Nvim Lua init script

init.lua

local Plug = vim.fn['plug#']

vim.call('plug#begin')

-- File explorer
Plug('nvim-tree/nvim-tree.lua')
-- Visualization
Plug('vim-airline/vim-airline')
Plug('vim-airline/vim-airline-themes')
-- Git
Plug('apzelos/blamer.nvim')
-- File/Buffer finder
Plug('nvim-lua/plenary.nvim')
Plug('nvim-telescope/telescope.nvim')
-- LSP
Plug('williamboman/mason.nvim')
Plug('williamboman/mason-lspconfig.nvim')
Plug('neovim/nvim-lspconfig')
-- Autocompletion
Plug('hrsh7th/cmp-nvim-lsp')
Plug('hrsh7th/cmp-buffer')
Plug('hrsh7th/nvim-cmp')
Plug('hrsh7th/cmp-vsnip')
Plug('hrsh7th/vim-vsnip')
-- Syntax
-- Requires tree-sitter cli
Plug('nvim-treesitter/nvim-treesitter')

vim.call('plug#end')

local opt = vim.opt

opt.tabstop = 2
opt.softtabstop = 2
opt.shiftwidth = 2
opt.expandtab = true
opt.smarttab = true
opt.incsearch = true
opt.ignorecase = true
opt.smartcase = true
opt.hlsearch = true
opt.wildmode = { 'longest', 'list', 'full' }
opt.list = true
opt.breakindent = true
opt.number = true
opt.title = true
opt.scrolloff = 5
opt.completeopt = { 'menu', 'menuone', 'noselect' }

vim.cmd('filetype plugin indent on')
vim.cmd('colorscheme retrobox')

-- Plugin Configurations
-- nvim-tree.lua
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

require("nvim-tree").setup {
  renderer = {
    add_trailing = true,
    icons = {
      -- Disable some icons for now
      show = {
        file = false,
        folder = false,
        folder_arrow = false,
      },
    },
  },
}

-- Blamer
vim.g.blamer_enabled = 0
vim.g.blamer_relative_time = 1
vim.g.blamer_show_in_visual_modes = 0
vim.g.blamer_delay = 200
-- highlight Blamer guifg=lightgray

-- Airline
-- Powerline fonts needs https://github.com/powerline/fonts
vim.g.airline_powerline_fonts = 0
vim.g.airline_theme = 'bubblegum'
vim.g['airline#extensions#tabline#enabled'] = 1
vim.g['airline#extensions#tabline#formatter'] = 'unique_tail'

-- Cmp
local cmp = require("cmp")

cmp.setup({
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = cmp.mapping.preset.insert({
    -- ['<C-e>'] = cmp.mapping.scroll_docs(-4),
    -- ['<C-y>'] = cmp.mapping.scroll_docs(4),
  }),
  sources = cmp.config.sources(
  {
    { name = 'nvim_lsp' },
    { name = 'vsnip' },
    {
      name = 'buffer',
      option = {
        get_bufnrs = function()
          return vim.api.nvim_list_bufs()
        end
      },
    },
  })
})

-- LSP
local language_servers = {
  'lexical',
  'pylsp',
  'solargraph',
}


require("mason").setup()
require("mason-lspconfig").setup {
  ensure_installed = language_servers,
}

local lspconfig = require("lspconfig")
local lsp_capabilities = require("cmp_nvim_lsp").default_capabilities()

for _, server_name in ipairs(language_servers) do
  lspconfig[server_name].setup {
    capabilities = lsp_capabilities
  }
end

-- Treesitter
require('nvim-treesitter.configs').setup {
  ensure_installed = { 'elixir', 'vimdoc' },
  sync_install = true,
  auto_install = false,
  highlight = { enable = true }
}
-- Telescope
require('telescope').setup {
  defaults = {
    path_display = { "filename_first" }
  },
  pickers = {
    find_files = {
      no_ignore = true,
      hidden = true
    }
  }
}

local telescope_builtin = require('telescope.builtin')

-- Mappings
local mappings = {
  {{'n', 'v'}, '<C-n>', ':NvimTreeToggle<cr>'},
  {{'n', 'v'}, '<C-b>', ':NvimTreeFindFile<cr>'},
  -- Override C-f that I never really use
  -- fd-find recommended
  {{'n', 'v'}, '<A-f>', telescope_builtin.find_files},
  {{'n', 'v'}, '<C-f>', telescope_builtin.git_files},
  -- requires ripgrep
  {{'n', 'v'}, '<C-s>', telescope_builtin.live_grep},
  {{'n', 'v'}, '<A-b>', telescope_builtin.buffers},
  {{'n', 'v'}, '<A-s>', telescope_builtin.grep_string},
  -- LSP
  {{'n', 'i'}, '<leader>s', vim.diagnostic.open_float},
  {{'n', 'v'}, '<leader>d', vim.lsp.buf.definition},
  -- git
  {{'n', 'v', 'i'}, '<leader>gb', ':BlamerToggle<cr>'},
  -- Other
  {{'n', 'v'}, '<esc>', ':nohl<cr>'},
}

for _, mapping_args in ipairs(mappings) do
  vim.keymap.set(unpack(mapping_args))
end