vimscript to set proxy icon in iTerm2

proxy_icon.vim

function! ITerm2ProxyIconTitle(wait) abort
    if a:wait
        sleep 10m // when resuming to foreground it only works if waits some time (don't ask me why)
    endif

    let arg = "\e]1337;SetProxyIcon=" . expand('%:p') . "\<c-G>"

    if has('nvim')
        call chansend(2, arg)
    else
        let cmd = 'silent !printf "' . arg . '"'
        execute cmd
        redraw!
        redraw!
    endif
endfunction


if $TERM_PROGRAM =~ "iTerm"
    augroup proxy_icon
        autocmd BufEnter,FocusGained * call ITerm2ProxyIconTitle(0)
        if has('nvim')
            autocmd VimResume * call ITerm2ProxyIconTitle(1)
        endif
    augroup END
endif