Call for comments - pkg_trans

[Ivan Voras]

Marcin Wisnicki wrote:
> On Thu, 31 Jul 2008 06:25:27 +0200, Ivan Voras wrote:
> 
>> Hi,
>>
>> I apologize in advance if what I'm trying to do seems stupid or it has
>> already existed since the Dawn of Time (i.e. when McKusick was in
>> diapers) but I'd like your comments on this idea:
>>
>> http://wiki.freebsd.org/IvanVoras/PkgTransProposal
> 
> Looking at your use cases I think what you are proposing is overkill.

Wow, and I was afraid I'm doing an underkill here :)

> * Install some large group of packages, like KDE or GNOME. Don't like it, 
> want to delete all packages installed during the operation.
> 
> This could be achieved by tracking which ports were installed explicitly 
> by user. I.e. when I type:
>   (cd /usr/ports/x11/gnome2; make install)
> or
>   pkg_add -r gnome2
> 
> It will install gnome2 along with it's dependencies but in some way mark 
> gnome2 package as installed by user, say, by creating /var/db/pkg/
> gnome2-2.22/+USER_INSTALLED or even easier, by maintaing some special 
> unremovable dummy package that would depend on all packages installed 
> explicitly.

This has the same problems as my scheme and I'm not sure the benefits 
are the same. With pkg_trans, we know explicitly which packages were 
pulled in when, and the order in which they were pulled.

> * Install a newer version of postgresql, have an OMG moment and remember 
> you need to dump the database with the old version and reaload it with 
> the new version. Revert the install by deleting the new packages and 
> reinstalling the old ones (i.e. undo a removal).
> 
> pkg_deinstall -R posgtresql-8.4.0; pkg_add postgresql-8.3.0

Yes, with the exception that something needs to do "pkg_create -b 
postgresql-8.3.0" before it's removed, and I don't trust myself to 
remember this every time :) (I want it to happen automatically)


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