[debian-mysql] Introducing default-mysql-* metapackages

[Rene Engelhard]

Hi,

On Sun, Jul 10, 2016 at 05:22:22PM +0300, Otto Kekäläinen wrote:
> Hello maintainers of packages that depend in MySQL/MariaDB!

Not everyone is required to read -devel. Mailing them where they read
it (and be it Cc'ing them) would be better.

I am subscribed to -devel but still missed this mail (though I knew there
was something ongoing)

> BEFORE: Build-Depends: libmysqlclient-dev
> AFTER: Build-Depends: default-libmysqlclient-dev
> 
> BEFORE: Depends: mysql-server | virtual-mysql-server OR Depends:
> mariadb-server | virtual-mysql-server
> AFTER: Depends: default-mysql-server | virtual-mysql-server
> 
> BEFORE: Depends: mysql-client | virtual-mysql-client OR Depends:
> mariadb-client | virtual-mariadb-client
> AFTER: Depends: default-mysql-client | default-mysql-client
                                         ^^^^^^^^^^^^^^^^^^^^
ITYM virtual-mysql-client :)

> If a maintainer knows that his/her package only works with one
> variant, then the package can depend directly on that package and not
> use the default-mysql-* (matches one) or virtual-mysql-* (matches any)
> schemes. Please get in touch if this applies to you. At the moment
> there should be no such packages, but in the future cases like this
> can arise when MySQL and MariaDB develop diverging feature sets.

Well, I know of packages needing MySQL 5.7 and/or failing to build against
MariaDB for other reasons. e.g. mysql-connector-c++. Upstream is Oracle,
so they obviously won't care about MariaDB..

> Packages built against default-mysqlclient-dev and link using
> "-lmysqlclient" will end up with a shared library dependency on either
> libmysqlclient.so.X or libmariadbclient.so.X depending on the default
> defined by the release team at build time. These will be provided by
> the libmysqlclient18 (soon to be libmysqlclient20) and
> libmariadbclient18 packages, which will be co-installable. Packages
> which require particular functionality available from only one of the
> forks may Build-Depend directly on libmysqlclient-dev or
> libmariadbclient-dev and then link using "-lmysqlclient" or
> "-lmariadbclient" respectively. Again, please get in touch if this
> applies to you.

See above.

So this one could still use libmysqlclient-dev?

Or we keep a working version with MariaDB, but then again there's other
packages like mysql-workbench also wanting 1.1.7 (and thus MySQL 5.7)...

> The default-mysql-* metapackages will be uploaded to Experimental soon
> and to Unstable once we are confident there are no regressions. Once
> they are available in Unstable, we will announce this on

I have seen those accepted in unstable this morning so.. :)

Regards,

Rene