[yocto] Cleanly moving files from one package to another

[Martin Jansa]

On Thu, Dec 10, 2015 at 02:15:05PM +0000, Bryan Evenson wrote:
> Martin,
> 
> > -----Original Message-----
> > From: Martin Jansa [mailto:martin.jansa at gmail.com]
> > Sent: Thursday, December 10, 2015 4:20 AM
> > To: Bryan Evenson <bevenson at melinkcorp.com>
> > Cc: yocto at yoctoproject.org
> > Subject: Re: [yocto] Cleanly moving files from one package to another
> > 
> > On Wed, Dec 09, 2015 at 08:19:40PM +0000, Bryan Evenson wrote:
> > > All,
> > >
> > > I'm on poky/dizzy-1.7.3 and I'm using opkg for a package manager.  I have a
> > few script files that are part of one package that really belong with another.
> > So I updated both recipes, removed the file from one recipe and added it to
> > the other recipe.  I built everything, made the opkg feed repo and tried to
> > upgrade with "opkg update; opkg upgrade" to see how clean the upgrade
> > was.  For each script file I moved from one package to the other I get an error
> > message of the form:
> > >
> > > * check_data_file_clashes: Package A wants to install file
> > /path/to/script/file
> > >         But that file is already provided by package  * B
> > >
> > > I know I can do "opkg upgrade --force-overwrite", but I'd like to make
> > recipe changes so that it upgrades cleanly.  All I've done in the recipes is
> > remove the script files from the FILES variable and the do_install step of one
> > recipe and added the script to the FILES variable and do_install step of the
> > other recipe.  I know update-alternatives can be used if more than one
> > package provides the same binary, but is that necessary in this case when
> > transferring ownership to another package?  Is there anything else I can do in
> > the recipes to prevent the opkg install errors?
> > 
> > Have you tried to set
> > RREPLACES_<pkg-new> = "<pkg-old>"
> > ?
> 
> I haven't tried that because I'm not replacing a package.  Both packages still exist on the system and are both needed, it's just that ownership of one of the files is being transferred from one package to another.  Would I still use RREPLACES even if I want to keep both packages on the system?
> 
> Specifically in this case, I have some script files for scheduled tasks that were part of one of my self-made packages.  However, they really belong with cronie since this is what is calling the scripts.  So I removed the script files from my self-made package and added them to cronie.  My package has other files still associated with it (that do belong with it) installed on my system.  So I want to keep both packages on my system, but I just want to change ownership of these script files from my package to cronie.  Is RREPLACES the tool for this job?

> Is RREPLACES the tool for this job?

Yes, see
https://www.debian.org/doc/debian-policy/ch-relationships.html#s-replaces

opkg should work the same.

> > If the old package should be removed completely during opkg upgrade, then
> > you'll need to set whole combo, that is RREPLACES,RCONFLICTS,RPROVIDES.

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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