[bitbake-devel][PATCH v2 6/8] bitbake: cache: Cache size optimization

["Joshua Watt" <JPEWhacker@gmail.com>]

Now that there is a cache object per multiconfig, it is not necessary
for each cache object to parse all other multiconfigs. Only the base
configuration and the specific multiconfig that the cache is tracking is
required. This significantly reduces the number of files parsed and the
size of each cache when there are multiple multiconfigs enabled.

This still doesn't get quite to the ideal case, since each multiconfig
cache still has a independent copy of the base cache, but removing this
is more difficult and invasive.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
---
 bitbake/lib/bb/cache.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/bitbake/lib/bb/cache.py b/bitbake/lib/bb/cache.py
index b34bfa9b5a..3683ac6246 100644
--- a/bitbake/lib/bb/cache.py
+++ b/bitbake/lib/bb/cache.py
@@ -328,7 +328,7 @@ class NoCache(object):
         bb_data = self.load_bbfile(virtualfn, appends, virtonly=True)
         return bb_data[virtual]
 
-    def load_bbfile(self, bbfile, appends, virtonly = False):
+    def load_bbfile(self, bbfile, appends, virtonly = False, mclist = None):
         """
         Load and parse one .bb build file
         Return the data and whether parsing resulted in the file being skipped
@@ -344,7 +344,10 @@ class NoCache(object):
         bb_data = self.data.createCopy()
         datastores = parse_recipe(bb_data, bbfile, appends)
 
-        for mc in self.databuilder.mcdata:
+        if mclist is None:
+            mclist = self.databuilder.mcdata.keys()
+
+        for mc in mclist:
             if not mc:
                 continue
             bb_data = self.databuilder.mcdata[mc].createCopy()
@@ -500,7 +503,7 @@ class Cache(NoCache):
         """Parse the specified filename, returning the recipe information"""
         self.logger.debug(1, "Parsing %s", filename)
         infos = []
-        datastores = self.load_bbfile(filename, appends)
+        datastores = self.load_bbfile(filename, appends, mclist=(self.mc,))
         depends = []
         variants = []
         # Process the "real" fn last so we can store variants list
-- 
2.26.2