When a variant has optional, it is possible to explictly list it in the
XML file and add extra groups. However, the original DTD did not allow
multiple variants with `id="optional"` as `id` attribute has to be
globally unique. This patch changes its type to `CDATA`, which has less
restrictions. This also means we can no longer define `<ref>` as
`IDREF` and instead check the existence of referenced variant in parser.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
The variants.xml file can list a variant with is_empty="true" and no
groups. If such variant is found, not package gathering will be run for
it, and no repos will be created.
This only makes sense for a variant that will have some other
deliverables like live media or images.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
This patch updates the variants DTD and parsing to allow specifying
multiple build install packages for each variant.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
CHANGE: Rename product_* config options to release_* for consistency with productmd.
ACTION: Rename product_name, product_short, product_version, product_is_layered to release_* in config files.
Rename //variant/product to //variant/release in variants XML.
