[OE-core] [PATCH 2/2] oe-buildenv-internal: preserve existing BB_ENV_EXTRAWHITE

[Juro Bystricky]

According to the BitBake User Manual the environment variable BB_ENV_EXTRAWHITE
specifies an additional set of variables to allow through (whitelist) from the
external environment into BitBake's datastore. However, running:

  $ source oe-init-build-env build-name

will overwrite any pre-existing BB_ENV_EXTRAWHITE variables.
This patch modifies this behaviour: all oe-build-internal BB_ENV_EXTRAWHITE
variables are appended to any potentially already existing BB_ENV_EXTRAWHITE
variables. (The variables are only appended if not already in BB_ENV_EXTRAWHITE)

Signed-off-by: Juro Bystricky <juro.bystricky at intel.com>
---
 scripts/oe-buildenv-internal | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/oe-buildenv-internal b/scripts/oe-buildenv-internal
index 9ed2721..51e449a 100755
--- a/scripts/oe-buildenv-internal
+++ b/scripts/oe-buildenv-internal
@@ -102,8 +102,12 @@ unset BITBAKEDIR NEWPATHS
 # Used by the runqemu script
 export BUILDDIR
 export PATH
-export BB_ENV_EXTRAWHITE="MACHINE DISTRO TCMODE TCLIBC HTTP_PROXY http_proxy \
+
+BB_ENV_EXTRAWHITE_OE="MACHINE DISTRO TCMODE TCLIBC HTTP_PROXY http_proxy \
 HTTPS_PROXY https_proxy FTP_PROXY ftp_proxy FTPS_PROXY ftps_proxy ALL_PROXY \
 all_proxy NO_PROXY no_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY \
 SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND \
 SOCKS5_PASSWD SOCKS5_USER SCREENDIR STAMPS_DIR"
+
+echo "$BB_ENV_EXTRAWHITE" | grep -q "${BB_ENV_EXTRAWHITE_OE}"
+[ $? != 0 ] && export BB_ENV_EXTRAWHITE="${BB_ENV_EXTRAWHITE_OE} $BB_ENV_EXTRAWHITE"
-- 
1.9.1