recipeparse: fix bitbake-cookerdaemon.log being written out to meta/

Our setup when parsing recipes is a little unusual in that we have no
bblayers.conf, thus findTopdir() which is used to find where to put
bitbake.lock (and bitbake-cookerdaemon.log as of the recent bitbake
commit 1620dbc48ffb2a882371cf9174a7b12648befc8a) defaults to the
parent's parent of where bitbake.conf can be found, which is the meta/
subdirectory of the OE-Core repo, thus that's where we now find
bitbake-cookerdaemon.log gets written out. We really don't want to be
writing anything into the metadata repositories so create a fake
conf/bblayers.conf in our temp directory to make findTipdir() pick that
instead.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

TODO

@@ -1,8 +1,6 @@
 TODO:
 
 Bugs
-* Directory where bitbake-cookerdaemon.log is placed isn't right (meta dir)
-* bitbake-cookerdaemon.log should be cleared out every time
 * Duplication of first maintainer when editing to add a second?
 * Remote patches in SRC_URI trigger errors
 * We're wasting time gathering layer info at the start for layers that have not changed

layerindex/recipeparse.py

@@ -70,6 +70,11 @@ def init_parser(settings, branch, bitbakepath, enable_tracking=False, nocheckout
     tempdir = tempfile.mkdtemp(dir=settings.TEMP_BASE_DIR)
     saved_cwd = os.getcwd()
     os.chdir(tempdir)
+    # We need to create a dummy bblayers.conf to avoid bitbake-cookerdaemon.log being created in <oecore>/meta/
+    # (see findTopdir() in bitbake/lib/bb/cookerdata.py)
+    os.mkdir(os.path.join(tempdir, 'conf'))
+    with open(os.path.join(tempdir, 'conf', 'bblayers.conf'), 'w') as f:
+        pass
 
     if logger:
         tinfoil = utils.setup_tinfoil(bitbakepath, enable_tracking, loglevel=logger.getEffectiveLevel())