Fix cgroup kselftests collection

This patch filters out kselftests binaries using python regexp, instead
of using a bash script.

libkirk/kselftests.py

@@ -5,6 +5,7 @@
 
 .. moduleauthor:: Andrea Cervesato <[email protected]>
 """
+import re
 import os
 import shlex
 import logging
@@ -51,21 +52,26 @@ async def _get_cgroup(self, sut: SUT) -> Suite:
  raise KirkException(
  f"cgroup folder is not available: {cgroup_dir}")
 
- ret = await sut.run_command(
- "basename -s .c -- test_*.c",
- cwd=cgroup_dir)
+ ret = await sut.run_command("ls -1 test_*", cwd=cgroup_dir)
  if ret["returncode"] != 0 or not ret["stdout"]:
  raise KirkException("Can't read cgroup tests")
 
- names = [n.rstrip() for n in ret["stdout"].split('\n')]
+ # we want to loop into a list rather than using one regexp that
+ # rules everything. In this way we are not dependent by ls format
+ names = ret["stdout"].split('\n')
+ if not names:
+ raise KirkException("Can't find cgroup tests")
+
+ match = re.compile(r'^test_[^.]+$')
  tests_obj = []
 
  for name in names:
- if not name:
+ myname = match.search(name)
+ if not myname:
  continue
 
  tests_obj.append(Test(
- name=name,
+ name=myname,
  cmd=os.path.join(cgroup_dir, name),
  cwd=cgroup_dir,
  parallelizable=False))