[OE-core] [PATCH] oe-buildenv-internal: Preserve/Unset and Restore TERM

[Saul Wold]

Having a value in TERM that is not recognized by the nativesdk can cause
potential escape sequences appearing in the output stream, the can be seen
on Ubuntu with TERM=xterm-256color. Unsetting TERM allows for consistent
results in the python output.

Also, don't exit, use return, otherwise the shell exits and get no error information.

[YOCTO #4732]

Signed-off-by: Saul Wold <sgw at linux.intel.com>
---
 scripts/oe-buildenv-internal | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/oe-buildenv-internal b/scripts/oe-buildenv-internal
index 40d95b7..9be034b 100755
--- a/scripts/oe-buildenv-internal
+++ b/scripts/oe-buildenv-internal
@@ -29,6 +29,8 @@ if [ ! -z "$OECORE_SDK_VERSION" ]; then
     return 1
 fi
 
+TERM_save=$TERM
+unset TERM
 # Make sure we're not using python v3.x. This check can't go into
 # sanity.bbclass because bitbake's source code doesn't even pass
 # parsing stage when used with python v3, so we catch it here so we
@@ -37,7 +39,7 @@ py_v3_check=`/usr/bin/env python --version 2>&1 | grep "Python 3"`
 if [ "$py_v3_check" != "" ]; then
 	echo "Bitbake is not compatible with python v3"
 	echo "Please set up python v2 as your default python interpreter"
-	exit 1
+	return 1
 fi
 
 # Similarly, we now have code that doesn't parse correctly with older
@@ -46,7 +48,7 @@ fi
 py_v26_check=`python -c 'import sys; print sys.version_info >= (2,7,3)'`
 if [ "$py_v26_check" != "True" ]; then
 	echo "BitBake requires Python 2.7.3 or later"
-	exit 1
+	return 1
 fi
 
 if [ "x$BDIR" = "x" ]; then
@@ -107,3 +109,5 @@ HTTPS_PROXY https_proxy FTP_PROXY ftp_proxy FTPS_PROXY ftps_proxy ALL_PROXY \
 all_proxy NO_PROXY no_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY \
 SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND \
 SOCKS5_PASSWD SOCKS5_USER SCREENDIR STAMPS_DIR"
+
+export TERM=$TERM_save
-- 
1.8.1.4