SpaceVim/bundle/git.vim/autoload/git/push.vim

"=============================================================================
" push.vim --- push command for git.vim
" Copyright (c) 2016-2022 Wang Shidong & Contributors
" Author: Wang Shidong < wsdjeg@outlook.com >
" License: GPLv3
"=============================================================================

let s:JOB = SpaceVim#api#import('job')
let s:NOTI = SpaceVim#api#import('notify')

function! git#push#run(...) abort

  let cmd = ['git', 'push']
  if len(a:1) > 0
    let cmd += a:1
  endif
  call s:JOB.start(cmd, {
        \ 'on_stdout' : function('s:on_stdout'),
        \ 'on_stderr' : function('s:on_stderr'),
        \ 'on_exit' : function('s:on_exit'),
        \ }
        \ )

endfunction

function! s:on_exit(...) abort
  let data = get(a:000, 2)
  if data != 0
    for line in s:std_data.stderr
      call s:NOTI.notify(line, 'WarningMsg')
    endfor
  else
    for line in s:std_data.stderr
      call s:NOTI.notify(line)
    endfor
  endif
endfunction


function! s:on_stdout(id, data, event) abort
  for line in filter(a:data, '!empty(v:val)')
    call s:NOTI.notify(line, 'Normal')
  endfor
endfunction


" https://stackoverflow.com/questions/57016157/how-to-stop-git-from-writing-non-errors-to-stderr
"
" why git push normal info to stderr

let s:std_data = {
      \ 'stderr' : [],
      \ 'stdout' : [],
      \ }
function! s:on_stderr(id, data, event) abort
  call extend(s:std_data.stderr, a:data)
endfunction

function! s:options() abort
  return [
        \ '-u',
        \ ]
endfunction

function! git#push#complete(ArgLead, CmdLine, CursorPos) abort
  let str = a:CmdLine[:a:CursorPos-1]
  if str =~# '^Git\s\+push\s\+-$'
    return join(s:options(), "\n")
  elseif str =~# '^Git\s\+push\s\+[^ ]*$' || str =~# '^Git\s\+push\s\+-u\s\+[^ ]*$'
    return join(s:remotes(), "\n")
  else
    let remote = matchstr(str, '\(Git\s\+push\s\+\)\@<=[^ ]*')
    return s:remote_branch(remote)
  endif
endfunction

function! s:remotes() abort
  return map(systemlist('git remote'), 'trim(v:val)')
endfunction

function! s:remote_branch(remote) abort
  let branchs = systemlist('git branch -a')
  if v:shell_error
    return ''
  else
    let branchs = join(map(filter(branchs, 'v:val =~ "\s*remotes/" . a:remote . "/[^ ]*$"'), 'trim(v:val)[len(a:remote) + 9:]'), "\n")
    return branchs
  endif
endfunction