On Sun, Apr 24, 2011 at 02:05:57PM +0100, Jon TURNEY wrote: >Updating setup.exe has 3 stages: >1) Download updated setup.exe to a temporary location >2) Execute that temporary copy of setup.exe with --copy-to instructing >it to copy itself over the setup.exe to be updated >3) Execute the updated setup.exe with --remove-from instructing it >to delete the temporary copy > >A named mutex is used to ensure setup exits from each stage before >the next stage can start. > >Unfortunately, at the moment, we don't usefully check the setup version number >until after we have downloaded and parsed setup.ini, which is perhaps a bit >late to offer to update setup.exe > >v2: Address comments from Dave Korn >Properly quote arguments to ensure spaces in paths are handled safely >Place the setup URL in a string resouce > >2011-03-29 Jon TURNEY <[email protected]> > > * res.rc (IDS_OLD_SETUP_VERSION): Change text to offer to download > new version of setup. > (IDS_SETUP_URL): Added string resource. > * resource.h (IDS_SETUP_URL): Added resource identifier. > * main.cc (wait_for_exit, self_update_remove_from, > self_update_copy_to, WinMain): Add -copy-to and --remove-from options > for self-update process. > * ini.cc (self_update_download): New function to download updated > setup. > (do_ini_thread): Prompt to download updated setup if a newer > version exists. Return a result indicating what should happen > next. > * threebar.h (PropertyPage::OnFinish): Add an implementation of > OnFinish virtual function for this class. > * threebar.cc (OnFinish): Ditto. > (OnMessageApp): Setup should finish on > WM_APP_SETUP_INI_DOWNLOAD_COMPLETE > if an updated setup was downloaded. > >2011-03-29 Jon TURNEY <[email protected]> > > * include/getopt++/DefaultFormatter.h (DefaultFormatter): Fix option > string > formatting when it has no short option.
Sounds wonderful but couldn't you just rename the original setup.exe out of the way, copy a new version over it in place, and then re-execute? cgf
