guard guardfile for monitoring changes and deletions of *.ics files

Guardfile2

# A sample Guardfile
# More info at https://github.com/guard/guard#readme

require "/Users/dhall/work/scripts/ruby/calendars/cal_concatenator"
require 'logger'
require 'guard/guard'

module ::Guard
  class CalGuard < ::Guard::Guard
    
    def concatenate(paths)
      logs_dir = "/Users/dhall/work/scripts/ruby/calendars/logs"
      destination_dir = "/Users/dhall/work/scripts/ruby/calendars/results"
      log = Logger.new("#{logs_dir}/ics_mod.log", 'monthly')
      log.level = Logger::INFO
      catter = CalConcatenator.new
      paths.grep(/^.+\.ics$/).each do |modfile|
        puts modfile # print the filename when received.
        apple_guid = CalConcatenator.apple_guid(modfile)
        unless apple_guid
          log.error "An apple-generateduid could not be found within '#{filename}'."
          return(exit)
        end
        common_name = CalConcatenator.get_common_name(apple_guid)
        unless common_name
          log.error "The common name could not be determined for apple-generateduid: '#{apple_guid}'."
          return(exit)
        end
        last_slash_pos = modfile.rindex('/')
        parent_dirname = modfile[0,last_slash_pos]
        unless File.directory? parent_dirname
          log.error "Folder: '#{parent_dirname}' was not found."
          return(exit)
        end
        
        outfilepath = File.join(destination_dir, "#{common_name}.ics")  
        catter.concatenate_calendars(parent_dirname, outfilepath)
        if File.exists?(outfilepath)
          log.info("The #{common_name} calendar was modified.")
        else
          log.info("The #{common_name} calendar was deleted.")
        end
      end
    end
    
    def run_on_change(paths)
      concatenate(paths)
    end

    def run_on_deletion(paths)
      concatenate(paths)
    end
  end
end

ignore_paths 'wi'
guard 'calguard'