[OE-core][PATCH v3 4/8] bitbake: lib: Add PrefixLoggerAdapter helper

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

Adds a helper logger adapter to add a prefix to all log messages. This
is useful to distinguish log messages between multiple instances of a
object.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
---
 bitbake/lib/bb/__init__.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/bitbake/lib/bb/__init__.py b/bitbake/lib/bb/__init__.py
index 2e2966c3b9..1de32041ed 100644
--- a/bitbake/lib/bb/__init__.py
+++ b/bitbake/lib/bb/__init__.py
@@ -84,6 +84,14 @@ logger.setLevel(logging.DEBUG - 2)
 
 mainlogger = logging.getLogger("BitBake.Main")
 
+class PrefixLoggerAdapter(logging.LoggerAdapter):
+    def __init__(self, prefix, logger):
+        super().__init__(logger, {})
+        self.__msg_prefix = prefix
+
+    def process(self, msg, kwargs):
+        return "%s%s" %(self.__msg_prefix, msg), kwargs
+
 # This has to be imported after the setLoggerClass, as the import of bb.msg
 # can result in construction of the various loggers.
 import bb.msg
-- 
2.26.2