Given an array of Jenkins CI job names, the script will retrieve the details for each build and output the results into a JSON file. Uses the Jenkins API Client Ruby Gem.

Gemfile

source 'http://rubygems.org'
 
ruby "2.0.0"

gem "jenkins_api_client"
gem "pry"
gem "json"

jenkins_jobs_to_json.rb

require "jenkins_api_client"
require "yaml"
require "pry"
require "json"

cli = JenkinsApi::Client.new(YAML.load_file(File.expand_path("~/.jenkins_api_client/login.yml", __FILE__)))
line_break = "-------------------------------------------------------------------------------"

######################################################
##
## Functions
##
######################################################

header = lambda { |title|
  puts line_break
  puts title
  puts line_break
}

list_jobs = lambda {
  header.call "All Jobs"
  puts cli.job.list_all
}

get_latest_build_number = lambda { |job| 
  cli.job.get_current_build_number(job) 
}

get_builds = lambda { |job|
  header.call "Builds for #{job}"
  puts cli.job.get_builds(job)
}

get_build_details = lambda { |job, build_number| 
  cli.job.get_build_details(job, build_number) 
}


######################################################
##
## Work
##
######################################################

list_jobs.call

["MyProject-Development", "MyProject-Staging", "MyProject-Production"].each do |job|
  latest_build_number = get_latest_build_number.call(job)
  puts "Latest Build Number for '#{job}': #{latest_build_number}"

  builds = Range.new(1, latest_build_number).map do |build_number|
    begin
      get_build_details.call job, build_number
    rescue
      { :build_number => build_number, :failed => true }
    end
  end

  File.open("#{job.downcase}.json", "w") do |f|
    f.write(JSON.pretty_generate(builds))
  end

end

login.yml

# The Jenkins server and login information can be stored in a YAML file like this 
# so we don't have to pass in the parameters every we login to the server
# through this API client.

# This file contains the following four parameters

# The IP address of the Jenkins CI Server

:server_ip: 0.0.0.0

# The port number on which the Jenkins listens on. The default is 8080

:server_port: 8080

# If there is a web server routing your Jenkins requests you might need this

:jenkins_path: ""

# The username and password to authenticate to the server

:username: my_username

:password: my_password

# The priviate key file for Jenkins CLI authentication
# remember to upload the public key to http://#{server_ip}:#{server_port}/user/#{my_username}/configure
:identity_file: ~/.ssh/id_rsa