Save disk space for victims of CocoaPods

save_space.rb

gem 'cocoapods', '1.7.4'# only 1.7.4 tested.

require 'cocoapods'


module Pod
    class Installer
        def clean_pod_sources
            UI.message "prevent default clean_pod_sources"
        end
    end
end

module Pod
    module Downloader
        def self.download(
            request,
            target,
            can_cache: true,
            cache_path: Config.instance.cache_root + 'Pods'
          )
            can_cache &&= !Config.instance.skip_download_cache
      
            request = preprocess_request(request)
      
            if can_cache
              raise ArgumentError, 'Must provide a `cache_path` when caching.' unless cache_path
              cache = Cache.new(cache_path)
              result = cache.download_pod(request)
            else
              raise ArgumentError, 'Must provide a `target` when caching is disabled.' unless target
      
              require 'cocoapods/installer/pod_source_preparer'
              result, = download_request(request, target)
              Installer::PodSourcePreparer.new(result.spec, result.location).prepare!
            end
      
            if target && result.location && target != result.location
              UI.message "Symlinking #{request.name} from `#{result.location}` to #{UI.path target}", '> ' do
                FileUtils.rm_rf target
                FileUtils.symlink(result.location, target)
              end
            end
            result
          end
    end
end



module Pod
    class Sandbox
      
      class PathList
        def read_file_system
            unless root.exist?
              raise Informative, "Attempt to read non existent folder `#{root}`."
            end
    
            dirs = []
            files = []
            root_length = root.cleanpath.to_s.length + File::SEPARATOR.length
            Dir.glob(root.to_s + '/**/**/**') do |f|
              directory = File.directory?(f)
              f = f.slice(root_length, f.length - root_length)
              next if f.nil?
    
              (directory ? dirs : files) << f
            end
    
            dirs.sort_by!(&:upcase)
            files.sort_by!(&:upcase)
    
            @dirs = dirs
            @files = files
            @glob_cache = {}
          end
      end
    end
end  

Just import this file in the Podfile.