.lsp.buf.rename() end)
			inoremap("<C-h>", function() vim.lsp.buf.signature_help() end)
		end,
	}, _config or {})
end

require("lspconfig").zls.setup(config())

require("lspconfig").tsserver.setup(config())

require("lspconfig").ccls.setup(config())

require("lspconfig").jedi_language_server.setup(config())

require("lspconfig").svelte.setup(config())

require("lspconfig").solang.setup(config())

require("lspconfig").cssls.setup(config())

require("lspconfig").gopls.setup(config({
	cmd = { "gopls", "serve" },
	settings = {
		gopls = {
			analyses = {
				unusedparams = true,
			},
			staticcheck = true,
		},
	},
}))

-- who even uses this?
require("lspconfig").rust_analyzer.setup(config({
	-- cmd = { "rustup", "run", "rust-analyzer" },
	cmd = { "rust-analyzer" },
	[[
	    settings = {
	        rust = {
	            unstable_features = true,
	            build_on_save = false,
	            all_features = true,
	        },
            ["rust-analyzer"] = {
                diagnostics = {
                    enable = true,
                    disabled = {"unresolved-proc-macro"},
                    enableExperimental = true,
                },
            },
	    }
	]]
}))

--require("lspconfig").sumneko_lua.setup(config({
--	cmd = { sumneko_binary, "-E", sumneko_root_path .. "/main.lua" },
--	settings = {
--		Lua = {
--			runtime = {
--				-- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
--				version = "LuaJIT",
--				-- Setup your lua path
--				path = vim.split(package.path, ";"),
--			},
--			diagnostics = {
--				-- Get the language server to recognize the `vim` global
--				globals = { "vim" },
--			},
--			workspace = {
--				-- Make the server aware of Neovim runtime files
--				library = {
--					[vim.fn.expand("$VIMRUNTIME/lua")] = true,
--					[vim.fn.expand("$VIMRUNTIME/lua/vim/lsp")] = true,
--				},
--			},
--		},
--	},
--}))

local opts = {
	-- whether to highlight the currently hovered symbol
	-- disable if your cpu usage is higher than you want it
	-- or you just hate the highlight
	-- default: true
	highlight_hovered_item = true,

	-- whether to show outline guides
	-- default: true
	show_guides = true,
}

require("symbols-outline").setup(opts)

local snippets_paths = function()
	local plugins = { "friendly-snippets" }
	local paths = {}
	local path
	local root_path = vim.env.HOME .. "/.vim/plugged/"
	for _, plug in ipairs(plugins) do
		path = root_path .. plug
		if vim.fn.isdirectory(path) ~= 0 then
			table.insert(paths, path)
		end
	end
	return paths
end

require("luasnip.loaders.from_vscode").lazy_load({
	paths = snippets_paths(),
	include = nil, -- Load all languages
	exclude = {},
})