Replace scripts with makefile

.env

@@ -0,0 +1,4 @@
+CHANGELOG_START_TAG=ical4j-3.1.1
+CHANGELOG_END_TAG=HEAD
+
+GRADLE_VERSION=6.9.1

Makefile

@@ -0,0 +1,40 @@
+SHELL:=/bin/bash
+include .env
+
+.PHONY: all gradlew clean build zoneinfo changelog currentVersion markNextVersion release publish
+
+all: test
+
+gradlew:
+	./gradlew wrapper --gradle-version=$(GRADLE_VERSION) --distribution-type=bin
+
+clean:
+	./gradlew clean
+
+test:
+	./gradlew test
+
+build:
+	./gradlew build
+
+zoneinfo:
+	docker pull benfortuna/tzurl && \
+        docker run -v $(pwd)/src/main/resources/zoneinfo:/zoneinfo -it benfortuna/tzurl rsync -av --delete /usr/local/apache2/htdocs/zoneinfo / && \
+        docker run -v $(pwd)/src/main/resources/zoneinfo-global:/zoneinfo-global -it benfortuna/tzurl rsync -av --delete /usr/local/apache2/htdocs/zoneinfo-global /
+
+changelog:
+	git log "$(CHANGELOG_START_TAG)...$(CHANGELOG_END_TAG)" \
+    	--pretty=format:'* %s [View commit](http://github.com/ical4j/ical4j/commit/%H)' --reverse | grep -v Merge
+
+currentVersion:
+	./gradlew -q currentVersion
+
+markNextVersion:
+	NEXT_VERSION=$(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
+	./gradlew markNextVersion -Prelease.version=$(NEXT_VERSION)
+
+release:
+	./gradlew release
+
+publish:
+	./gradlew publish