Francesco Riosa wrote:
> Background, to make life easyer for people that use more versions of
> mysql (and just for fun) MySQL is going to be slotted.
>
> Currently the slot enabled versions are mysql-4.1.16-r30
> mysql-5.0.18-r30 mysql-5.1.4_alpha-r30, in short those with "-r30".
>
> The few patches needed are already included in current ~ mysql-4.1.16
> and mysql-5.0.18 but hidden due to SLOT=0, starting from 2005-11
>
> An eselect-mysql module has been prepared to create simlinks for the
> desired version of mysql making easy to switch between them (hopefully)
>
> The libraries (libmysqlclient & co) don't follow this logic and the
> higher version is always the default (similarly to sys-libs/db).
So how does this affect packages that use say dev-perl/DBD-mysql ?
If they can only use mysql-5, then the will be broken if they connect to a
mysql-4 server using non
UTF-8 encoding. (bad wording, but generally speaking, there is an inconsistence
in character
encoding betweet mysql-4 and mysql-5 that DOES break things on non ISO-8859-1
encoded databases)
> The rc-scripts have been modified to use the logic of
> sys-apps/baselayout net.ethx => net.lo symlink to be able to start more
> servers at once (this is working from 2005-11 but reworked today)
>
> Additionally the ebuilds code has been moved to two new eclasses,
> mysql_fx.eclass and mysql.eclass, the first own support functions, the
> last own the src_* pkg_* functions.
> The initial idea is that when a specific ebuild need to marked stable
> the code is moved from the mysql.eclass to the ebuild itself, to froze it.
>
> Documentation on:
> o switch to slotted
> o upgrade with no downtime using this new capabilities
> need to be written from scratch (this is going to be the more difficult
> part for me).
>
> there is a bash construct the eclass use to retrieve the latest two
> chars of a string, in the form: MYVAR="${MYARRAY[3]:(-2)}" , is this
> acceptable?
>
> The intention is to made mysql-5.0.18-r30 stable on 2005-02-15 at
> maximum on the first archs.
>
> AFAIK I'm the only one who have seen this stuff until now, any comment,
> any suggestion is highly apreciated.
Kalin.
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