Function libgit2_sys::git_packbuilder_write

pub unsafe extern fn git_packbuilder_write(pb: *mut git_packbuilder,
                                           path: *const c_char,
                                           mode: c_uint,
                                           progress_cb: Option<git_transfer_progress_cb>,
                                           progress_cb_payload: *mut c_void)
                                           -> c_int