My ~/.vimrc config file

vimrc

set nocompatible
filetype off
filetype indent plugin on

" Buffers
nnoremap gp :bp<CR>
nnoremap gn :bn<CR>
nnoremap gl :ls<CR>
nnoremap gb :ls<CR>:b

" Splits
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>
imap <C-H> <Esc><C-W>h
imap <C-J> <Esc><C-W>j
imap <C-K> <Esc><C-W>k
imap <C-L> <Esc><C-W>l
set splitbelow
set splitright

" Folding
set foldmethod=indent
set foldlevel=99
nnoremap <space> za

" General
syntax on
set autoindent
set autoread
set backspace=indent,eol,start
set expandtab
set linebreak
set number
set shiftwidth=4
set softtabstop=4
set tabstop=4

" Internal
set nobackup
set noswapfile
set nowritebackup

" Shortcuts
autocmd BufWritePre * %s/\s\+$//e
nmap <CR> o<Esc>
nmap <F5> :%!python -m json.tool<CR>
nmap <S-Enter> O<Esc>
nnoremap <C-F> :FZF<CR>
set pastetoggle=<F3>

" Spell-check
" nmap <F11> :setlocal spell spelllang=en_us<CR> --- Not working properly

" Errors.
command! W w
command! Wq wq
command! WQ wq
command! Q q

" Plug
call plug#begin('~/.vim/plugged')
" Plug 'SirVer/ultisnips' --- Not interested just yet
" Plug 'davidhalter/jedi-vim' --- Not working properly with virtualenv
" Plug 'honza/vim-snippets' -- Not interested just yet
" Plug 'ludovicchabant/vim-gutentags' --- Not sure what this plugin does
" Plug 'python-rope/ropevim' --- Needs further investigation on how it works.
" Plug 'rhysd/vim-grammarous' --- Not happy with this plugin
" Plug 'sheerun/vim-polyglot' --- Needs further investigation.
" Plug 'yuttie/comfortable-motion.vim' --- Not happy with this plugin
Plug 'airblade/vim-gitgutter'
Plug 'chrisbra/csv.vim'
Plug 'flazz/vim-colorschemes'
Plug 'jmcantrell/vim-virtualenv'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'
Plug 'junegunn/goyo.vim'
Plug 'junegunn/limelight.vim'
Plug 'luochen1990/rainbow'
Plug 'majutsushi/tagbar'
Plug 'mhinz/vim-startify'
Plug 'python-mode/python-mode', { 'for': 'python', 'branch': 'develop' }
Plug 'scrooloose/nerdtree'
Plug 'tmhedberg/SimpylFold'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-fugitive'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'w0rp/ale'
Plug 'python-rope/ropevim'
Plug 'davidhalter/jedi-vim'
Plug 'SirVer/ultisnips'
Plug 'honza/vim-snippets'
Plug 'tpope/vim-fugitive'
Plug 'sheerun/vim-polyglot'
Plug 'ludovicchabant/vim-gutentags'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'scrooloose/nerdtree'
Plug 'flazz/vim-colorschemes'
Plug 'majutsushi/tagbar'
call plug#end()

" vim-gitgutter
set updatetime=100

" csv.vim
" ------ No configuration needed.

" vim-colorschemes
colo dracula

" vim-virtualenv
let g:virtualenv_directory = '/Users/jorgearevalo/.venv'
let g:virtualenv_auto_activate = 1

" fzf
" ------ No configuration needed.

" goyo.vim
nmap <F9> :Goyo<CR>

" limelight.vim
autocmd! User GoyoEnter Limelight
autocmd! User GoyoLeave Limelight!
let g:limelight_conceal_ctermfg = 'gray'

" rainbow
let g:rainbow_active = 1
let g:rainbow_conf = {
\   'ctermfgs': ['darkblue', 'yellow', 'green', 'darkmagenta'],
\	'parentheses': ['start=/(/ end=/)/ fold', 'start=/\[/ end=/\]/ fold', 'start=/{/ end=/}/ fold', 'start=/{%/ end=/%}/ fold'],
\}

" tagbar
" ------ Exuberant CTAGS have to be installed
nmap <F12> :TagbarToggle<CR>

" vim-startify
" ------ No configuration needed.

" python-mode
let g:pymode = 1
let g:pymode_trim_whitespaces = 1
let g:pymode_indent = 1
let g:pymode_doc = 1
" let g:pymode_doc_bind = '<C-K>'
let g:pymode_virtualenv = 1
let g:pymode_lint = 1
let g:pymode_lint_on_write = 1
let g:pymode_rope_goto_definition_bind = '<C-K>'
let g:pymode_rope_goto_definition_cmd = 'new'
let g:virtualenv_directory = "~/.venv/"

" vim-grammarous
" nmap <F10> :GrammarousCheck<CR>

" nerdtree
map <F2> :NERDTreeToggle<CR>
let NERDTreeIgnore=['__pycache__$[[dir]]', '\~$']
let g:NERDTreeNodeDelimiter = "\u00a0"

" SimpylFold
let g:SimpylFold_docstring_preview=1

" vim-commentary
" ------ No configuration needed.

" vim-fugitive
" ------ No configuration needed.

" vim-airline
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#ale#enabled = 1

" vim-airline-themes
let g:airline_theme='dracula'

" ale
" for python - python -m pip install flake8
let g:ale_set_highlights = 0

" comfortable-motion.vim
" let g:comfortable_motion_scroll_down_key = "j"
" let g:comfortable_motion_scroll_up_key = "k"

" Backspace over anything in insert mode
set backspace=indent,eol,start

" Press F4 to toggle highlighting on/off, and show current value.
:noremap <F4> :set hlsearch! hlsearch?<CR>

" Airline configuration
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#formatter = 'default'

" Nerdtree configuration
map <C-n> :NERDTreeToggle<CR>
let NERDTreeIgnore=['\.pyc$', '\~$']
autocmd VimEnter * NERDTree
autocmd VimEnter * wincmd p
let g:NERDTreeDirArrowExpandable = '▸'
let g:NERDTreeDirArrowCollapsible = '▾'

" Switching between buffers
" Set commands to switching between buffers
:nnoremap <Tab> :bnext!<CR>
:nnoremap <S-Tab> :bprevious!<CR>
:nnoremap <C-X> :bp<bar>sp<bar>bn<bar>bd<CR>

" File searchs
map <C-p> :Files<CR>

" Ale Configuration
"""" Better formatting fo worp/ale
let g:ale_echo_msg_error_str = 'E'
let g:ale_echo_msg_warning_str = 'W'
let g:ale_echo_msg_format = '[%linter%] %s [%severity%] [%...code...%]'
"""" Enable completion where available.
let g:ale_completion_enabled = 1
""" Customize linters that are turned on
let g:ale_linters = {
	\   'python': ['flake8'],
	\}
let g:ale_set_highlights = 0

" Fix keys
set backspace=2

let g:UltiSnipsExpandTrigger='<tab>'
let g:UltiSnipsListSnippets='<c-tab>'
let g:UltiSnipsJumpForwardTrigger='<c-j>'
let g:UltiSnipsJumpBackwardTrigger='<c-k>'

nmap <F8> :TagbarToggle<CR>