Post TeamCity build status to GitHub

teamcity_github_status.rb

#!/usr/bin/env ruby

require 'bundler/setup'
require 'rest-client'
require 'json'

teamcity_url = ENV['TEAMCITY_URL']
build_num = ENV['BUILD_NUMBER']
build_type = ENV['BUILD_TYPE']
github_token = ENV['GITHUB_TOKEN']
github_repo = ENV['GITHUB_REPO']

unless (teamcity_url and build_num and build_type and github_token and github_repo)
  puts "please specify TEAMCITY_URL, BUILD_NUMBER, BUILD_TYPE, GITHUB_REPO and GITHUB_TOKEN environment variables"
  exit 1
end

tc_url = "#{teamcity_url}httpAuth/app/rest/builds/buildType:#{build_type},number:#{build_num}"


res = JSON.parse(RestClient.get(tc_url, accept: :json))

commit_sha = res["revisions"]["revision"].first["version"]
post_data = { state: res["status"].downcase,
              target_url: res["webUrl"],
              description: res["statusText"]
            }

gh_url = "https://api.github.com/repos/#{github_repo}/statuses/#{commit_sha}"

puts RestClient.post gh_url, post_data.to_json, { content_type: :json, authorization: "token #{github_token}" }