extensible sdk: Error when trying to install as root.

Since the extensible sdk uses bitbake, which can't run as root, the sdk
shouldn't be installed as root.

Previously it would error out late into setup when bitbake errored
saying not to run bitbake as root.

Now the script errors with a message saying the extensible sdk can't be
installed as root.

[Yocto #7545]

(From OE-Core rev: 309e8f4e536148056223f50637ed291c48d148ca)

Signed-off-by: Randy Witt <randy.e.witt@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/populate_sdk_base.bbclass

@@ -51,6 +51,7 @@ PID = "${@os.getpid()}"
 EXCLUDE_FROM_WORLD = "1"
 
 SDK_PACKAGING_FUNC ?= "create_shar"
+SDK_PRE_INSTALL_COMMAND ?= ""
 SDK_POST_INSTALL_COMMAND ?= ""
 SDK_RELOCATE_AFTER_INSTALL ?= "1"
 
@@ -134,15 +135,21 @@ fakeroot create_shar() {
 	# copy in the template shar extractor script
 	cp ${COREBASE}/meta/files/toolchain-shar-extract.sh ${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
 
-	rm -f ${T}/post_install_command
+	rm -f ${T}/pre_install_command ${T}/post_install_command
 
 	if [ ${SDK_RELOCATE_AFTER_INSTALL} -eq 1 ] ; then
 		cp ${COREBASE}/meta/files/toolchain-shar-relocate.sh ${T}/post_install_command
 	fi
+	cat << "EOF" >> ${T}/pre_install_command
+${SDK_PRE_INSTALL_COMMAND}
+EOF
+
 	cat << "EOF" >> ${T}/post_install_command
 ${SDK_POST_INSTALL_COMMAND}
 EOF
-	sed -i -e '/@SDK_POST_INSTALL_COMMAND@/r ${T}/post_install_command' ${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
+	sed -i -e '/@SDK_PRE_INSTALL_COMMAND@/r ${T}/pre_install_command' \
+		-e '/@SDK_POST_INSTALL_COMMAND@/r ${T}/post_install_command' \
+		${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
 
 	# substitute variables
 	sed -i -e 's#@SDK_ARCH@#${SDK_ARCH}#g' \
@@ -151,6 +158,7 @@ EOF
 		-e 's#@REAL_MULTIMACH_TARGET_SYS@#${REAL_MULTIMACH_TARGET_SYS}#g' \
 		-e 's#@SDK_TITLE@#${SDK_TITLE}#g' \
 		-e 's#@SDK_VERSION@#${SDK_VERSION}#g' \
+		-e '/@SDK_PRE_INSTALL_COMMAND@/d' \
 		-e '/@SDK_POST_INSTALL_COMMAND@/d' \
 		${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
 

meta/classes/populate_sdk_ext.bbclass

@@ -173,6 +173,17 @@ install_tools() {
 	install ${SDK_DEPLOY}/${BUILD_ARCH}-nativesdk-libc.tar.bz2 ${SDK_OUTPUT}/${SDKPATH}
 }
 
+# Since bitbake won't run as root it doesn't make sense to try and install
+# the extensible sdk as root.
+sdk_ext_preinst() {
+	if [ "`id -u`" = "0" ]; then
+		echo "ERROR: The extensible sdk cannot be installed as root."
+		exit 1
+	fi
+	SDK_EXTENSIBLE="1"
+}
+SDK_PRE_INSTALL_COMMAND_task-populate-sdk-ext = "${sdk_ext_preinst}"
+
 # FIXME this preparation should be done as part of the SDK construction
 sdk_ext_postinst() {
 	printf "\nExtracting buildtools...\n"

meta/files/toolchain-shar-extract.sh

@@ -71,6 +71,8 @@ if [ $verbose = 1 ] ; then
 	set -x
 fi
 
+@SDK_PRE_INSTALL_COMMAND@
+
 if [ "$target_sdk_dir" = "" ]; then
 	read -e -p "Enter target directory for SDK (default: $DEFAULT_INSTALL_DIR): " target_sdk_dir
 	[ "$target_sdk_dir" = "" ] && target_sdk_dir=$DEFAULT_INSTALL_DIR
@@ -116,6 +118,11 @@ mkdir -p $target_sdk_dir >/dev/null 2>&1
 
 # if don't have the right to access dir, gain by sudo 
 if [ ! -x $target_sdk_dir -o ! -w $target_sdk_dir -o ! -r $target_sdk_dir ]; then 
+	if [ "$SDK_EXTENSIBLE" = "1" ]; then
+		echo "Unable to access \"$target_sdk_dir\"."
+		exit 1
+	fi
+
 	SUDO_EXEC=$(which "sudo")
 	if [ -z $SUDO_EXEC ]; then
 		echo "No command 'sudo' found, please install sudo first. Abort!"