init.vim

set nocompatible
set backspace=indent,eol,start
set hidden
set noswapfile
let g:mapleader = " "

call plug#begin('~/.vim/nvim-plugged')
    Plug 'tpope/vim-sensible'
    Plug 'vim-airline/vim-airline'
    Plug 'ryanoasis/vim-devicons'
    Plug 'scrooloose/nerdtree'
    Plug 'sainnhe/gruvbox-material'
    Plug 'cespare/vim-toml'
    Plug 'rust-lang/rust.vim'
    
    Plug 'neovim/nvim-lspconfig'
    Plug 'williamboman/nvim-lsp-installer'
    Plug 'hrsh7th/nvim-cmp'
    Plug 'hrsh7th/cmp-nvim-lsp'
    Plug 'L3MON4D3/LuaSnip'
    
    Plug 'bling/vim-bufferline'
    Plug 'ctrlpvim/ctrlp.vim'
    Plug 'greymd/oscyank.vim'
    Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
    Plug 'junegunn/fzf.vim'
call plug#end()

lua << EOF
local nvim_lsp = require('lspconfig')

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
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

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  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', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<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>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)

end

local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)

local lsp_installer = require("nvim-lsp-installer")

lsp_installer.on_server_ready(function(server)
    local opts = {on_attach=on_attach, capabilities=capabilities}
    -- This setup() function is exactly the same as lspconfig's setup function.
    -- Refer to https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
    server:setup(opts)
end)

local cmp = require 'cmp'
cmp.setup {
  snippet = {
    expand = function(args)
      require('luasnip').lsp_expand(args.body)
    end,
  },
  mapping = {
    ['<C-p>'] = cmp.mapping.select_prev_item(),
    ['<C-n>'] = cmp.mapping.select_next_item(),
    ['<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 {
      behavior = cmp.ConfirmBehavior.Replace,
      select = true,
    },
  },
  sources = {
    { name = 'nvim_lsp' },
    { name = 'luasnip' },
  },
}

EOF


syntax enable
set bg=dark
let g:gruvbox_material_background = 'soft'
colorscheme gruvbox-material

filetype plugin indent on

set mouse=a
set number
set relativenumber
set autoindent
set tabstop=4
set shiftwidth=4
set expandtab
set textwidth=100
set cc=+1
set updatetime=1000
set signcolumn=yes

let g:rustfmt_autosave = 1
let g:airline#extensions#tabline#enabled = 1

nnoremap <leader>nt :NERDTreeToggle<CR>
nnoremap <leader>fd :CtrlP<CR>
nnoremap <leader>fb :Buffers<CR>