.vimrc

" Use the Solarized Dark theme
set background=dark
colorscheme desert
" let g:solarized_termtrans=1

" https://github.com/tpope/vim-pathogen
execute pathogen#infect()

" Make Vim more useful
set nocompatible
" Use the OS clipboard by default (on versions compiled with `+clipboard`)
set clipboard=unnamed
" Enhance command-line completion
set wildmenu
" Allow cursor keys in insert mode
set esckeys
" Allow backspace in insert mode
set backspace=indent,eol,start
" Optimize for fast terminal connections
set ttyfast
" Add the g flag to search/replace by default
set gdefault
" Use UTF-8 without BOM
set encoding=utf-8 nobomb
" Change mapleader
let mapleader=","
" Don’t add empty newlines at the end of files
set binary
set noeol
" Centralize backups, swapfiles and undo history
set backupdir=~/.vim/backups
set directory=~/.vim/swaps
if exists("&undodir")
	set undodir=~/.vim/undo
endif

" Don’t create backups when editing files in certain directories
set backupskip=/tmp/*,/private/tmp/*

" Respect modeline in files
set modeline
set modelines=4
" Enable per-directory .vimrc files and disable unsafe commands in them
set exrc
set secure
" Enable line numbers
set number
" Enable syntax highlighting
syntax on
" Highlight current line
set cursorline
highlight CursorLine cterm=NONE ctermbg=NONE ctermfg=NONE guibg=NONE guifg=NONE

" Make tabs as wide as two spaces
set tabstop=2
" Indents will have a width of 2
set shiftwidth=2
" Sets the number of columns for a TAB
set softtabstop=2
" Expand TABs to spaces
set expandtab
set autoindent
set smartindent

" Show “invisible” characters
set lcs=tab:▸\ ,trail:·,nbsp:_
set list
" Highlight searches
set hlsearch
" Ignore case of searches
set ignorecase
" Highlight dynamically as pattern is typed
set incsearch
" Always show status line
set laststatus=2
" Enable mouse in all modes
set mouse=a
" Disable error bells
set noerrorbells
" Don’t reset cursor to start of line when moving around.
set nostartofline
" Show the cursor position
set ruler
" Don’t show the intro message when starting Vim
set shortmess=atI
" Show the current mode
set showmode
" Show the filename in the window titlebar
set title
" Show the (partial) command as it’s being typed
set showcmd
" Use relative line numbers
" if exists("&relativenumber")
" 	set relativenumber
" 	au BufReadPost * set relativenumber
" endif
" Start scrolling three lines before the horizontal window border
set scrolloff=3

" Strip trailing whitespace (,ss)
function! StripWhitespace()
	let save_cursor = getpos(".")
	let old_query = getreg('/')
	:%s/\s\+$//e
	call setpos('.', save_cursor)
	call setreg('/', old_query)
endfunction
noremap <leader>ss :call StripWhitespace()<CR>
" Save a file as root (,W)
noremap <leader>W :w !sudo tee % > /dev/null<CR>

filetype plugin indent on
" Automatic commands
if has("autocmd")
	" Enable file type detection
	filetype on
	" Treat .json files as .js
	autocmd BufNewFile,BufRead *.json setfiletype json syntax=javascript
	" Treat .md files as Markdown
	autocmd BufNewFile,BufRead *.md setlocal filetype=markdown
endif

" https://flow.org/en/docs/editors/vim/
" Asynchronous Lint Engine (ALE)
" Limit linters used for JavaScript.
let g:ale_linters = {
\  'javascript': ['prettier', 'flow'],
\  'typescript': ['tslint', 'prettier'],
\  'css': [],
\  'html': [],
\}
" \  'haskell': []

highlight clear ALEErrorSign " otherwise uses error bg color (typically red)
highlight clear ALEWarningSign " otherwise uses error bg color (typically red)
let g:ale_sign_error = 'X' " could use emoji
let g:ale_sign_warning = '?' " could use emoji
let g:ale_statusline_format = ['X %d', '? %d', '']
" %linter% is the name of the linter that provided the message
" %s is the error or warning message
let g:ale_echo_msg_format = '%linter% says %s'
" Map keys to navigate between lines with errors and warnings.
nnoremap <leader>an :ALENextWrap<cr>
nnoremap <leader>ap :ALEPreviousWrap<cr>

" NERDTree mapping https://github.com/scrooloose/nerdtree
map <C-n> :NERDTreeToggle<CR>