Dotfiles/site-modules/core/files/vim/plugin/lsp.lua

local lspconfig = require "lspconfig"

local servers = {
  -- Language servers for the day to day web development, could probably think
  -- about loosing the html and css one and living with typescript and emmet
  tsserver = {},
  html = {},
  cssls = {},
  emmet_ls = {
    filetypes = { "html", "typescriptreact", "javascriptreact", "css", "scss", "eruby" },
  },
  -- Ruby
  solargraph = {},
  -- Rust
  rust_analyzer = {},
  -- Lua for the vim config and plugin dev
  sumneko_lua = {
    settings = {
      Lua = {
        runtime = { version = "LuaJIT" },
        diagnostics = { globals = { "vim" } },
        workspace = { library = vim.api.nvim_get_runtime_file("", true) },
        telemetry = { enable = false },
      },
    },
  },
}

local on_attach = function(_, bufnr)
  vim.api.nvim_buf_set_option(bufnr, "omnifunc", "v:lua.vim.lsp.omnifunc")

  local opts = { noremap = true, silent = true }

  -- Mappings.
  -- See `:help vim.lsp.*` for documentation on any of the below functions
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "K", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)

  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
end

local capabilities = require("cmp_nvim_lsp").update_capabilities(vim.lsp.protocol.make_client_capabilities())
capabilities.textDocument.completion.completionItem.snippetSupport = true

for lsp, config in pairs(servers) do
  config["on_attach"] = on_attach
  config["capabilities"] = capabilities
  config["init_options"] = { usePlaceholders = true }

  lspconfig[lsp].setup(config)
end

-- Change the diagnostic signs
vim.fn.sign_define("DiagnosticSignHint", { text = "➤", texthl = "DiagnosticSignHint", numhl = "DiagnosticSignHint" })
vim.fn.sign_define("DiagnosticSignInfo", { text = "ℹ", texthl = "DiagnosticSignInfo", numhl = "DiagnosticSignInfo" })
vim.fn.sign_define("DiagnosticSignWarn", { text = "⚠", texthl = "DiagnosticSignWarn", numhl = "DiagnosticSignWarn" })
vim.fn.sign_define(
  "DiagnosticSignError",
  { text = "✖", texthl = "DiagnosticSignError", numhl = "DiagnosticSignError" }
)