data_smart.py: Uses BB_HASHCONFIG_WHITELIST to filter unnecessary variables

Adopt the BB_HASHCONFIG_WHITELIST as a exclusion list for variables that are
not needed in cache hash calculation.

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
CC: Christopher Larson <kergoth@gmail.com>
CC: Martin Jansa <martin.jansa@gmail.com>
CC: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 12 deletions

diff --git a/lib/bb/data_smart.py b/lib/bb/data_smart.py
index 24c7a8fd6..7765f81b5 100644
--- a/lib/bb/data_smart.py
+++ b/lib/bb/data_smart.py
@@ -463,20 +463,12 @@ class DataSmart(MutableMapping):
 
     def get_hash(self):
         data = ""
-        keys = iter(self)
+        config_whitelist = set((self.getVar("BB_HASHCONFIG_WHITELIST", True) or "").split())
+        keys = set(key for key in iter(self) if not key.startswith("__"))
         for key in keys:
-            if key in ["TIME", "DATE"]:
+            if key in config_whitelist:
                 continue
-            if key == "__depends":
-                deps = list(self.getVar(key, False))
-                deps.sort()
-                value = [deps[i][0] for i in range(len(deps))]
-            elif key == "PATH":
-                path = list(set(self.getVar(key, False).split(':')))
-                path.sort()
-                value = " ".join(path)
-            else:
-                value = self.getVar(key, False) or ""
+            value = self.getVar(key, False) or ""
             data = data + key + ': ' + str(value) + '\n'
 
         return hashlib.md5(data).hexdigest()