test: Allow running only a subset of integration tests by setting SELECTED_TESTS

libfido2 was pulled in recently [1], and the dependency on libzstd has been
present for a long time.

nano is now the default editor in Fedora [2], but we still want to pull it in
to have an editor in minimal images.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1949505
[2] https://fedoraproject.org/wiki/Changes/UseNanoByDefault

.mkosi/mkosi.fedora

@@ -65,9 +65,6 @@ BuildPackages=
 
 Packages=
         gdb
-        # libfido2 + libzstd can be dropped once the Fedora RPM gets a dependency on them
-        libfido2
-        libzstd
         nano
         # procps-ng provides a set of useful utilies (ps, free, etc)
         procps-ng

test/run-integration-tests.sh

@@ -60,17 +60,19 @@ pass_deny_list() {
     return 0
 }
 
+SELECTED_TESTS="${SELECTED_TESTS:-TEST-??-*}"
+
 # Let's always do the cleaning operation first, because it destroys the image
 # cache.
 if [ $CLEAN = 1 ]; then
-    for TEST in TEST-??-* ; do
+    for TEST in $SELECTED_TESTS; do
         ( set -x ; make -C "$TEST" clean )
     done
 fi
 
 # Run actual tests (if requested)
 if [[ $args =~ [a-z] ]]; then
-    for TEST in TEST-??-* ; do
+    for TEST in $SELECTED_TESTS; do
         COUNT=$(($COUNT+1))
 
         pass_deny_list $TEST || continue