dotfiles/.config/nixpkgs/neovim/init.lua

require('nvim-treesitter.configs').setup {
  highlight = {
    enable = true,
  },
}

local orig_util_open_floating_preview = vim.lsp.util.open_floating_preview
function vim.lsp.util.open_floating_preview(contents, syntax, opts, ...)
  opts = opts or {}
  opts.border = opts.border or 'single'
  return orig_util_open_floating_preview(contents, syntax, opts, ...)
end

vim.diagnostic.config({
  virtual_text = { severity = { min = vim.diagnostic.severity.WARN } }
})

local opts = { noremap=true, silent=true }
vim.api.nvim_set_keymap('n', '<space>e', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
vim.api.nvim_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<CR>', opts)
vim.api.nvim_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<CR>', opts)
vim.api.nvim_set_keymap('n', '<space>q', '<cmd>lua vim.diagnostic.setqflist({ severity = { min = vim.diagnostic.severity.WARN } })<CR>', opts)

function on_attach(client, bufnr)
  -- Enable completion triggered by <c-x><c-o>
  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- 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', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<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', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
end

require'nvim-treesitter.configs'.setup {
  highlight = {
    enable = true,
  },
}

local nvim_lsp = require('lspconfig')
local null_ls = require('null-ls')

local null_ls_sources = {}

if vim.fn.executable("node_modules/.bin/eslint") then
  table.insert(null_ls_sources, null_ls.builtins.formatting.eslint_d)
  table.insert(null_ls_sources, null_ls.builtins.diagnostics.eslint_d)
  table.insert(null_ls_sources, null_ls.builtins.code_actions.eslint_d)
end

if vim.fn.executable("gofmt") == 1 then
  table.insert(null_ls_sources, null_ls.builtins.formatting.gofmt)
end

if vim.fn.executable("shellcheck") == 1 then
  table.insert(null_ls_sources, null_ls.builtins.diagnostics.shellcheck)
  table.insert(null_ls_sources, null_ls.builtins.code_actions.shellcheck)
end

if vim.fn.executable("deno") == 1 then
  nvim_lsp.denols.setup({
    capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities()),
    on_attach = on_attach,
  });
  table.insert(null_ls_sources, null_ls.builtins.formatting.deno_fmt);
end

if vim.fn.executable("node_modules/.bin/tsc") == 1 then
  local ts_utils = require("nvim-lsp-ts-utils")
  ts_utils.setup({
    debug = false,
    disable_commands = false,
    enable_import_on_completion = true,

    -- import all
    import_all_timeout = 5000, -- ms
    -- lower numbers = higher priority
    import_all_priorities = {
        same_file = 1, -- add to existing import statement
        local_files = 2, -- git files or files with relative path markers
        buffer_content = 3, -- loaded buffer content
        buffers = 4, -- loaded buffer names
    },
    import_all_scan_buffers = 100,
    import_all_select_source = false,

    -- filter diagnostics
    filter_out_diagnostics_by_severity = {},
    filter_out_diagnostics_by_code = {},

    -- inlay hints
    auto_inlay_hints = true,
    inlay_hints_highlight = "Comment",

    -- update imports on file move
    update_imports_on_move = false,
    require_confirmation_on_move = false,
    watch_dir = nil,
  })

  nvim_lsp.tsserver.setup({
    init_options = ts_utils.init_options,
    capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities()),
    flags = {
      debounce_text_changes = 150,
    },
    on_attach = function(client, bufnr)
      client.resolved_capabilities.document_formatting = false
      client.resolved_capabilities.document_range_formatting = false

      on_attach(client, bufnr)

      -- required to fix code action ranges and filter diagnostics
      ts_utils.setup_client(client)
    end,
  })
end

null_ls.setup({
  sources = null_ls_sources,

  on_attach = function(client, bufnr)
    if client.resolved_capabilities.document_formatting then
      vim.cmd([[
      augroup LspFormatting
        autocmd! * <buffer>
        autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_sync()
      augroup END
      ]])
    end
    on_attach(client, bufnr)
  end,
});

-- Setup nvim-cmp.
local cmp = require'cmp'

cmp.setup({
  completion = {
    autocomplete = false,
  },
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.close(),
    ['<CR>'] = cmp.mapping.confirm({ select = true }),
  },
  sources = {
    { name = 'nvim_lsp' },
    { name = 'vsnip' },
    { name = 'buffer' },
  }
})