kernelci.build: add kselftest artifacts

Add artifacts for kselftest with a list of all the directories that
have tests "emitted" by the build.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Author: gctucker

kernelci/build.py

@@ -1220,6 +1220,17 @@ def run(self, jopt=None, verbose=False):
                          'tools/testing/selftests')
         return self._add_run_step(jopt, res)
 
+    def _get_kselftests(self, kselftest_tarball):
+        with tarfile.open(kselftest_tarball, 'r:xz') as tarball:
+            kselftests = set(
+                path for path in (
+                    os.path.split(os.path.relpath(entry.name))[0]
+                    for entry in tarball
+                )
+                if path
+            )
+        return kselftests
+
     def install(self, verbose=False):
         """Install the kselftest tarball
 
@@ -1236,6 +1247,8 @@ def install(self, verbose=False):
         res = os.path.exists(kselftest_tarball)
         if res:
             self._install_file(kselftest_tarball, verbose=verbose)
+            kselftests = self._get_kselftests(kselftest_tarball)
+            self._artifacts['kselftest'] = kselftests
 
         return super().install(verbose, res)