Fedora CI: Run mock on the current Fedora version (or 31 if less than 31)

tests/mocktest.sh

@@ -1,12 +1,20 @@
 #!/usr/bin/bash -eux
+. /etc/os-release
+fedora=$VERSION_ID
 
-config="/tmp/fedora-rawhide-x86_64-ci.cfg"
+# we don't have dynamic BuildRequires on Fedora 30
+# so we at least test that we can build in a Fedora 31 mock
+if [ $fedora -lt 31 ]; then
+  fedora=31
+fi
+
+config="/tmp/fedora-${fedora}-x86_64-ci.cfg"
 
 # create mock config if not present
 # this makes sure tested version of pyproject-rpm-macros is available
 # TODO: check if it has precedence if the release was not bumped in tested PR
 if [ ! -f $config ]; then
-  original="/etc/mock/fedora-rawhide-x86_64.cfg"
+  original="/etc/mock/fedora-${fedora}-x86_64.cfg"
   split=$(sed -n '/\[fedora\]/=' $original | head -n1)
   head -n$(($split-1)) $original > $config
   cat /etc/yum.repos.d/test-pyproject-rpm-macros.repo >> $config
@@ -29,7 +37,7 @@ mock -r $config --enablerepo=local ~/rpmbuild/SRPMS/${1}-*.src.rpm || res=$?
 
 # move the results to the artifacts directory, so we can examine them
 artifacts=${TEST_ARTIFACTS:-/tmp/artifacts}
-pushd /var/lib/mock/fedora-rawhide-x86_64/result
+pushd /var/lib/mock/fedora-*-x86_64/result
 mv *.rpm ${artifacts}/ || :
 for log in *.log; do
  mv ${log} ${artifacts}/${1}-${log}