vim_config/conf/nvim/init.lua

--Plug init
--
local Plug = vim.fn['plug#']
vim.call('plug#begin', '~/.local/lib/nvim/plugged')

    -- vim airline and vim airline theme
    Plug 'vim-airline/vim-airline'
    -- vim airline and vim airline theme
    Plug 'vim-airline/vim-airline-themes'

    Plug 'w0rp/ale'

    -- Base16 theme
    Plug 'chriskempson/base16-vim'

    -- NERDTree file manager
    Plug 'scrooloose/nerdtree'

    -- Vim fugitive
    Plug 'tpope/vim-fugitive'
    Plug 'tpope/vim-surround'
    Plug 'sheerun/vim-polyglot'

    Plug('Shougo/deoplete.nvim', { ['do'] = ':UpdateRemotePlugins' })
    Plug 'zchee/deoplete-jedi'

    -- Grammalecte
    Plug('dpelle/vim-Grammalecte', { on = 'GrammalecteCheck' })

vim.call('plug#end')

-- General Option
vim.opt.autoindent = true
vim.opt.background = 'dark'
vim.opt.backupdir = '$HOME/.local/tmp/nvim'
vim.opt.clipboard = 'unnamedplus'      --Use system clipboard
vim.opt.colorcolumn = '80'
vim.opt.directory = '$HOME/.local/tmp/nvim'
vim.opt.expandtab = true
vim.opt.foldmethod = 'syntax'
vim.opt.gdefault = true 	            -- search: all occurrences by default
vim.opt.hlsearch = true 	            -- search: hightlight terms
vim.opt.ignorecase = true
vim.opt.incsearch = true
vim.opt.laststatus = 1
-- show special character
vim.opt.listchars = {tab = '→ ', trail = '␣', eol = '', extends = '…' }

vim.opt.number = true
vim.opt.shiftwidth = 4
vim.opt.showmatch = true
vim.opt.smartcase = true                -- search: try :to be smart about cases
vim.opt.smartindent = true
vim.opt.tabstop = 4
vim.opt.termguicolors = true            -- 24 bits color support
vim.opt.wildmenu = true                 -- activate enhanced user menu
vim.opt.wildmode = 'lastused:full,list'  -- enhance menu

-- Options than need vim.cmd
vim.cmd('syntax on')
vim.cmd('colorscheme base16-classic-dark')

-- Global variables
vim.g['base16colorspace'] =  256

-- Vim-airLine
vim.g['airline#extensions#tabline#enabled'] = 1
vim.g['airline#extensions#tabline#left_sep'] = ''
vim.g['airline#extensions#tabline#left_alt_sep'] = '|'
vim.g['g:airline_powerline_fonts'] = 1
vim.g['airline_skip_empty_sections'] = 1
vim.g['airline#extensions#tabline#show_splits'] = 0

-- ALE
vim.g['ale_sign_column_always'] = 1
vim.g['ale_sign_error'] = '⚠'
vim.g['ale_sign_warning'] = '⚠'
vim.g['ale_echo_msg_format'] = '[%linter%] %s [%severity%]'

-- -- Code Fold
-- "Load and save view atomatocally (save and restore fold)
vim.cmd('au BufWinLeave *.* mkview')
vim.cmd('au BufWinEnter *.* silent! loadview')

-- NerdTree
-- Close NERDTree if it is the last buffer open
vim.cmd('au bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif')

-- Grammalecte
vim.g['grammalecte_cli_py'] = '/usr/bin/grammalecte-cli'

-- Deoplete
vim.g['deoplete#enable_at_startup'] = 1
-- inoremap <silent><expr><tab> pumvisible()? "\<c-n>" : "\<tab>"
-- inoremap <silent><expr><s-tab> pumvisible()? "\<c-p>" : "\<s-tab>"


local map = function(key)
  -- get the extra options
  local opts = {noremap = true}
  for i, v in pairs(key) do
    if type(i) == 'string' then opts[i] = v end
  end

  -- basic support for buffer-scoped keybindings
  local buffer = opts.buffer
  opts.buffer = nil

  if buffer then
    vim.api.nvim_buf_set_keymap(0, key[1], key[2], key[3], opts)
  else
    vim.api.nvim_set_keymap(key[1], key[2], key[3], opts)
  end
end

-- " Key biding
-- " ----------
-- map {'', '[C-left]', ':tabprevious<CR>', noremap = false, silent = true}
-- map {'', '[C-right]', ':tabnext<CR>', noremap = false, silent = true}
map {'n', '<leader>/', ':nohlsearch<CR>', noremap =  false, silent = true}
map {'n', '<F2>', ':NERDTreeToggle<CR>', noremap = false, silent = true}

-- Move tabs with \[ and \]
map {'n', '<Leader>]', ':tabnext<CR>', noremap = false, silent = true}
map {'n', '<Leader>[', ':tabprev<CR>', noremap = false, silent = true}
map {'n', '<leader>l', ':set list!<CR>', silent = true}

-- Manage Tab
local t = function(str)
  return vim.api.nvim_replace_termcodes(str, true, true, true)
end

_G.smart_tab = function()
  if vim.fn.pumvisible() == 1 then
    return t'<C-n>'
  else
    return t'<Tab>'
  end
end

vim.api.nvim_set_keymap(
  'i',
  '<Tab>',
  'v:lua.smart_tab()',
  {noremap = true, expr = true}
)

-- Autotype
vim.cmd('au BufRead,BufNewFile *.md setlocal textwidth=80')
vim.cmd('au BufRead,BufNewFile *.tex setlocal textwidth=80')
vim.cmd('au BufNewFile,BufRead /tmp/neomutt* set tw=72 fo=awq comments+=nb:> noautoindent filetype=mail')

-- Ignore these filenames during enhanced command line completion.
vim.opt.wildignore = {
    '*.bak',
    '*.class',
    '*.aux',
    '*.out',
    '*.toc',
    '*.jpg',
    '*.bmp',
    '*.gif',
    '*.png',
    '*.luac',
    '*.o',
    '*.obj',
    '*.exe',
    '*.dll',
    '*.manifest',
    '*.pyc',
    '*.spl',
    '*.sw?'
}