Hello, On Thu, 15 Dec 2011, Gianluca Ciccarelli wrote: > I've read dpkg-maintscript-helper's man page. We want some commands in > the script, invoked by the maintainer scripts always as: > dpkg-maintscript-helper <my_command_name> <options> \ > -- "$@" > > that executes differently according to the value of the variable > DPKG_MAINTSCRIPT_NAME. Let's assume I want to address the first issue, > that is, move away a directory $dir and substitute it with a symlink > with the same name.
So $dir is part of the <options> above. We also need the first version that contains the directory instead of the symlink so that we can do the command only when required (and not on future upgrades). > In the preinst script, "upgrade" command, I'd invoke the helper as > above, and it will result in something like (as per Raphael's > suggestions): > 1) # Ensure ownership of $dir by the package > 2) mv "$dir" "$dir".dpkg_bak > > In postinst, command "configure", I'd have > 1) rm -rf "$dir".dpkg_bak Yes. > and finally, in postrm upgrade I'd have: > 1) mv "$dir".dpkg_bak "$dir" Here it should be "postrm failed-upgrade" I think. And it should not fail if $dir.dpkg_bak does not exist (the failure to upgrade might be due to something else and maybe that dir doesn't exist yet). BTW for consistency please use ".dpkg-bak" and not ".dpkg_bak". Cheers, -- Raphaël Hertzog ◈ Debian Developer Pre-order a copy of the Debian Administrator's Handbook and help liberate it: http://debian-handbook.info/liberation/ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
