oeqa/selftest/reproducibility: restart bitbake for each build

Since [0], the reproducibility test tries to save logs of failed builds.
Using the memory persistent bitbake prevent this by concatenating logs in the
single persistent instance (See [YOCTO #15641]).
So, force a BitBake server restart for each build to ensure a new log
file is created.

This fixes this error (seen on AB [1]):
  2024-11-02 08:16:00,816 - oe-selftest - ERROR - reproducibleA build failed. Trying to compute built packages differences but the test will fail.
  2024-11-02 08:16:00,819 - oe-selftest - INFO -  ... ERROR
  2024-11-02 08:16:00,819 - oe-selftest - INFO - Traceback (most recent call last):
    File "/srv/pokybuild/yocto-worker/reproducible-meta-oe/build/meta/lib/oeqa/selftest/cases/reproducible.py", line 321, in test_reproducible_builds
      self.copy_file(variables["BB_CONSOLELOG"], os.path.join(save_dir, "bitbake-%s.log" % name))
    File "/srv/pokybuild/yocto-worker/reproducible-meta-oe/build/meta/lib/oeqa/selftest/cases/reproducible.py", line 216, in copy_file
      shutil.copyfile(source, dest)
    File "/usr/lib/python3.11/shutil.py", line 256, in copyfile
      with open(src, 'rb') as fsrc:
           ^^^^^^^^^^^^^^^
  FileNotFoundError: [Errno 2] No such file or directory: '/srv/pokybuild/yocto-worker/reproducible-meta-oe/build/build/build-st-meta-python/build-st/tmp/log/cooker/qemux86-64/20241102071141.log'

[0]: https://git.openembedded.org/openembedded-core/commit/?id=c78cc753843d4199443052e8deb0c9c3b7e4b580
[1]: https://valkyrie.yoctoproject.org/#/builders/87/builds/17/steps/40/logs/stdio

(From OE-Core rev: e89bbc00ba16574d719b199c01ffbf37646f4f54)

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/lib/oeqa/selftest/cases/reproducible.py b/meta/lib/oeqa/selftest/cases/reproducible.py
index a68f72ff23..415a1ef577 100644
--- a/meta/lib/oeqa/selftest/cases/reproducible.py
+++ b/meta/lib/oeqa/selftest/cases/reproducible.py
@@ -239,6 +239,10 @@ class ReproducibleTests(OESelftestTestCase):
         capture_vars.append("BB_CONSOLELOG")
         config += 'BB_CONSOLELOG = "${LOG_DIR}/cooker/${MACHINE}/console.log"\n'
 
+        # We want different log files for each build, but a persistent bitbake
+        # may reuse the previous log file so restart the bitbake server.
+        bitbake("--kill-server")
+
         bitbake_failure_count = 0
         if not use_sstate:
             if self.sstate_targets: