bitbake|cooker: save a copy of the environment when BitBake is started

Create a data store in the cooker containing the values of the environment
from when BitBake is launched such that child processes can replicate
(and/or use values from) the host environment, rather than the cleaned up
environment that the main BitBake process uses.

(Bitbake rev: 54c7206165c0e7cfe5f7b243c80461baf5e7dfb1)

Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake

@@ -197,6 +197,9 @@ Default BBFILES are the .bb files in the current directory.""")
     handler = bb.event.LogHandler()
     logger.addHandler(handler)
 
+    # Before we start modifying the environment we should take a pristine
+    # copy for possible later use
+    initialenv = os.environ.copy()
     # Clear away any spurious environment variables. But don't wipe the
     # environment totally. This is necessary to ensure the correct operation
     # of the UIs (e.g. for DISPLAY, etc.)
@@ -207,7 +210,7 @@ Default BBFILES are the .bb files in the current directory.""")
     server.initServer()
     idle = server.getServerIdleCB()
 
-    cooker = bb.cooker.BBCooker(configuration, idle)
+    cooker = bb.cooker.BBCooker(configuration, idle, initialenv)
     cooker.parseCommandLine()
 
     server.addcooker(cooker)