get a list of all service hooks across an organization in GitHub

authorizations.rb

require 'octokit'
require 'set'

TOKEN = ENV['GITHUB_TOKEN'] || (raise "Please set GITHUB_TOKEN.")
ORG = ENV['ORG'] || (raise "Please set ORG as the organization name.")

Octokit.auto_paginate = true
client = Octokit::Client.new(access_token: TOKEN)

# default to an empty Set for each key
repos_per_service = Hash.new{ |hash, key| hash[key] = Set.new }

repos = client.organization_repositories(ORG)
repos.each do |repo|
  hooks = client.hooks(repo.full_name)
  hooks.each do |hook|
    if hook.name == 'web'
      uri = URI(hook.config.url)
      hook_key = uri.host
    else
      # it's a "service"
      # https://github.com/integrations
      # https://developer.github.com/webhooks/#service-hooks
      hook_key = hook.name
    end

    repos_per_service[hook_key] << repo
  end

  print '.'
end

puts ''

services = repos_per_service.keys
# note that some repositories may use the same service more than once
services.sort_by!{ |service| repos_per_service[service].length }.reverse!
services.each do |service|
  repos = repos_per_service[service]
  repo_names = repos.map(&:name).sort.join(',')
  puts "#{service.ljust(35)} #{repo_names}"
end