dotvim/lua/lsp.lua

-- neodev.nvim
local neodev_nvim = require('neodev')
if neodev_nvim then
    neodev_nvim.setup({})
end

-- cmp-nvim-lsp, nvim-lspconfig
local nvim_lspconfig = require('lspconfig')
if nvim_lspconfig then
    local capabilities = vim.lsp.protocol.make_client_capabilities()

    local cmp_nvim_lsp = require('cmp_nvim_lsp')
    if cmp_nvim_lsp then
        capabilities = cmp_nvim_lsp.update_capabilities(capabilities, {snippetSupport = false})
    end

    nvim_lspconfig.clangd.setup({capabilities = capabilities})
    nvim_lspconfig.gopls.setup({capabilities = capabilities})
    nvim_lspconfig.jedi_language_server.setup({capabilities = capabilities})
    nvim_lspconfig.rust_analyzer.setup({capabilities = capabilities})
    nvim_lspconfig.tsserver.setup({capabilities = capabilities})
    nvim_lspconfig.sumneko_lua.setup({
        settings = {
            Lua = {
                diagnostics = {globals = {'vim'}},
                runtime = {version = 'LuaJIT'},
                telemetry = {enable = false},
                workspace = {library = vim.api.nvim_get_runtime_file('', true)},
            },
        },
    })

    vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help)
    vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition)
    vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action)
    vim.keymap.set('n', '<space>e', vim.diagnostic.open_float)
    vim.keymap.set('n', '<space>f', function() vim.lsp.buf.format({async = true}) end)
    vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist)
    vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename)
    vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder)
    vim.keymap.set('n', '<space>wl', function() print(vim.inspect(vim.lsp.buf.list_workspace_folders())) end)
    vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder)
    vim.keymap.set('n', 'K', vim.lsp.buf.hover)
    vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
    vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
    vim.keymap.set('n', 'gD', vim.lsp.buf.declaration)
    vim.keymap.set('n', 'gd', vim.lsp.buf.definition)
    vim.keymap.set('n', 'gi', vim.lsp.buf.implementation)
    vim.keymap.set('n', 'gr', vim.lsp.buf.references)

    vim.opt.omnifunc = 'v:lua.vim.lsp.omnifunc'
end

-- nvim-cmp
local nvim_cmp = require('cmp')
if nvim_cmp then
    nvim_cmp.setup({
        mapping = {
            ['<c-d>'] = nvim_cmp.mapping.scroll_docs(-4),
            ['<c-f>'] = nvim_cmp.mapping.scroll_docs(4),
            ['<c-n>'] = nvim_cmp.mapping.select_next_item(),
            ['<c-p>'] = nvim_cmp.mapping.select_prev_item(),
            ['<tab>'] = nvim_cmp.mapping.confirm({ select = true }),
        },
        sources = {
            {name = 'nvim_lsp'},
            {name = 'vsnip'},
        },
        snippet = {
            expand = function(args) vim.fn['vsnip#anonymous'](args.body) end,
        },
    })
end