Module: BackupCleaner

Defined in:
lib/backup_cleaner.rb,
lib/backup_cleaner/cli.rb

Overview

See backup_cleaner/cli for API documentation

Defined Under Namespace

Modules: Cli Classes: Entry, GroupKey

Constant Summary collapse

DATE_PATTERN = 
/^(.*)(\d{4}[-\.]\d{2}[-\.]\d{2})(.*)$/

Class Method Summary collapse

Class Method Details

.clean_backups(folder, opts = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/backup_cleaner.rb', line 12

def self.clean_backups(folder, opts = {})
  days = opts[:days]
  weeks = opts[:weeks]
  dry_run = opts[:dry_run]

  raise ArgumentError, "'days' option must have an integer value" unless days.is_a? Integer
  raise ArgumentError, "'weeks' option must have an integer value" unless weeks.is_a? Integer
  raise ArgumentError, "#{folder} should be a directory" unless File.directory? folder

  entries = Dir.entries(folder).select { |name| DATE_PATTERN =~ name }.collect do |name|
    m = DATE_PATTERN.match(name)
    Entry.new(name, Date.parse(m[2]), m[1].gsub(/[^A-Za-z]/, ''), m[3].gsub(/[^A-Za-z]/, ''))
  end

  weekly_keepers = Set.new(first_by_date_property(entries, :week_ordering_number))
  monthly_keepers = Set.new(first_by_date_property(entries, :month_ordering_number))

  entries.each do |entry|
      unless entry.date >= days.days.ago.to_date ||
           (week_ordering_number(entry.date) >= week_ordering_number(weeks.weeks.ago.to_date) && weekly_keepers.member?(entry)) ||
           monthly_keepers.member?(entry)
      if dry_run
        puts "pretending to delete (dry_run) #{entry.name}"
      else
        puts "deleting #{entry.name}"
        FileUtils.rm_rf(File.join(folder, entry.name))
      end
    end
  end
end