[PATCH master] scripts: setlocalversion: sync with Linux

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

We are using an older version of setlocalversion that sources the
config. This is wrong as there's no guarantee that it's ok to source the
config, e.g.:

  CONFIG_DEFAULT_ENVIRONMENT_PATH="$(objtree)/.ptxdist-defaultenv"

when sourced will lead to:

  scripts/setlocalversion: 15: include/config/auto.conf: objtree: not found

Fix this by grepping the file instead.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 scripts/setlocalversion | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 6b54e46a0f12..cbd3883df9ae 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -111,13 +111,14 @@ if $scm_only; then
 	exit
 fi
 
-if test -e include/config/auto.conf; then
-	. include/config/auto.conf
-else
+if ! test -e include/config/auto.conf; then
 	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
 	exit 1
 fi
 
+# version string from CONFIG_LOCALVERSION
+config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
+
 # localversion* files in the build and source directory
 res="$(collect_files localversion*)"
 if test ! "$srctree" -ef .; then
@@ -125,10 +126,10 @@ if test ! "$srctree" -ef .; then
 fi
 
 # CONFIG_LOCALVERSION and LOCALVERSION (if set)
-res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}"
+res="${res}${config_localversion}${LOCALVERSION}"
 
 # scm version string if not at a tagged commit
-if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
+if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
 	# full scm version string
 	res="$res$(scm_version)"
 elif [ "${LOCALVERSION+set}" != "set" ]; then
-- 
2.39.2