ultimate-vim/sources_non_forked/vim-go/autoload/go/play.vim

if !exists("g:go_play_open_browser")
  let g:go_play_open_browser = 1
endif


function! go#play#Share(count, line1, line2) abort
  if !executable('curl')
    echohl ErrorMsg | echomsg "vim-go: require 'curl' command" | echohl None
    return
  endif

  let content = join(getline(a:line1, a:line2), "\n")
  let share_file = tempname()
  call writefile(split(content, "\n"), share_file, "b")

  let command = "curl -s -X POST https://play.golang.org/share --data-binary '@".share_file."'"
  let snippet_id = go#util#System(command)

  " we can remove the temp file because it's now posted.
  call delete(share_file)

  if go#util#ShellError() != 0
    echo 'A error has occurred. Run this command to see what the problem is:'
    echo command
    return
  endif

  let url = "http://play.golang.org/p/".snippet_id

  " copy to clipboard
  if has('unix') && !has('xterm_clipboard') && !has('clipboard')
    let @" = url
  else
    let @+ = url
  endif

  if g:go_play_open_browser != 0
    call go#tool#OpenBrowser(url)
  endif

  echo "vim-go: snippet uploaded: ".url
endfunction


function! s:get_visual_content() abort
  let save_regcont = @"
  let save_regtype = getregtype('"')
  silent! normal! gvy
  let content = @"
  call setreg('"', save_regcont, save_regtype)
  return content
endfunction

" modified version of
" http://stackoverflow.com/questions/1533565/how-to-get-visually-selected-text-in-vimscript
" another function that returns the content of visual selection, it's not used
" but might be useful in the future
function! s:get_visual_selection() abort
  let [lnum1, col1] = getpos("'<")[1:2]
  let [lnum2, col2] = getpos("'>")[1:2]

  " check if the the visual mode is used before
  if lnum1 == 0  || lnum2 == 0  || col1 == 0  || col2 == 0
    return
  endif

  let lines = getline(lnum1, lnum2)
  let lines[-1] = lines[-1][: col2 - (&selection == 'inclusive' ? 1 : 2)]
  let lines[0] = lines[0][col1 - 1:]
  return join(lines, "\n")
endfunction

" following two functions are from: https://github.com/mattn/gist-vim
" thanks  @mattn
function! s:get_browser_command() abort
  let go_play_browser_command = get(g:, 'go_play_browser_command', '')
  if go_play_browser_command == ''
    if has('win32') || has('win64')
      let go_play_browser_command = '!start rundll32 url.dll,FileProtocolHandler %URL%'
    elseif has('mac') || has('macunix') || has('gui_macvim') || go#util#System('uname') =~? '^darwin'
      let go_play_browser_command = 'open %URL%'
    elseif executable('xdg-open')
      let go_play_browser_command = 'xdg-open %URL%'
    elseif executable('firefox')
      let go_play_browser_command = 'firefox %URL% &'
    else
      let go_play_browser_command = ''
    endif
  endif
  return go_play_browser_command
endfunction

" vim: sw=2 ts=2 et