Extend Makefile to support updating repositories with subsequent bare make invocations.

1 files changed, 12 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index 9775eb1..b2072eb 100644
--- a/Makefile
+++ b/Makefile
@@ -19,10 +19,16 @@ all: $(underlays) $(dummies)
 $(underlays): locale=$(if $(filter l10n/,$(lastword $(subst _, ,$(dir $@)))),$(notdir $@))
 $(underlays): underlay=$(@:%_l10n/$(locale)=%)
 $(underlays):
-	mkdir -p $@
-	cd $@ && git init
-	cd $@ && git remote add -f -t $(master) -m $(master) origin $(origin)
-	cd $@ && git merge origin
+	@mkdir -p $@
+	@if [ -d "$@/.git" ]; then \
+		cd $@ && \
+		git pull; \
+	else \
+		cd $@ && \
+		git init && \
+		git remote add -f -t $(master) -m $(master) origin $(origin) && \
+		git merge origin; \
+	fi
 
 $(dummies):
 	mkdir -p $@
@@ -32,3 +38,5 @@ ultraclean:
 	rm -rf $(underlays)
 	rm -rf $(dir $(underlays_l10n))
 	rm -rf $(dummies)
+
+.PHONY: $(underlays)