my vim-go mappings

.vimrc

" run :GoBuild or :GoTestCompile based on the go file
function! s:build_go_files()
  let l:file = expand('%')
  if l:file =~# '^\f\+_test\.go$'
    call go#cmd#Test(0, 1)
  elseif l:file =~# '^\f\+\.go$'
    call go#cmd#Build(0)
  endif
endfunction

augroup go
  autocmd!

  autocmd FileType go nmap <silent> <Leader>v <Plug>(go-def-vertical)
  autocmd FileType go nmap <silent> <Leader>s <Plug>(go-def-split)

  autocmd FileType go nmap <silent> <Leader>i <Plug>(go-info)
  autocmd FileType go nmap <silent> <Leader>l <Plug>(go-metalinter)

  autocmd FileType go nmap <silent> <leader>b :<C-u>call <SID>build_go_files()<CR>
  autocmd FileType go nmap <silent> <leader>t  <Plug>(go-test)
  autocmd FileType go nmap <silent> <leader>r  <Plug>(go-run)
  autocmd FileType go nmap <silent> <leader>e  <Plug>(go-install)

  autocmd FileType go nmap <silent> <Leader>d <Plug>(go-doc)
  autocmd FileType go nmap <silent> <Leader>c <Plug>(go-coverage-toggle)

  " I like these more!
  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