Chef

[chore] Update documentation example with proper variable (#3958) #1

	name: Chef

	# This workflow is triggered by any change in deployments/chef/metadata.rb of the main branch.
	# The 'version' property is read from this file, and a new 'chef-v<VERSION>' tag is pushed if it does not already exist.

	on:
	push:
	paths:
	- '.github/workflows/chef.yml'
	- 'deployments/chef/metadata.rb'
	branches:
	- main

	permissions:
	contents: write

	jobs:
	push-release-tag:
	name: Push Release Tag
	# Use 20.04.5 until https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/16450 is resolved
	runs-on: ubuntu-20.04
	if: github.ref == 'refs/heads/main'
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Read version from metadata.rb
	id: read-metadata
	run: \|
	version=$( grep -E "^version " deployments/chef/metadata.rb \| sed -Ee "s/version '(.*)'/\1/" )
	if [ -z "$version" ]; then
	echo "Failed to get version from deployments/chef/metadata.rb"
	exit 1
	fi
	echo "version=${version}" >> $GITHUB_OUTPUT

	- name: Push new release tag if it doesn't exist
	uses: actions/github-script@v6
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	script: \|
	const tagRef = "tags/chef-v${{ steps.read-metadata.outputs.version }}"
	const existingRefs = await github.rest.git.listMatchingRefs({
	owner: context.repo.owner,
	repo: context.repo.repo,
	ref: tagRef
	})
	if (existingRefs.data.length === 0) {
	await github.rest.git.createRef({
	owner: context.repo.owner,
	repo: context.repo.repo,
	ref: "refs/" + tagRef,
	sha: context.sha
	})
	} else {
	console.log(tagRef + " already exists")
	}

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