From 696d4f01d235b7309fd1b88bd12949927f19b5d6 Mon Sep 17 00:00:00 2001
From: Robert Bradford <rob@openedhand.com>
Date: Fri, 17 Oct 2008 09:46:35 +0000
Subject: bitbake: Refactor the environment variable handling

Refactor the environment variable handling so that it more closes matches the
changes that have been made in bitbake-dev.

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@5527 311d38ba-8fff-0310-9ca6-ca027cbcb966
---
 bitbake/lib/bb/cooker.py |  3 +++
 bitbake/lib/bb/data.py   |  2 --
 bitbake/lib/bb/utils.py  | 22 ++++++++++++++++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)

(limited to 'bitbake/lib')

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 50624d8d33..7477ee6c6f 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -596,6 +596,9 @@ class BBCooker:
         build.
         """
 
+        # Wipe the OS environment
+        bb.utils.empty_environment()
+
         if self.configuration.show_environment:
             self.showEnvironment(self.configuration.buildfile, self.configuration.pkgs_to_build)
             sys.exit( 0 )
diff --git a/bitbake/lib/bb/data.py b/bitbake/lib/bb/data.py
index 82eef44989..19e67dbc37 100644
--- a/bitbake/lib/bb/data.py
+++ b/bitbake/lib/bb/data.py
@@ -331,8 +331,6 @@ def inheritFromOS(d):
             setVar(s, os.environ[s], d)
         except TypeError:
             pass
-        os.unsetenv(s)
-        del os.environ[s]
 
 def emit_var(var, o=sys.__stdout__, d = init(), all=False):
     """Emit a variable to be sourced by a shell."""
diff --git a/bitbake/lib/bb/utils.py b/bitbake/lib/bb/utils.py
index 18fc9f7252..0f402f6279 100644
--- a/bitbake/lib/bb/utils.py
+++ b/bitbake/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 variables 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!
-- 
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