oe-init-build-env-memres: Fix source check

The source check was referring to oe-init-build-env instead of the
memres. It could be executed without the proper failure message and the
corresponding exit command out of the script. This commit makes the
memres script look more like the oe-init-build-env with the correct
script name.

[YOCTO #7487]

(From OE-Core rev: 1666b41e73f2aa7bd736c3e9bf3797946bff61b5)

Signed-off-by: Benjamin Esquivel <benjamin.esquivel@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

oe-init-build-env-memres

@@ -32,28 +32,33 @@ else
     port=$1
     shift
 fi
-if [ -z "$ZSH_NAME" ] && [ "x$0" = "x./oe-init-build-env" ]; then
-   echo "Error: This script needs to be sourced. Please run as '. ./oe-init-build-env'"
+
+if [ -n "$BASH_SOURCE" ]; then
+  OEROOT="`dirname $BASH_SOURCE`"
+elif [ -n "$ZSH_NAME" ]; then
+  OEROOT="`dirname $0`"
 else
-   if [ -n "$BASH_SOURCE" ]; then
-      OEROOT="`dirname $BASH_SOURCE`"
-   elif [ -n "$ZSH_NAME" ]; then
-      OEROOT="`dirname $0`"
-   else
-      OEROOT="`pwd`"
-   fi
-   if [ -n "$BBSERVER" ]; then
-      unset BBSERVER
-   fi
-            
-   OEROOT=`readlink -f "$OEROOT"`
-   export OEROOT
-   . $OEROOT/scripts/oe-buildenv-internal && \
-        $OEROOT/scripts/oe-setup-builddir && \
-        [ -n "$BUILDDIR" ] && cd $BUILDDIR
-   unset OEROOT
-   unset BBPATH
+  OEROOT="`pwd`"
 fi
+if [ -n "$BBSERVER" ]; then
+  unset BBSERVER
+fi
+
+THIS_SCRIPT=$OEROOT/oe-init-build-env-memres
+if [ -z "$ZSH_NAME" ] && [ "x$0" = "x$THIS_SCRIPT" ]; then
+   echo "Error: This script needs to be sourced. Please run as '. $THIS_SCRIPT'"
+   exit 1
+fi
+
+OEROOT=`readlink -f "$OEROOT"`
+export OEROOT
+. $OEROOT/scripts/oe-buildenv-internal && \
+    $OEROOT/scripts/oe-setup-builddir && \
+    [ -n "$BUILDDIR" ] && cd $BUILDDIR
+unset OEROOT
+unset BBPATH
+unset THIS_SCRIPT
+
 res=1
 if [ -e bitbake.lock ] && grep : bitbake.lock > /dev/null ; then
     BBSERVER=`cat bitbake.lock` bitbake --status-only