[CONNECT-2858] Update build script to fail with a clear error if a tag exists already #53

	name: "Build and Test"

	on:
	pull_request:
	branches:
	- main
	push:
	branches:
	- main

	jobs:
	build:
	name: "Build"
	runs-on:
	- ubuntu-latest
	env:
	GRADLE_OPTS: "-Djava.security.egd=file:/dev/./urandom -Dorg.gradle.parallel=true"
	container:
	image: azul/zulu-openjdk:11
	steps:
	- name: "Install packages"
	run: apt-get update && apt-get install -y git
	- name: Checkout repository
	uses: actions/checkout@v4
	with:
	fetch-tags: true
	- name: "Validate version tag doesn't exist"
	run: \|
	VERSION=$(grep '^version=' gradle.properties \| cut -d'=' -f2)
	TAG="v${VERSION}"
	REPO_URL="https://github.com/${{ github.repository }}"
	if git ls-remote --tags "${REPO_URL}" \| grep -q "refs/tags/${TAG}$"; then
	echo "============================================="
	echo "ERROR: Tag ${TAG} already exists!"
	echo ""
	echo "Please bump the version in gradle.properties"
	echo "============================================="
	exit 1
	fi
	echo "✓ Version ${VERSION} is valid (tag ${TAG} does not exist yet)"
	- name: "Gradle cache"
	uses: actions/cache@v4
	with:
	path: \|
	~/.gradle
	key: gradle-v1-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties', '*/.gradle*') }}
	- name: "Assemble jar"
	run: GRADLE_USER_HOME=$HOME/.gradle ./gradlew assemble --console=plain --no-daemon
	- name: "Test if publishing works"
	run: GRADLE_USER_HOME=$HOME/.gradle ./gradlew publishToMavenLocal --console=plain --no-daemon --stacktrace
	- name: "Tag release"
	if: github.ref == 'refs/heads/main'
	run: GRADLE_USER_HOME=$HOME/.gradle ./gradlew tagRelease --console=plain --no-daemon

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