Go Pipeline Cause - Simplified (no materials check)

pipelinecause-simple.rb

# Based on feedback from the Go development team:
# url = "#{ENV['GO_SERVER_URL']}pipelines/#{ENV['GO_PIPELINE_NAME']}/#{ENV['GO_PIPELINE_COUNTER']}/#{ENV['GO_STAGE_NAME']}/#{ENV['GO_STAGE_COUNTER']}.xml"
# and lookup //approvedBy/text()

require 'rexml/document'
require 'net/http'
require 'time'

include REXML

if ARGV.length < 4 
    puts "USAGE: ruby pipelinecause-simple.rb [pipeline_name] [pipeline_counter] [stage_name] [stage_counter]"
    exit
end

user = "YOUR_USERNAME"
password = "YOUR_PASSWORD"
hostname = "YOUR_GO_HOSTNAME"
pipeline_name = ARGV[0]
pipeline_counter = ARGV[1]
stage_name = ARGV[2]
stage_counter = ARGV[3]

def get_xml_from_url(url, user, password)
    uri = URI(url)
    request = Net::HTTP::Get.new(uri.request_uri)
    request.basic_auth user, password
    response = Net::HTTP.start(uri.host, uri.port) do |http|
        http.request(request)
    end 

    xml_doc = nil 
    case response
    when Net::HTTPSuccess then
        xml_doc = Document.new(response.body)
    when Net::HTTPRedirection then
        puts "Redirecting to: #{response['location']}"
        xml_doc = get_xml_from_url(response['location'], user, password)
    else
        puts "I don't know what to do here!"
        puts response
    end 
    xml_doc
end

stages_url = "http://#{hostname}:8153/go/pipelines/#{pipeline_name}/#{pipeline_counter}/#{stage_name}/#{stage_counter}.xml"
stages_doc = get_xml_from_url stages_url, user, password

approved_by = XPath.first(stages_doc, "//approvedBy/text()")
pipeline_label_node = XPath.first(stages_doc, "//pipeline")
pipeline_label = pipeline_label_node.attributes["label"]
updated_time = XPath.first(stages_doc, "//updated/text()")

puts "Pipeline:      #{pipeline_name}"
puts "Label:         #{pipeline_label}"
puts "Build Cause:   #{approved_by.to_s}"
puts "Updated Time:  #{Time.parse(updated_time.to_s)}"