[Bug 463381] Re: moodle package is lacking critical dependancy on php-db

[Dan Shields]

It appears to only affect the mysql-server choice.  The postgres choice is
fine.

You were right to suggest the /var/log/dpkg.log file, it shows that the
php5-mysql package was not installed with moodle.   Examining the moodle
control file, I see that it uses the expression:

Depends: ... php5-pgsql | php5-mysql, ...

And I consult with Debian Policy in order to understand the '|' thingy:
http://www.debian.org/doc/debian-policy/ch-relationships.html

>"In the Depends, Recommends, Suggests, Pre-Depends, Build-Depends and
Build-Depends-Indep control file fields of the package, which >declare
dependencies on other packages, the package names listed may also include
lists of alternative package names, >separated by vertical bar (pipe)
symbols |. In such a case, if any one of the alternative packages is
installed, that part of the >dependency is considered to be satisfied. "

Now, I am sure that the original intent of the depends line is to somehow
make the moodle package work equally well with both postgres and mysql.
However, given this expression aptitude always installs php5-pgsql
regardless of the selection of which server the administrator wants to use.
This means moodle with postgres works out of the box, and moodle with mysql
does not.

I must confess I was totally wrong initially, the problem is not php-db, but
rather the lack of php5-mysql.  An easy workaround is to depend on both
(Depends: ...php5-pgsql, php5-mysql ...) equally.  So far as I know, these
packages do not logically conflict nor provide conflicting paths.

On Thu, Oct 29, 2009 at 12:50 PM, Jeremy Bicha <jeremy at bicha.net> wrote:

> I can't duplicate this bug on a new Karmic install followed by sudo
> aptitude install moodle. Moodle appears to work just fine without php-
> db. Did you do anything unusual when attempting to install moodle? Did
> you choose postgresql or mysql ?
>
> Could you please attach a copy of /var/log/dpkg.log ?
>
> ** Changed in: moodle (Ubuntu)
>       Status: New => Incomplete
>
> --
> moodle package is lacking critical dependancy on php-db
> https://bugs.launchpad.net/bugs/463381
> You received this bug notification because you are a direct subscriber
> of the bug.
>


** Attachment added: "dpkg.log"
   http://launchpadlibrarian.net/34638751/dpkg.log

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moodle package is lacking critical dependancy on php-db
https://bugs.launchpad.net/bugs/463381
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