bitbake-dev: Refactor the environment variable handling.

Do not clear the environment when saving the environment to the data store.
Instead clear this once the cooker has forked. This ensures that the UI
operates in a filtered (but not empty) environment.

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@5526 311d38ba-8fff-0310-9ca6-ca027cbcb966

1 files changed, 22 insertions, 0 deletions

diff --git a/bitbake-dev/lib/bb/utils.py b/bitbake-dev/lib/bb/utils.py
index 119f08582d..94bc62f7cf 100644
--- a/bitbake-dev/lib/bb/utils.py
+++ b/bitbake-dev/lib/bb/utils.py
@@ -354,6 +354,28 @@ def filter_environment(good_vars):
 
     return removed_vars
 
+def clean_environment():
+    """
+    Clean up any spurious environment variables. This will remove any
+    variables the user hasn't chose to preserve.
+    """
+    if 'BB_PRESERVE_ENV' not in os.environ:
+        if 'BB_ENV_WHITELIST' in os.environ:
+            good_vars = os.environ['BB_ENV_WHITELIST'].split()
+        else:
+            good_vars = preserved_envvars_list()
+        if 'BB_ENV_EXTRAWHITE' in os.environ:
+            good_vars.extend(os.environ['BB_ENV_EXTRAWHITE'].split())
+        filter_environment(good_vars)
+
+def empty_environment():
+    """
+    Remove all variable from the environment.
+    """
+    for s in os.environ.keys():
+        os.unsetenv(s)
+        del os.environ[s]
+
 def prunedir(topdir):
     # Delete everything reachable from the directory named in 'topdir'.
     # CAUTION:  This is dangerous!