My .vimrc (as of March 2019)

.vimrc

" .vimrc
" Maintained by: Anand Sharma
" anand.sharma@gmail.com
" Heavily borrowed from https://github.com/zanshin/dotfiles
" Need more studying: https://bitbucket.org/sjl/dotfiles/src/4e6f3d36c2417fd778f30192b90c51795bdcd368/vim/vimrc?at=default
"
" -------------------------------------------------------------------
" Forget compatibility with vi
" -------------------------------------------------------------------
set nocompatible

" -------------------------------------------------------------------
" setup Vundle to manage plugins
" -------------------------------------------------------------------
" turn filetype on so that we can turn if off without generating an exit code
" of 1 when quiting vim.
filetype on                     " best to have it on before turning it off
filetype off                    " needs to be off to setup Vundle
set rtp+=~/.vim/bundle/Vundle.vim   " add vundle to run time path
call vundle#rc()

" let Vundle manage Vundle
Plugin 'VundleVim/Vundle.vim'


" Tim Pope's Plugin for surrounding text
Plugin 'tpope/vim-surround'
Plugin 'tpope/vim-commentary'

" Git related Bundles
Plugin 'tpope/vim-fugitive'
Plugin 'airblade/vim-gitgutter'

" Bundles for Text Search
Plugin 'mileszs/ack.vim'

" Bundles related to Themes
Plugin 'sjl/badwolf.git'

" Bundles related to saving sessions
Plugin 'tpope/vim-obsession'

" Bundle for Fuzzy Search across files
Plugin 'kien/ctrlp.vim'

" Vim airline (as a replacement for vim-powerline)
Plugin 'vim-airline/vim-airline'
Plugin 'vim-airline/vim-airline-themes'

" Emoji in Vim :-)
Plugin 'junegunn/vim-emoji'

" Vim Go
Plugin 'fatih/vim-go'
Plugin 'AndrewRadev/splitjoin.vim'

" Visual Code Dark Scheme
" Plugin 'tomasiser/vim-code-dark'

if has('autocmd')
  filetype plugin indent on    " enable plugins, detection and indenting
endif

if has('syntax') && !exists('g:syntax_on')
  syntax on
endif

" -------------------------------------------------------------------
"  change map <leader> from \ to ,
"  ------------------------------------------------------------------
:let mapleader = ","

" -------------------------------------------------------------------
" Allow saving of files as sudo when I forgot to start vim using sudo.
" -------------------------------------------------------------------
cmap w!! w !sudo tee > /dev/null %

" -------------------------------------------------------------------
" time out mappings after 1 second (1000) 
" and key codes after 1/2 a second (500)
" -------------------------------------------------------------------
set timeout timeoutlen=1000 ttimeoutlen=500

" -------------------------------------------------------------------
" Trying to break a very old habit...
" ex mode commands made easy
" -------------------------------------------------------------------
nnoremap ; :
nnoremap Q <nop>

" -------------------------------------------------------------------
" basic options
" -------------------------------------------------------------------
set laststatus=2                  " always show the status line
set cmdheight=2                   " and use a two-line tall status line
set showcmd                       " show the command
set noshowmode                    " don't show the mode, vim-airline will do that for us
set autoindent                    " turns it on
set smartindent                   " does the right thing (mostly) in programs
set linespace=3                   " prefer a slight higher line height
set linebreak                     " wrap intelligently, won't insert hard line breaks
set wrap                          " use line wrapping
set textwidth=79                  " at column 79
set ruler                         " display current cursor position
set list                          " show invisible characters
set listchars=tab:▸\ ,eol:¬,trail:⋅,nbsp:␣,extends:❯,precedes:❮
set showmatch                     " show matching brackets
set relativenumber                " use relative line numbers
set number                        " all lines show their relative numbers, except the line you're currently on
set backspace=indent,eol,start    " make backspace behave in a sane manner
set mousehide                     " hide mouse when typing
set foldenable                    " enable code folding
set history=1000
set ffs=unix,mac,dos              " default file types
set autoread                      " automatically update file when edited outside of vim

" Setup automatic text formatting/wrapping (previously: grn1 )
set formatoptions=
set formatoptions-=t              " don't autowrap text
set formatoptions+=c              " do autowrap comments
set formatoptions+=r              " automatically continue comments
set formatoptions+=o              " automatically continue comments when hitting 'o' or 'O'
set formatoptions+=q              " allow formating of comments with 'gq'
set formatoptions+=n              " recognize numbered lists
set formatoptions+=l              " don't break long lines that were already there

" -------------------------------------------------------------------
" Navigation and movement
" -------------------------------------------------------------------
" disable arrow keys
map <up> <nop>
map <down> <nop>
map <left> <nop>
map <right> <nop>
imap <up> <nop>
imap <down> <nop>
imap <left> <nop>
imap <right> <nop>

" use <C>hjkl to switch between splits
nnoremap <C-h> <C-w>h
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-l> <C-w>l

" -------------------------------------------------------------------
" Encoding
" -------------------------------------------------------------------
set termencoding=utf-8  " we like utf-8
set encoding=utf-8

" -------------------------------------------------------------------
" What to do with files and focus
" -------------------------------------------------------------------
set autowrite           " write out old file when switching between files
set autoread            " reload files changed on disk, i.e. via `git checkout`
au FocusLost * :wa      " save file when Vim loses focus
set hidden              " switch beteen buffers without saving

" -------------------------------------------------------------------
" With Git who needs backup files?
" -------------------------------------------------------------------
set nobackup
set noswapfile

" -------------------------------------------------------------------
" Set tab stuff
" -------------------------------------------------------------------
set tabstop=2           " 2 spaces for a tab
set shiftwidth=2        " 2 spaces for autoindenting
set softtabstop=2       " when <BS>, pretend a tab is removed even if spaces
set expandtab           " expand tabs to spaces (overloadable by file type)

" -------------------------------------------------------------------
" Scrolling
" -------------------------------------------------------------------
set scrolloff=5         " show context above/below cursor line
set sidescrolloff=10    " number of cols from horizontal edge to  start scrolling
set sidescroll=1        " number of cols to scroll at a time

" -------------------------------------------------------------------
" Miscellaneous
" -------------------------------------------------------------------
" toggle listchars on or off
noremap <Leader>l :set list!<CR>

" toggle relativenumber on or off
noremap <Leader>n :set rnu! <bar> :set number!<CR>

" Paste mode to prevent autoindentation of pasted lines
set pastetoggle=<F2>

" Better pasting from clipboard
" http://tilvim.com/2014/03/18/a-better-paste.html
map <Leader>p :set paste<CR>o<esc>"*]p:set nopaste<cr>

set clipboard=unnamed   " yank and paste with the system clipboard

" show cursorline only in active window
if has("autocmd")
  autocmd WinLeave * set nocursorline
  autocmd WinEnter * set cursorline
endif

" Map escape to jj -- much faster to reach and type
imap jj <esc>

" -------------------------------------------------------------------
" Searching
" -------------------------------------------------------------------
set incsearch           " use incremental search
set hlsearch            " highlight search results
set ignorecase          " ignore case when searching
set smartcase           " ignore case if search string is all lower case, case-sensitve otherwise
" remove search highlighting with <F3>
nnoremap <silent> <leader><leader> :nohlsearch<CR>

" -------------------------------------------------------------------
" Completion
" -------------------------------------------------------------------

set wildmode=list:longest
set wildmenu                "enable ctrl-n and ctrl-p to scroll thru matches
set wildignore=*.o,*.obj,*~ "stuff to ignore when tab completing
set wildignore+=*vim/backups*
set wildignore+=*sass-cache*
set wildignore+=*DS_Store*
set wildignore+=vendor/rails/**
set wildignore+=vendor/cache/**
set wildignore+=*.gem
set wildignore+=log/**
set wildignore+=tmp/**
set wildignore+=*.png,*.jpg,*.gif

" -------------------------------------------------------------------
" Splits
" -------------------------------------------------------------------
nnoremap <leader>v <C-w>v<C-w>l   " open a vertical split and switch to it (,v)
nnoremap <leader>h <C-w>s<C-w>j   " open a horizontal split and switch to it (,h)

" -------------------------------------------------------------------
" vimrc shortcuts
" -------------------------------------------------------------------
" open vimrc in new tab for editing
nmap <leader>ev :edit $MYVIMRC<cr>

" automatically source .vimrc when it is saved (from vimcasts.org #24)
if has("autocmd")
  autocmd! bufwritepost .vimrc source $MYVIMRC
endif

" reload .vimrc
map <silent> <leader>V :source ~/.vimrc<CR>:filetype detect<CR>:exe ":echo 'vimrc reloaded'"<CR>

" -------------------------------------------------------------------
" Stuff for Bundles
" -------------------------------------------------------------------

" Settings for 'sjl/badwolf.git'
set background=dark
silent! colorscheme badwolf
let g:badwolf_darkgutter = 1 " Make the gutters darker than the background

" vim-airline configurations
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#left_sep = ' '
let g:airline#extensions#tabline#left_alt_sep = '|'
let g:airline_powerline_fonts = 1


" Settings for vim-go

" Enable to copy to clipboard for operations like yank, delete, change and put
" http://stackoverflow.com/questions/20186975/vim-mac-how-to-copy-to-clipboard-without-pbcopy
if has('unnamedplus')
  set clipboard^=unnamed
  set clipboard^=unnamedplus
endif

let g:go_fmt_command = "goimports"
let g:go_autodetect_gopath = 1
let g:go_list_type = "quickfix"
let g:go_metalinter_enabled = ['vet', 'golint', 'errcheck']
let g:go_metalinter_autosave = 1
let g:go_metalinter_autosave_enabled = ['vet', 'golint']
let g:go_metalinter_deadline = "5s"

let g:go_highlight_types = 1
let g:go_highlight_fields = 1
let g:go_highlight_functions = 1
let g:go_highlight_function_calls = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_generate_tags = 1

" Open :GoDeclsDir with ctrl-g
nmap <C-g> :GoDeclsDir<cr>
imap <C-g> <esc>:<C-u>GoDeclsDir<cr>

augroup go
  autocmd!

  " Show by default 4 spaces for a tab
  autocmd BufNewFile,BufRead *.go setlocal noexpandtab tabstop=4 shiftwidth=4

  " :GoBuild and :GoTestCompile
  autocmd FileType go nmap <leader>b :<C-u>call <SID>build_go_files()<CR>

  " :GoTest
  autocmd FileType go nmap <leader>t  <Plug>(go-test)

  " :GoRun
  autocmd FileType go nmap <leader>r  <Plug>(go-run)

  " :GoDoc
  autocmd FileType go nmap <Leader>d <Plug>(go-doc)

  " :GoCoverageToggle
  autocmd FileType go nmap <Leader>c <Plug>(go-coverage-toggle)

  " :GoInfo
  autocmd FileType go nmap <Leader>i <Plug>(go-info)

  " :GoMetaLinter
  autocmd FileType go nmap <Leader>l <Plug>(go-metalinter)

  " :GoDef but opens in a vertical split
  autocmd FileType go nmap <Leader>v <Plug>(go-def-vertical)
  " :GoDef but opens in a horizontal split
  autocmd FileType go nmap <Leader>s <Plug>(go-def-split)

  " :GoAlternate  commands :A, :AV, :AS and :AT
  autocmd Filetype go command! -bang A call go#alternate#Switch(<bang>0, 'edit')
  autocmd Filetype go command! -bang AV call go#alternate#Switch(<bang>0, 'vsplit')
  autocmd Filetype go command! -bang AS call go#alternate#Switch(<bang>0, 'split')
  autocmd Filetype go command! -bang AT call go#alternate#Switch(<bang>0, 'tabe')
augroup END

" build_go_files is a custom function that builds or compiles the test file.
" It calls :GoBuild if its a Go file, or :GoTestCompile if it's a test file
function! s:build_go_files()
  let l:file = expand('%')
  if l:file =~# '^\f\+_test\.go$'
    call go#test#Test(0, 1)
  elseif l:file =~# '^\f\+\.go$'
    call go#cmd#Build(0)
  endif
endfunction

" CtrlP configuration
let g:ctrlp_map = '<c-p>'
let g:ctrlp_cmd = 'CtrlP'
let g:ctrlp_working_path_mode = 'ra'
let g:ctrlp_custom_ignore = '\v[\/]\.(git|hg|svn)$'

" The Silver Searcher
if executable('ag')
  " Use ag over grep
  set grepprg=ag\ --nogroup\ --nocolor

  " bind K to grep word under cursor
  nnoremap <C-d> :grep! "\b<C-R><C-W>\b"<CR>:cw<CR>

  " Use ag in CtrlP for listing files. Lightning fast and respects .gitignore
  let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'

  " ag is fast enough that CtrlP doesn't need to cache
  let g:ctrlp_use_caching = 0
endif

" Dealing with Buffers more efficiently
:nnoremap <Tab> :bnext<CR>
:nnoremap <S-Tab> :bprevious<CR>
:nnoremap <C-X> :bdelete<CR>

" Set some defaults
:set nolist

" Ack.vim configuration
let g:ackprg = 'ag --vimgrep --smart-case'
cnoreabbrev ag Ack
cnoreabbrev aG Ack
cnoreabbrev Ag Ack
cnoreabbrev AG Ack