lsp.lua

local nvim_lsp = require("lspconfig")

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
  local function buf_set_keymap(...)
    vim.api.nvim_buf_set_keymap(bufnr, ...)
  end
  local function buf_set_option(...)
    vim.api.nvim_buf_set_option(bufnr, ...)
  end

  -- Mappings.
  local opts = {noremap = true}

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  buf_set_keymap("n", "<leader>gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
  buf_set_keymap("n", "<leader>gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
  buf_set_keymap("n", "K", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
  buf_set_keymap("n", "<leader>gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
  buf_set_keymap("i", "<C-k>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
  buf_set_keymap("n", "<leader>W", "<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>", opts)
  buf_set_keymap("n", "<leader>Wr", "<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>", opts)
  buf_set_keymap("n", "<leader>Wl", "<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>", opts)
  buf_set_keymap("n", "<leader>D", "<cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
  buf_set_keymap("n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
  buf_set_keymap("n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
  buf_set_keymap("n", "<leader>gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
  buf_set_keymap("n", "<leader>e", "<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>", opts)
  buf_set_keymap("n", "<C-[>", "<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>", opts)
  buf_set_keymap("n", "<C-]>", "<cmd>lua vim.lsp.diagnostic.goto_next()<CR>", opts)
  buf_set_keymap("n", "<leader>L", "<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>", opts)
end

nvim_lsp.ccls.setup {
  on_attach = on_attach,
  init_options = {
    cache = {
      directory = "/var/cache/ccls"
    }
  }
}

nvim_lsp.tsserver.setup {
  on_attach = on_attach
}

nvim_lsp.gopls.setup {
  on_attach = on_attach,
  cmd = {"gopls"},
  settings = {
    gopls = {
      experimentalPostfixCompletions = true,
      analyses = {
        unusedparams = true
      },
      staticcheck = true
    }
  }
}

nvim_lsp.pyright.setup {
  on_attach = on_attach,
  flags = {
    debounce_text_changes = 150
  }
}

require("cmpl")