Hawkular Services pipeline script to publish artifacts on a GitHub release

publish-to-github-release.rb

#!/usr/bin/env ruby

require 'rest-client'
require 'json'
require 'open-uri'
require 'digest'

organization = 'hawkular'
repository = 'hawkular-services'

username = ENV['GITHUB_USERNAME']
password = ENV['GITHUB_PASSWORD']
release_tag = ENV['MVN_RELEASE_VERSION']

group_artifacts_to_upload = ['org.hawkular.services:hawkular-services-dist:zip', 'org.hawkular.services:hawkular-services-dist:tar.gz']

base_local_path = "/home/jenkins/.m2/repository"
base_nexus_url = "https://repository.jboss.org/nexus/service/local/repositories/releases/content"
base_url = "https://#{username}:#{password}@api.github.com"
base_url_upload = "https://#{username}:#{password}@uploads.github.com"

begin
  release = JSON.parse(RestClient.get("#{base_url}/repos/#{organization}/#{repository}/releases/tags/#{release_tag}").body)
  puts "Publishing to the existing release: #{release_tag}"
rescue RestClient::NotFound
  puts "Creating new release on GitHub: #{release_tag}"
  release_response = RestClient.post "#{base_url}/repos/#{organization}/#{repository}/releases", { tag_name: release_tag }.to_json, :content_type => :json, :accept => :json
  release = JSON.parse(release_response)
end

# assets of a release:
github_existing_assets = JSON.parse(RestClient.get("#{base_url}/repos/#{organization}/#{repository}/releases/#{release['id']}/assets"))

group_artifacts_to_upload.each do | group_artifact |
  group, artifact, type = group_artifact.split ':'
  base_maven_path = "#{group.gsub(/\./, '/')}/#{artifact}/#{release_tag}"
  main_artifact = "#{artifact}-#{release_tag}.#{type}"
  checksum = "#{main_artifact}.sha1"
  [main_artifact, checksum].each do | asset |
    if github_existing_assets.select { | item | item['name'] == asset }.empty?
      artifact_contents = nil
      local_artifact = "#{base_local_path}/#{base_maven_path}/#{asset}"
      remote_artifact = "#{base_nexus_url}/#{base_maven_path}/#{asset}"
      if File.exist? local_artifact
        puts "Using local artifact #{local_artifact}"
        File.open(local_artifact, 'r') do | file |
          artifact_contents = file.read
        end
      else
        puts "Using remote artifact #{remote_artifact}"
        temp_artifact = Tempfile.open(asset) do | file |
          file.write open(remote_artifact).read
          file.rewind

          unless asset.end_with? '.sha1'
            checksum_actual = Digest::SHA1.file file.path

            checksum_expected = nil
            if File.exist? "#{local_artifact}.sha1"
              checksum_expected = open("#{local_artifact}.sha1").read
            else
              checksum_expected = open("#{remote_artifact}.sha1").read
            end

            unless checksum_actual == checksum_expected
              raise "The SHA1 checksum for #{asset} doesn't match the expected checksum from #{remote_artifact}.sha1. Actual checksum: #{checksum_actual}"
            end
          end

          artifact_contents = file.read
        end
      end

      upload_url = "#{base_url_upload}/repos/#{organization}/#{repository}/releases/#{release['id']}/assets?name=#{asset}"

      puts "Uploading #{asset} to release #{release_tag}"
      RestClient::Request.execute(
        method: :post,
        url: upload_url,
        headers: {'Content-Type' => 'application/zip'},
        payload: artifact_contents
      )
    else
      puts "The asset #{asset} already exists for this release. Skipping the upload. To override, manually delete the asset from GitHub and re-run this script."
    end
  end
end

puts "Finished creating the release and uploading the assets to GitHub"