[#47/%20869] build: (minor) frr keeps changing after build

src/sonic-frr/Makefile

@@ -13,29 +13,27 @@ export DEBEMAIL := [email protected]
 $(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
 	# Build the package
 	pushd ./frr
-	git checkout -b $(FRR_BRANCH) origin/$(FRR_BRANCH) || git checkout $(FRR_BRANCH)
-ifeq ($(CROSS_BUILD_ENVIRON), y)
-	git reset --hard
-endif
-	stg branch --create $(STG_BRANCH) $(FRR_TAG)
+	git fetch --all
+
+	oldbranch=$$(git describe --always)
+	if ! git checkout $(FRR_BRANCH)-sonic; then
+		git checkout -b $(FRR_BRANCH)-sonic origin/$(FRR_BRANCH)
+	fi
+	git clean -xdf
+	git reset --hard origin/$(FRR_BRANCH)
+	git branch --list 'stg_temp.*' | sed -e '/^[*] /d' | xargs --no-run-if-empty git branch -D
+
+	stg branch --create $(STG_BRANCH)-sonic $(FRR_TAG)
 	stg import -s ../patch/series
+
 	gbp dch --ignore-branch --new-version=$(FRR_VERSION)-sonic-$(FRR_SUBVERSION) --dch-opt="--force-bad-version" --commit --git-author
 
 ifeq ($(CROSS_BUILD_ENVIRON), y)
 	CFLAGS="-I $$CROSS_PERL_CORE_PATH" dpkg-buildpackage -rfakeroot -b -d -us -uc -Ppkg.frr.nortrlib -a$(CONFIGURED_ARCH) -Pcross,nocheck -j$(SONIC_CONFIG_MAKE_JOBS) --admindir $(SONIC_DPKG_ADMINDIR)
 else
 	dpkg-buildpackage -rfakeroot -b -us -uc -Ppkg.frr.nortrlib -j$(SONIC_CONFIG_MAKE_JOBS) --admindir $(SONIC_DPKG_ADMINDIR)
 endif
-	stg undo || true
-	git clean -xfdf
-	git checkout $(FRR_BRANCH)
-	stg branch --delete --force $(STG_BRANCH)
-	git rev-parse --short HEAD | xargs git checkout
-ifeq ($(CROSS_BUILD_ENVIRON), y)
-	git reset --hard
-endif
-	git checkout master
-	git branch -D $(FRR_BRANCH)
+	git checkout "$$oldbranch"
 	popd
 	mv $(DERIVED_TARGET) $* $(DEST)/