Merge pull request #173 from embulk/embulk/bump-up-0-7-4 #7

	name: Publish
	on:
	push:
	tags:
	- "v0.*"
	jobs:
	publish:
	runs-on: ubuntu-latest
	environment: maven-central-and-ruby-gems
	strategy:
	fail-fast: true
	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.3.0
	# get tag variable using {{ github.ref_name }}
	#
	# References:
	# * https://docs.github.com/en/actions/learn-github-actions/contexts#github-context
	# * https://docs.github.com/en/actions/learn-github-actions/variables#default-environment-variables
	- name: extract gem version from tag
	id: vars
	run: echo version=${{ github.ref_name }} \| sed -e 's/v0/0/' >> $GITHUB_OUTPUT
	#
	# From gem push documents.
	#
	# The push command will use ~/.gem/credentials to authenticate to a server,
	# but you can use the RubyGems environment variable GEM_HOST_API_KEY
	# to set the api key to authenticate.
	#
	# https://guides.rubygems.org/command-reference/#gem-push
	#
	- name: Publish
	run: \|
	rake build
	gem push pkg/${EMBULK_PLUGIN_NAME}-${{ steps.vars.outputs.version }}.gem
	env:
	EMBULK_PLUGIN_NAME: embulk-output-bigquery
	GEM_HOST_API_KEY: "${{secrets.RUBYGEMS_API_KEY}}"

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