Imagine we have "platform:f29.0.0" and "platform:f29.1.0" base modules.
We also have "DBI" module we want to build agaisnt "platform:f29.1.0".
This "DBI" module depends on "perl" module which is only build against
"platform:f29.0.0".
Currently, DBI build would fail to resolve the dependencies, because
it wouldn't find "perl" module, because it is built against different
platform stream.
This PR changes the MSE code to include buildrequired module builds built
against all the compatible platform streams.
It does so by introducing following changes:
- MSE code uses new get_base_module_mmds() method to find out all the
compatible platform modules. This needed new methods in DBResolver
and MBSResolver.
- For each buildrequired module defined by name:stream, the MSE code then
finds particular NSVC built against each compatible platform module.
Side effect of these code changes is that every module now must buildrequire
some base module.
_get_mmds_from_requires does not do anything against db.session. Hence,
remove parameter session from it and
get_mmds_required_by_module_recursively.
Signed-off-by: Chenxiong Qi <cqi@redhat.com>
TestUtilsModuleStreamExpansion._make_module is moved to
tests/__init__.py so that other tests could reuse this to create a
module build.
Signed-off-by: Chenxiong Qi <cqi@redhat.com>
Modularity team needs to be able to define multiple streams for single "platform"
module. They need it to express that "platform:el8.1.0" also provides "platform:el8".
This needs changes in a way how MMDResolver resolves dependencies between modules.
For example, if we are building module against platform:el8.1.0, the MMDResolver must
not return buildrequired module built against platform > el8.1.0, but it can for example
return (cherry-pick) buildrequired module from platform:el8.0.0 if there is no such
module built for platform:el8.1.0.
The way how it is implemented is following:
- MMDResolver reads list of virtual streams from xmd["mbs"]["virtual_streams"] when
creating Solvable from MMD and adds additional Provides for these virtual streams.
We expect these to be set mainly on base modules. The versions of such provides
are based on "stream version" number, so we can compare them.
- The base module ("platform") buildrequires of MMDs added to MMDResolver are overriden
to mark particular platform "stream version". For example, if module "foo" buildrequires
"platform:el8" in MMD file, but was in fact built against platform:el8.1.0, it will
be treated as if it would really buildrequire "platform:el8.1.0". This is needed
to not include buildrequired modules built against newer platform than what we want.
- MMDResolver resolves all the valid combinations of buildrequires, but we are only
interested in the one with latest versions of buildrequired module. Therefore the
solve() method is changed to find out combinations which have the latest versions
for each alternative name:stream buildrequires.
1. Changed ModuleBuild's context property to db column, it's
non-nullable and default value is '00000000' to keep it consistent
with previous behaviour.
2. Changed ModuleBuild.contexts_from_mmd to return a tuple of
(ref_build_context, build_context, runtime_context, context).
3. Updated tests affected by this change.
