nvim-config-kickstart/lua/lsp.lua

local lspattach = vim.api.nvim_create_augroup("LspMapping", { clear = true })

--  This function gets run when an LSP connects to a particular buffer.
vim.api.nvim_create_autocmd("LspAttach", {
  group = lspattach,
  callback = function(args)
    -- NOTE: Remember that lua is a real programming language, and as such it is possible
    -- to define small helper and utility functions so you don't have to repeat yourself
    -- many times.
    --
    -- In this case, we create a function that lets us more easily define mappings specific
    -- for LSP related items. It sets the mode, buffer and description for us each time.
    local nmap = function(keys, func, desc)
      if desc then
        desc = 'LSP: ' .. desc
      end

      vim.keymap.set('n', keys, func, { buffer = args.buf, silent = true, desc = desc })
    end

    nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
    nmap('<leader>c', vim.lsp.buf.code_action, '[C]ode action') -- NOTE: to see if ca is needed
    nmap('<leader>f', function()                                -- https://stackoverflow.com/a/74303272
      vim.lsp.buf.code_action({
        filter = function(a)
          return a.isPreferred
        end,
        apply = true
      })
    end, 'code action: [F]ix'
    )

    nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
    nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
    nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
    nmap('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
    nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
    nmap('<leader>dd', function()
      local new_config = not vim.diagnostic.config().virtual_lines
      vim.diagnostic.config({ virtual_lines = new_config })
    end, '[D]iagnostic toggle virtual lines')
    nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

    -- See `:help K` for why this keymap
    nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
    nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

    -- Lesser used LSP functionality
    nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
    nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
    nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
    nmap('<leader>wl', function()
      print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, '[W]orkspace [L]ist Folders')

    -- Create a command `:Format` local to the LSP buffer
    vim.api.nvim_buf_create_user_command(args.buf, 'Format', function(_)
      vim.lsp.buf.format()
    end, { desc = 'Format current buffer with LSP' })
  end,
})

-- document existing key chains
require('which-key').add {
  -- { "<leader>c",  group = "[C]ode" },
  -- { "<leader>c_", hidden = true },
  { "<leader>d",   group = "[D]ocument / [D]iagnostic/ [D]ebug" },
  { "<leader>d_",  hidden = true },
  { "<leader>ds",  group = "[D]ebug [S]tep" },
  { "<leader>ds_", hidden = true },
  { "<leader>g",   group = "[G]it" },
  { "<leader>g_",  hidden = true },
  { "<leader>h",   group = "Git [H]unk" },
  { "<leader>h_",  hidden = true },
  { "<leader>r",   group = "[R]ename" },
  { "<leader>r_",  hidden = true },
  { "<leader>s",   group = "[S]earch" },
  { "<leader>s_",  hidden = true },
  { "<leader>t",   group = "[T]oggle" },
  { "<leader>t_",  hidden = true },
  { "<leader>w",   group = "[W]orkspace" },
  { "<leader>w_",  hidden = true },
}
-- register which-key VISUAL mode
-- required for visual <leader>hs (hunk stage) to work
require('which-key').add {
  { "<leader>",  group = "VISUAL <leader>", mode = "v" },
  { "<leader>h", desc = "Git [H]unk",       mode = "v" },
}

-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
-- local capabilities = vim.lsp.protocol.make_client_capabilities()
-- capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

-- [[ DAP ]]

local setup_dap = function()
  local dap = require('dap');
  local ui = require('dapui');
  ui.setup();
  require("nvim-dap-virtual-text").setup();

  vim.keymap.set("n", "<Leader>b", dap.toggle_breakpoint, { desc = "Debug [B]reakpoint", silent = true });
  vim.keymap.set("n", "<Leader>dr", dap.run_to_cursor, { desc = "[D]ebug [R]un to cursor" });
  vim.keymap.set("n", "<Leader>de", function()
    ui.eval(nil, { enter = true })
  end, { desc = "[D]ebug [E]val under cursor", silent = true });

  -- TODO: add some DAP configs to test

  vim.keymap.set("n", "<Leader>dc", dap.continue, { desc = "[D]ebug [C]ontinue", silent = true })
  vim.keymap.set("n", "<Leader>dsi", dap.step_into, { desc = "[D]ebug [S]tep [I]nto", silent = true })
  vim.keymap.set("n", "<Leader>dso", dap.step_over, { desc = "[D]ebug [S]tep [O]ver", silent = true })
  vim.keymap.set("n", "<Leader>dsu", dap.step_out, { desc = "[D]ebug [S]tep o[U]t", silent = true })
  vim.keymap.set("n", "<Leader>dsb", dap.step_back, { desc = "[D]ebug [S]tep [B]ack", silent = true })
  vim.keymap.set("n", "<Leader>dr", dap.restart, { desc = "[D]ebug [R]estart", silent = true })

  dap.listeners.before.attach.dapui_config = function()
    ui.open()
  end
  dap.listeners.before.launch.dapui_config = function()
    ui.open()
  end
  dap.listeners.before.event_terminated.dapui_config = function()
    ui.close()
  end
  dap.listeners.before.event_exited.dapui_config = function()
    ui.close()
  end
end

setup_dap()

local setup_godot_dap = function()
  local dap = require("dap")

  dap.adapters.godot = {
    type = "server",
    host = "127.0.0.1",
    port = 6006,
  }

  dap.configurations.gdscript = {
    {
      launch_game_instance = false,
      launch_scene = false,
      name = "Launch scene",
      project = "${workspaceFolder}",
      request = "launch",
      type = "godot",
    },
  }
end

setup_godot_dap()

-- [[ lsp configurations ]]
vim.lsp.config("lua_ls", {
  settings = {
    Lua = {
      workspace = { checkThirdParty = false },
      telemetry = { enable = false },
      -- NOTE: toggle below to ignore Lua_LS's noisy `missing-fields` warnings
      -- diagnostics = { disable = { 'missing-fields' } },
    },
  }
})


vim.diagnostic.config({ virtual_lines = true })
vim.lsp.enable({
  -- managed in lsp directory
  "ltex_ls_plus", "rust-analyzer", "gdscript",
  -- managed by lsp-config
  "tinymist", "texlab", "clangd", "pyright", "ts_ls", "eslint", "lua_ls", "bashls", "jsonls"
})