added build script #9

	name: Publish to npm (Only if version changes)

	on:
	push:
	branches:
	- main

	jobs:
	check-and-publish:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	with:
	fetch-depth: 2 # Fetch the last commit for comparison

	- name: Set up Node.js
	uses: actions/setup-node@v3
	with:
	node-version: 18
	registry-url: "https://registry.npmjs.org/"

	- name: Get previous package.json version
	id: prev_version
	run: \|
	PREV_VERSION=$(git show HEAD~1:package.json \| jq -r '.version')
	echo "Previous version: $PREV_VERSION"
	echo "PREV_VERSION=$PREV_VERSION" >> $GITHUB_ENV

	- name: Get current package.json version
	id: current_version
	run: \|
	CUR_VERSION=$(jq -r '.version' package.json)
	echo "Current version: $CUR_VERSION"
	echo "CUR_VERSION=$CUR_VERSION" >> $GITHUB_ENV

	- name: Check if version changed
	id: version_check
	run: \|
	if [ "$PREV_VERSION" != "$CUR_VERSION" ]; then
	echo "Version changed, proceeding with publish."
	echo "PUBLISH=true" >> $GITHUB_ENV
	else
	echo "Version did not change, skipping publish."
	echo "PUBLISH=false" >> $GITHUB_ENV
	fi

	- name: Install dependencies
	if: env.PUBLISH == 'true'
	run: npm install

	- name: Build package (if necessary)
	if: env.PUBLISH == 'true'
	run: npm run build \|\| echo "No build step"

	- name: Publish to npm
	if: env.PUBLISH == 'true'
	run: npm publish --access public
	env:
	NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

	- name: Skip publishing
	if: env.PUBLISH == 'false'
	run: echo "No version change detected. Skipping npm publish."

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