Re: https://github.com/ilbers/hello conflicts with upstream hello

[Henning Schild <henning.schild@siemens.com>]

Am Thu, 17 Jan 2019 17:54:40 +0100
schrieb Baurzhan Ismagulov <ibr@radix50.net>:

> On Thu, Jan 17, 2019 at 05:10:02PM +0100, Henning Schild wrote:
> > Yes, but conflicts that are known are mentioned in the metadata.
> > (debian/control)
> > So apt sees it before dpkg unpacks it and finds it.  
> 
> Conflicts: isn't the only way to handle various kinds of
> interoperability problems that arise in a large distribution like
> Debian. There are also diversions, which allow installing packages
> with conflicting files by renaming them in a controlled way after
> installation.
> 
> 
> > I just sent a series that shows the problem. You can also see it if
> > you IMAGE_INSTALL=example-hello and IMAGE_PREINSTALL=hello  
> 
> I see, thanks.
> 
> I think we should use this opportunity to also rename the source
> package to hello-isar to avoid conflicts with apt-get source hello.

In that case is might also be a good idea to align the PN with the
changed name. hello -> hello-isar and example-hello > hello-isar

> > That or the metadata should know about the conflict. We can not
> > change upstream metadata, maybe one side is good enough.  
> 
> Conflicts: on the Isar side would be enough to make the packages
> incompatible, but apt-get installing example-hello after hello would
> fail.
> 
> 
> > One way or another. My series adds the feature to rebuild an
> > upstream package, and hello is a very good example for that. A
> > conflict would mean we could not test example-hello and hello in
> > the same image, so avoiding the conflict will be useful for that
> > case and not overkill.  
> 
> I agree that using upstream hello would be nice. An alternative could
> be building e.g. arc for the time being. In parallel, Maxim has
> started fixing example-hello. I'd prefer merging your code without
> breaking example-hello.

I am not in a hurry with that being merged. We could just drop the
patch that currently removes example-hello from the build, after the
renaming is done.

Henning

> 
> With kind regards,
> Baurzhan.
>