❦ 29 septembre 2012 13:01 CEST, Andreas Beckmann <deb...@abeckmann.de> :
>> Thanks for the pointers! I now understand why this does not
>> work. Fixing in postinst is quite difficult since I have swapped
>> symlinks and, from the bug reports, successive installs make the
>> situation worst (things got installed in the wrong place).
>>
>> Well, I need to work a bit on this.
>
> I think a working approach is:
>
> * directory to symlink
> fix it up in the postinst (at postinst, the directory should have
> become "empty"):
> if [ -d $X ] && [ ! -L $X ]; then
> rmdir $X # bombs if not empty
> ln -s $target $X
> fi
In fact, because I have swapped symlinks in the past, the initial
directory does not become empty. In a version, I have:
/usr/share/roundcube/plugins -> /var/lib/roundcube/plugins
/var/lib/roundcube/plugins/plugin1
And in the new version, I have:
/var/lib/roundcube/plugins/plugin1 -> /usr/share/roundcube/plugins/plugin1
/var/lib/roundcube/plugins/plugin2 -> /usr/share/roundcube/plugins/plugin2
Unfortunately, when the user has upgraded from 1 to 2, he has:
/usr/share/roundcube/plugins -> /var/lib/roundcube/plugins
/var/lib/roundcube/plugins/plugin1
/var/lib/roundcube/plugins/plugin2
Of course, there is still a solution, but it becomes a bit complex and I
may create new bugs from it...
> * symlink to directory
> remove symlinks in the preinst to avoid installing stuff at the wrong
> place
> test ! -L $X || rm $X
This is too late since the culprit package is already in stable.
--
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* For moronic filesystems that do not allow holes in file.
* We may have to extend the file.
*/
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