MockModuleBuilder: add artifacts to artifacts not components

The built RPM artifacts were being added to the components list (the
RPMs to build) instead of the proper artifacts section. Also, they
need to be in NEVRA format, so use 'rpm -qf' to query the epochs from
the built artifacts.

module_build_service/builder/MockModuleBuilder.py

@@ -29,6 +29,7 @@ import kobo.rpmlib
 import pipes
 import platform
 import re
+import subprocess
 import threading
 
 from module_build_service import conf, log, Modulemd
@@ -174,24 +175,35 @@ class MockModuleBuilder(GenericBuilder):
         # Generate the mmd the same way as pungi does.
         m1 = ModuleBuild.query.filter(ModuleBuild.name == self.module_str).one()
         m1_mmd = m1.mmd()
-        for rpm in os.listdir(self.resultsdir):
-            if not rpm.endswith(".rpm"):
-                continue
+        artifacts = Modulemd.SimpleSet()
+
+        rpm_files = [f
+                     for f in os.listdir(self.resultsdir)
+                     if f.endswith(".rpm")]
+
+        output = subprocess.check_output(['rpm',
+                                          '--queryformat',
+                                          '%{NAME} %{EPOCHNUM} %{VERSION} %{RELEASE} %{ARCH}\n',
+                                          '-qp'] + rpm_files,
+                                         cwd=self.resultsdir,
+                                         universal_newlines=True)
+        nevras = output.strip().split('\n')
+        if len(nevras) != len(rpm_files):
+            raise RuntimeError("rpm -qp returned an unexpected number of lines")
+
+        for rpm_file, nevra in zip(rpm_files, nevras):
+            name, epoch, version, release, arch = nevra.split()
 
             if m1.last_batch_id() == m1.batch:
                 # If RPM is filtered-out, do not add it to artifacts list.
-                nvr = kobo.rpmlib.parse_nvr(rpm)
-                if nvr["name"] in m1_mmd.get_rpm_filter().get():
+                if name in m1_mmd.get_rpm_filter().get():
                     continue
 
-            pkglist_f.write(rpm + '\n')
-            rpm = rpm[:-len(".rpm")]
-            component = Modulemd.ComponentRpm()
-            component.set_name(str(rpm))
-            component.set_rationale('none')
-            m1_mmd.add_rpm_component(component)
+            pkglist_f.write(rpm_file + '\n')
+            artifacts.add('{}-{}:{}-{}.{}'.format(name, epoch, version, release, arch))
 
         pkglist_f.close()
+        m1_mmd.set_rpm_artifacts(artifacts)
 
         mmd_path = os.path.join(path, "modules.yaml")
         m1_mmd.dump(mmd_path)