Script I use to check public API diffs between pod specs

public_diff.rb

#!/usr/bin/env ruby

require 'cocoapods'

def get_public_changes_between_versions(path, podspec, old_tag, new_tag)
    pathlist = Pod::Sandbox::PathList.new(Pathname.new(path))
    headers = []

    spec = Pod::Specification.from_file podspec
    # https://github.com/CocoaPods/cocoadocs.org/issues/35
    [spec, *spec.recursive_subspecs].each do |internal_spec|
      internal_spec.available_platforms.each do |platform|
        consumer = Pod::Specification::Consumer.new(internal_spec, platform)
        accessor = Pod::Sandbox::FileAccessor.new(pathlist, consumer)

        # puts accessor.public_headers(true)
        public_headers = accessor.public_headers(true)
        if public_headers
          headers += public_headers.map(&:to_s)
        else
          puts "Skipping headers for #{internal_spec} on platform #{platform} (no headers found).".blue
        end
      end
    end

    headers.uniq
end

unless ARGV.count == 4
  puts "usage: ./public_diff.rb <path> <podspec> <old_tag> <new_tag>"
  exit(-1)
end

# Input
#
# path -> path to checked out project
# podspec -> path to podspec 
# old_tag -> tag of old commit
# new_tag -> tag of new commit
#

path = ARGV[0]
podspec = ARGV[1]
old_tag = ARGV[2]
new_tag = ARGV[3]

headers = get_public_changes_between_versions(path, podspec, old_tag, new_tag)
# puts headers

Dir.chdir path
puts "path = #{Dir.pwd}"

headers.each do |header|
  h_path = header.sub(path, ".")
  system "git diff #{old_tag} #{new_tag} '#{h_path}'"
end

Dir.chdir ".."