[debian-mysql] Bug#853008: Bug#853008: Bug#853008: mysql-server-5.7: purge could delete mariadb-server files with inadequate warning

[Julian Gilbey]

On Mon, Jan 30, 2017 at 06:38:16PM +0000, Robie Basak wrote:
> > So how about this, just a sketch at the moment rather than a full
> > patch?
> 
> Your sketch seems good to me, assuming that "dpkg-query --search" is
> permitted from maintainer scripts (I know there are some re-entrancy
> problems with some particular types of dpkg-related invocations?)
> [...]
> 
> I wondered this too. But without thinking it through in more detail,
> it'd certainly be better than what we have now.

Please find attached a patch against the current
mysql-5.7/debian/master branch on alioth.  I have also updated the
github branch for mariadb-10.1 to address the same issue (the one with
a pull request to otto/mariadb-10.1).

It's been tested for upgrades, clean install, remove and purge.

Best wishes,

   Julian
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