[OE-core] what is "packagegroup-core-nfs-server"?

[Robert P. J. Day]

On Wed, 28 Nov 2012, Paul Eggleton wrote:

... snip for brevity...

> So the bit that might be missing here is that the PACKAGE_GROUP
> structure and the packagegroup recipes/class are actually not really
> related, except that the latter may be used to populate the former.
> "packagegroup" is the new name for what used to be known as a "task"
> in versions before danny and much better reflects what these recipes
> do. PACKAGE_GROUP_* actually came first as a way to define items for
> IMAGE_FEATURES that map to one or more packages, and I'm not sure
> the name choice was a particularly good one - I wonder if it would
> be worth considering renaming it to something like
> IMAGE_FEATURE_PACKAGES in order to avoid confusion, although
> obviously every rename like this has a cost associated.
>
> In any case, I would definitely recommend using the term "package
> group" to refer to packagegroup recipes only, otherwise you're only
> likely to increase people's level of confusion.

  one more observation just to mess things up a bit more -- the fact
that, despite what one reads in core-image.bbclass, the IMAGE_FEATURES
variable can be used to customize your image in ways that have nothing
to do with packages or package groups.

  witness this from meta/classes/rootfs_ipk.bbclass:

        if ${@base_contains("IMAGE_FEATURES", "read-only-rootfs", "true", "false" ,d)}; then
                if grep Status:.install.ok.unpacked ${STATUS}; then
                        echo "Some packages could not be configured offline and rootfs is read-only."
                        exit 1
                fi
        fi

so there's a potential "image feature" called "read-only-rootfs" which
is clearly not a package group or a package, and of which there is no
mention in core-image.bbclass.

  i had a nice little tutorial going for IMAGE_FEATURES, now i'm going
to have to go back and rethink it.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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