bitbake: Overhaul environment handling

Currently, anything whitelisted in the environment makes it into the worker
processes. This is undesireable and the worker environment should be as
clean as possible. This patch adapts bitbake sosme variables are loaded into
bitbake's datastore but not exported by default. Any variable can be exported
by setting its export flag.

Currently, this code only finalises the environment in he worker as doing so
in the server means variables are unavailable in the worker. If we switch
back to fork() calls instead of exec() this code will need revisting.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 8c55e3e643..95f38f6236 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -918,7 +918,8 @@ class BBCooker:
     def pre_serve(self):
         # Empty the environment. The environment will be populated as
         # necessary from the data store.
-        bb.utils.empty_environment()
+        #bb.utils.empty_environment()
+        return
 
     def post_serve(self):
         bb.event.fire(CookerExit(), self.configuration.event_data)