.vimrc

" Info: Showing python3 version and site info in vim
" py3 import sys, site; print('Version:', sys.version); print('Executable:', sys.executable); print('Site Packages:', site.getsitepackages())

" Find the python version 
" Order is important here, first python used is now ONLY python avaialable
" https://robertbasic.com/blog/force-python-version-in-vim/
if has("python3")
    python3 import vim; from sys import version_info as v; vim.command('let python_version=%d' % (v[0] * 100 + v[1]))
elseif has("python")
    python import vim; from sys import version_info as v; vim.command('let python_version=%d' % (v[0] * 100 + v[1]))
else
    let python_version=0
endif

" Only use powerline with python3
if has("python3")
    python3 from powerline.vim import setup as powerline_setup
    python3 powerline_setup()
    python3 del powerline_setup
endif

" Install vim-plug if not already present
" See: https://github.com/junegunn/vim-plug/wiki/tips#automatic-installation
if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall | source $MYVIMRC
endif

" Run PlugInstall if there are missing plugins
autocmd VimEnter * if len(filter(values(g:plugs), '!isdirectory(v:val.dir)'))
  \| PlugInstall --sync | source $MYVIMRC
\| endif

" vim plug-ins
call plug#begin('~/.vim/plugged')

" Git integration plugin
" See: https://vimawesome.com/plugin/fugitive-vim
Plug 'tpope/vim-fugitive'

" Per project editor configuration settings
" See: https://vimawesome.com/plugin/editorconfig-vim
Plug 'editorconfig/editorconfig-vim'

" File tree browser
" Use :NERDTree to open file browser window
" See: https://vimawesome.com/plugin/nerdtree-red
Plug 'scrooloose/nerdtree'

" Source code tag browser
" https://vimawesome.com/plugin/taglist-vim
Plug 'vim-scripts/taglist.vim'

call plug#end()

" Function Key Mappings
" Press F4 to toggle highlighting on/off, and show current value.
noremap <F4> :set hlsearch! hlsearch?<CR>
nnoremap <F5> :buffers<CR>:buffer<Space>
nnoremap <F8> :let @/='\<<C-R>=expand("<cword>")<CR>\>'<CR>:set hls<CR>
set pastetoggle=<F10>	" Use F10 to toggle between :paste and :nopaste

" vim behavior changes
set autowrite		" Automatically :write before running commands
set backspace=2		" Backspace deletes like most programs in insert mode
set diffopt=vertical,filler	" vmdiff settrings
set guioptions-=e
set history=50
set hlsearch		" Highlight matching search terms
set incsearch		" do incremental searching
set laststatus=2
set listchars=eol:¬,tab:>·,trail:~,extends:>,precedes:<,space:·
set mouse-=a		" Right mouse click inserts text, not enable visual mode
set nolist
set nobackup
set noswapfile		" http://robots.thoughtbot.com/post/18739402579/global-gitignore#comment-458413287
set nowritebackup
set scrollbind		" Scroll windows together, for vmdiff
set showcmd		" display incomplete commands
set showtabline=2
set ttymouse=xterm2

" Quicker window movement
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-h> <C-w>h
nnoremap <C-l> <C-w>l

" More intuitive ctags matching
nnoremap <C-]> g<C-]>

" Show function list side window
nnoremap <C-l> :TlistToggle<CR>

" Map NERDTree viewport to CTRL+t
nnoremap <C-t> :NERDTreeToggle<CR>
" Exit Vim if NERDTree is the only window left.
autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
    \ quit | endif

" Enable spell check per filetype
autocmd FileType mail setlocal spell spelllang=en_us
autocmd FileType gitcommit setlocal spell spelllang=en_us
autocmd BufRead COMMIT_EDITMSG setlocal spell spelllang=en_us
autocmd BufNewFile,BufRead *.md,*.mkd,*.markdown,*.txt,*.patch set spell spelllang=en_us

" Allow local customizations to .vimrc outside of git repository dotfiles
if filereadable($HOME . "/.vimrc.local")
  source ~/.vimrc.local
endif


" Useful python tricks
" Show the python executable used by vim
" :echo exepath('python3')
"
" Show the python version
" :python3 import sys; print(sys.version)
"
" Show the python modules accessible by vim's python
" :python3 help('modules')
"
" Show site-package locations
" :python3 import sys, site; print('Version:', sys.version); print('Executable:', sys.executable); print('Site Packages:', site.getsitepackages())

" Check if python supported and get the version
" 204 = 2.4, 307 = 3.7, etc.