1 files changed, 17 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index b84c8e9dfaad..1f2e848d9e69 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,21 @@
-.PHONY: pre post clean
+.PHONY: post clean upgrade versions
 
-pre:
-	makepkg -g
+LATEST_VER := $(shell curl -s https://github.com/japgolly/tla2json/releases/latest | perl -pe 's!.*/tag/v(.+?)".*!$$1!')
+
+versions:
+	@echo "Current version:"
+	@grep '^pkgver' PKGBUILD | sed 's/.*=/  /'
+	@echo "Latest version:"
+	@echo "  $(LATEST_VER)"
+
+upgrade:
+	rm -f tla2json.jar
+	perl -pi -e 's/^pkgver=.+/pkgver=$(LATEST_VER)/' PKGBUILD
+	bash -c 'sed -i -e "/^sha256sums.*/,+1c $$(makepkg -g | perl -0777 -pe "chop; s/\n/\\\n/g")" PKGBUILD'
+	make post
+	git add .SRCINFO PKGBUILD
+	git commit -m "Upgrade to $(LATEST_VER)" .SRCINFO PKGBUILD
+	git show
 
 post:
 	makepkg --verifysource -f