nvim lsp setup

-- LSP stuff
local nvim_lsp = require('lspconfig')
local lsp_util = require('lspconfig.util')
local langs = {
  hls = {},
  rust_analyzer = {
    settings = {
      ["rust-analyzer"] = {
        procMacro = { enable = false }
      }
    }
  },
  clangd = {},
  texlab = {
    settings = {
      args = {"-pdf", "--shell-escape"}
    }
  },
  erlangls = {},
  eslint = {},
  pylsp = {},
  solargraph = { root_dir = lsp_util.root_pattern("Gemfile", ".git", ".svn", ".solargraph.yml") },
  -- ruby_ls = { root_dir = lsp_util.root_pattern("Gemfile", ".git", ".svn") },
  cmake = {},
}

local custom_attach = function(client, bufnr_)
  bufnr = 0
  local function map(mode, key, value)
    vim.keymap.set(mode,key,value,{noremap = true, silent = true, buffer = bufnr})
  end
  local function nmap(key, value) map('n', key, value) end
  local function set_option(opt, val)
    vim.api.nvim_buf_set_option(bufnr_, opt, val)
  end
  set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
  nmap('gd', vim.lsp.buf.definition)
  nmap('gd', vim.lsp.buf.definition)
  nmap('gd', vim.lsp.buf.definition)
  nmap('gd', vim.lsp.buf.definition)
  nmap('gd', vim.lsp.buf.definition)
  nmap('gd', vim.lsp.buf.definition)
  nmap('gD', vim.lsp.buf.type_definition)
  nmap('gr', vim.lsp.buf.references)
  nmap('gR', vim.lsp.buf.rename)
  map('v', 'K', vim.lsp.buf.hover)
  nmap('K',  vim.lsp.buf.hover)
  nmap('ga', vim.lsp.buf.code_action)
  nmap('=f', vim.lsp.buf.format)
  nmap('].', vim.diagnostic.goto_next)
  nmap('[.', vim.diagnostic.goto_prev)
  nmap('<leader>i', function () vim.diagnostic.open_float(0, { scope = "line", padding="single" }) end)
  nmap('<leader>d', vim.lsp.buf.code_action)
  nmap('<leader>q', vim.diagnostic.setqflist)
end

for lang,opts in pairs(langs) do
  nvim_lsp[lang].setup(opts)
  nvim_lsp[lang].setup { on_attach = custom_attach }
end