Merge pull request #19 from ykiu/bug #17

	# Publishes a new version to npm and GitHub releases.
	# Only runs when `version` in package.json has changed in the main branch.

	name: Publish

	on:
	push:
	branches:
	- 'main'

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/[email protected]
	with:
	fetch-depth: 0
	- uses: actions/[email protected]
	with:
	node-version: 18
	# 'registry-url' is required for 'npm publish'
	registry-url: 'https://registry.npmjs.org'
	- id: versions
	run: \|
	git show HEAD:package.json \| node -e "console.log('current_version=' + JSON.parse(require('fs').readFileSync(0)).version)" >> $GITHUB_OUTPUT
	git show HEAD^1:package.json \| node -e "console.log('prev_version=' + JSON.parse(require('fs').readFileSync(0)).version)" >> $GITHUB_OUTPUT
	- if: steps.versions.outputs.prev_version != steps.versions.outputs.current_version
	run: \|
	echo "${{ steps.versions.outputs.prev_version }} --> ${{ steps.versions.outputs.current_version }}"
	npm ci
	npm run build
	npm pack
	- if: steps.versions.outputs.prev_version != steps.versions.outputs.current_version
	run: \|
	npm publish
	env:
	NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
	- if: steps.versions.outputs.prev_version != steps.versions.outputs.current_version
	run: \|
	git tag v${{ steps.versions.outputs.current_version }} && git push origin v${{ steps.versions.outputs.current_version }}
	- if: steps.versions.outputs.prev_version != steps.versions.outputs.current_version
	uses: ncipollo/[email protected]
	with:
	artifacts: '*.tgz'
	token: ${{ secrets.GITHUB_TOKEN }}
	tag: v${{ steps.versions.outputs.current_version }}

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