init.lua

function _G.dump(...)
    local objects = vim.tbl_map(vim.inspect, {...})
    print(unpack(objects))
end

vim.lsp.set_log_level("debug")

local cmd = vim.cmd
local fn = vim.fn
local g = vim.g

cmd 'packadd packer.nvim'

require('packer').startup(function()
  -- For developing lua plugins and debugging
  use {'bfredl/nvim-luadev'}
  -- Packer can manage itself as an optional plugin
  use {'wbthomason/packer.nvim', opt = true}
  use {'nvim-treesitter/nvim-treesitter', run = ':TSUpdate'}
  -- Install LSP config
  use {'neovim/nvim-lspconfig'}
  -- Add autocompletion framework
  use {'nvim-lua/completion-nvim'}
  -- Allows easily setup config in VimL like fashion
  use {'svermeulen/vimpeccable'}
  -- Use shiny status bar
  use {'itchyny/lightline.vim'}

  -- Some colorschemes to try
  use {'joshdick/onedark.vim'}
  use {'drewtempelmeyer/palenight.vim'}
  use {'ayu-theme/ayu-vim'}
  use {'morhetz/gruvbox'}
  use {'rakr/vim-one'}
  use {'mhartington/oceanic-next'}
end)

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

local nvim_lsp = require('lspconfig')
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

  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }
  buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', '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', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
  buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)

  -- Set some keybinds conditional on server capabilities
  if client.resolved_capabilities.document_formatting then
    buf_set_keymap("n", "<space>f", "<cmd>lua vim.lsp.buf.formatting()<CR>", opts)
  elseif client.resolved_capabilities.document_range_formatting then
    buf_set_keymap("n", "<space>f", "<cmd>lua vim.lsp.buf.range_formatting()<CR>", opts)
  end

  -- Set autocommands conditional on server_capabilities
  if client.resolved_capabilities.document_highlight then
    vim.api.nvim_exec([[
      hi LspReferenceRead cterm=bold ctermbg=red guibg=LightYellow
      hi LspReferenceText cterm=bold ctermbg=red guibg=LightYellow
      hi LspReferenceWrite cterm=bold ctermbg=red guibg=LightYellow
      augroup lsp_document_highlight
        autocmd!
        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
      augroup END
    ]], false)
  end
end

-- Use a loop to conveniently both setup defined servers 
-- and map buffer local keybindings when the language server attaches
local servers = { "tsserver" }
for _, lsp in ipairs(servers) do
  nvim_lsp[lsp].setup { 
    on_attach = on_attach,
    log_level = vim.lsp.protocol.MessageType.Log,
    message_level = vim.lsp.protocol.MessageType.Log 
  }
end

---- GLOBAL VARIABLES ----
g['lightline'] = {colorscheme = 'one'} 

---- OPTIONS ----

---- helper functions ----
local scopes = {o = vim.o, b = vim.bo, w = vim.wo}
local function opt(scope, key, value)
  scopes[scope][key] = value
  if scope ~= 'o' then scopes['o'][key] = value end
end

local indent = 2;

-- set colorscheme
-- colorscheme onedark
cmd 'colorscheme onedark'

---- local to buffer options ----
opt('b', 'tabstop', indent)
opt('b', 'softtabstop', indent)
opt('b', 'shiftwidth', indent)
opt('b', 'expandtab', true)
opt('b', 'smartindent', true)
opt('b', 'swapfile', false)

---- local to window options ----
opt('w', 'signcolumn', 'yes')
opt('w', 'number', true)
opt('w', 'relativenumber', true)
opt('w', 'list', true)
opt('w', 'wrap', false)

---- global options ----
opt('o', 'hlsearch', false)
opt('o', 'incsearch', true)
opt('o', 'hidden', true)
opt('o', 'errorbells', false)
opt('o', 'completeopt', 'menuone,noinsert,noselect')
opt('o', 'ignorecase', true)
opt('o', 'smartcase', true)
opt('o', 'splitbelow', true)
opt('o', 'splitright', true)
opt('o', 'termguicolors', true)
opt('o', 'wildmode', 'list:longest')
opt('o', 'backup', false)
opt('o', 'undodir', '~/.local/share/nvim/undodir')
opt('o', 'undofile', true)
opt('o', 'scrolloff', 8)
opt('o', 'sidescrolloff', 8 )
opt('o', 'joinspaces', false)
opt('o', 'showmode', false)
opt('o', 'background', 'dark')

---- MAPPINGS ----
local vimp = require('vimp')
vimp.bind('nvo', 'Y', 'y$')

---- COMMANDS ----
cmd 'autocmd CmdlineEnter /,? :set hlsearch'
cmd 'autocmd CmdlineLeave /,? :set nohlsearch'