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)

bitbake/lib/bb/cooker.py

@@ -78,7 +78,7 @@ class BBCooker:
     Manages one bitbake build run
     """
 
-    def __init__(self, configuration, server_registration_cb):
+    def __init__(self, configuration, server_registration_cb, savedenv={}):
         self.status = None
         self.appendlist = {}
         self.skiplist = {}
@@ -87,6 +87,14 @@ class BBCooker:
 
         self.configuration = configuration
 
+        # Keep a datastore of the initial environment variables and their
+        # values from when BitBake was launched to enable child processes
+        # to use environment variables which have been cleaned from the
+        # BitBake processes env
+        self.savedenv = bb.data.init()
+        for k in savedenv:
+            self.savedenv.setVar(k, savedenv[k])
+
         self.caches_array = []
         # Currently, only Image Creator hob ui needs extra cache.
         # So, we save Extra Cache class name and container file