Ruby LoadError issue with 'require' - ruby-on-rails

Question

I have researched this for quite some time, and have yet to solve my issue. Here is the error that I am receiving:
C:/Ruby23/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- nexpose-runner/constants (LoadError)
from C:/Ruby23/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from scan.rb:4:in `<main>'
Here is my code:
require 'nexpose'
require 'csv'
require 'json'
require 'nexpose-runner/constants'
require 'nexpose-runner/scan_run_description'
module NexposeRunner
module Scan
def Scan.start(options)
run_details = ScanRunDescription.new(options)
run_details.verify
nsc = get_new_nexpose_connection(run_details)
site = create_site(run_details, nsc)
start_scan(nsc, site, run_details)
reports = generate_reports(nsc, site, run_details)
verify_run(reports[0])
end
def self.generate_reports(nsc, site, run_details)
puts "Scan complete for #{run_details.site_name}, Generating Vulnerability Report"
vulnerbilities = generate_report(CONSTANTS::VULNERABILITY_REPORT_QUERY, site.id, nsc)
generate_csv(vulnerbilities, CONSTANTS::VULNERABILITY_REPORT_NAME)
puts "Scan complete for #{run_details.site_name}, Generating Vulnerability Detail Report"
vuln_details = generate_report(CONSTANTS:: VULNERABILITY_DETAIL_REPORT_QUERY, site.id, nsc)
generate_csv(vuln_details, CONSTANTS::VULNERABILITY_DETAIL_REPORT_NAME)
puts "Scan complete for #{run_details.site_name}, Generating Software Report"
software = generate_report(CONSTANTS::SOFTWARE_REPORT_QUERY, site.id, nsc)
generate_csv(software, CONSTANTS::SOFTWARE_REPORT_NAME)
puts "Scan complete for #{run_details.site_name}, Generating Policy Report"
policies = generate_report(CONSTANTS::POLICY_REPORT_QUERY, site.id, nsc)
generate_csv(policies, CONSTANTS::POLICY_REPORT_NAME)
puts "Scan complete for #{run_details.site_name}, Generating Audit Report"
generate_template_report(nsc, site.id, CONSTANTS::AUDIT_REPORT_FILE_NAME, CONSTANTS::AUDIT_REPORT_NAME, CONSTANTS::AUDIT_REPORT_FORMAT)
puts "Scan complete for #{run_details.site_name}, Generating Xml Report"
generate_template_report(nsc, site.id, CONSTANTS::XML_REPORT_FILE_NAME, CONSTANTS::XML_REPORT_NAME, CONSTANTS::XML_REPORT_FORMAT)
[vulnerbilities, software, policies]
end
def self.verify_run(vulnerabilities)
raise StandardError, CONSTANTS::VULNERABILITY_FOUND_MESSAGE if vulnerabilities.count > 0
end
def self.start_scan(nsc, site, run_details)
puts "Starting scan for #{run_details.site_name} using the #{run_details.scan_template} scan template"
scan = site.scan nsc
begin
sleep(3)
stats = nsc.scan_statistics(scan.id)
status = stats.status
puts "Current #{run_details.site_name} scan status: #{status.to_s} -- PENDING: #{stats.tasks.pending.to_s} ACTIVE: #{stats.tasks.active.to_s} COMPLETED #{stats.tasks.completed.to_s}"
end while status == Nexpose::Scan::Status::RUNNING
end
def self.create_site(run_details, nsc)
puts "Creating a nexpose site named #{run_details.site_name}"
site = Nexpose::Site.new run_details.site_name, run_details.scan_template
run_details.ip_addresses.each { |address|
site.add_ip address
}
if run_details.engine
site.engine = run_details.engine
end
site.save nsc
puts "Created site #{run_details.site_name} successfully with the following host(s) #{run_details.ip_addresses.join(', ')}"
site
end
def self.get_new_nexpose_connection(run_details)
nsc = Nexpose::Connection.new run_details.connection_url, run_details.username, run_details.password, run_details.port
nsc.login
puts 'Successfully logged into the Nexpose Server'
nsc
end
def self.generate_report(sql, site, nsc)
report = Nexpose::AdhocReportConfig.new(nil, 'sql')
report.add_filter('version', '1.3.0')
report.add_filter('query', sql)
report.add_filter('site', site)
report_output = report.generate(nsc)
CSV.parse(report_output.chomp, {:headers => :first_row})
end
def self.generate_template_report(nsc, site, file_name, report_name, report_format)
adhoc = Nexpose::AdhocReportConfig.new(report_name, report_format, site)
data = adhoc.generate(nsc)
File.open(file_name, 'w') { |file| file.write(data) }
end
def self.generate_csv(csv_output, name)
CSV.open(name, 'w') do |csv_file|
csv_file << csv_output.headers
csv_output.each do |row|
csv_file << row
if name == CONSTANTS::VULNERABILITY_REPORT_NAME
puts '--------------------------------------'
puts "IP: #{row[0]}"
puts "Vulnerability: #{row[1]}"
puts "Date Vulnerability was Published: #{row[2]}"
puts "Severity: #{row[3]}"
puts "Summary: #{row[4]}"
puts '--------------------------------------'
end
end
end
end
end
end
In the command prompt, I am entering in the following code to run it (this file is called scan.rb):
ruby scan.rb "http://localhost:3780" "username" "password" "3780" "webpage" "ip-address" "full-audit-widget-corp"
So far, I've tried changing require to require_relative, as well as re-arranging the paths (like putting the whole path, for example). Neither has worked.
I also made sure to have the Ruby Development Kit installed.
Thanks!

Answer 1

please check the local gem list: gem list --local