Module: SimpleBackup

Defined in:
lib/rails_simple_backup_restore/simple_backup.rb

Class Method Summary collapse

Class Method Details

.backup ⇒ Object 



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# File 'lib/rails_simple_backup_restore/simple_backup.rb', line 26

def self.backup
  init
  
  input_filenames = ["config/backup_version"]
  
  SerializationHelper::Base.new(YamlDb::Helper).dump db_dump_path
  
  input_filenames << db_dump_path
  
  input_filenames += current_backup_files
  
  zip = nil
  Dir.mktmpdir 'simple_backup' do |dir|
    zip_path = File.join(dir, "backup.zip")
    Zip::ZipFile.open(zip_path, Zip::ZipFile::CREATE) do |zipfile|
      input_filenames.each do |filename|
        zipfile.add(filename, Rails.root.join(filename))
      end
    end
    zip = File.open(zip_path, 'r')
  end
  zip
end

.current_backup_files ⇒ Object 



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# File 'lib/rails_simple_backup_restore/simple_backup.rb', line 8

def self.current_backup_files
  files = []
  backup_files_path = Rails.root.join("config", "backup_files")
  if backup_files_path.exist?
    backup_files_path.each_line do |line|
      Dir[line.strip].each do |path|
        next if File.directory?(path)
        files << path
      end
    end
  end
  files
end

.db_dump_path ⇒ Object 



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# File 'lib/rails_simple_backup_restore/simple_backup.rb', line 22

def self.db_dump_path
  "db/data.yml"
end

.init ⇒ Object 



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# File 'lib/rails_simple_backup_restore/simple_backup.rb', line 2

def self.init
  require 'tmpdir'
  require 'zip/zip'
  require 'yaml_db'
end

.restore(file) ⇒ Object 



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# File 'lib/rails_simple_backup_restore/simple_backup.rb', line 50

def self.restore(file)
  init
  
  Dir.mktmpdir 'simple_restore' do |dir|
    Zip::ZipFile.open(file.path) do |zip|
      version = zip.find_entry "config/backup_version"
      raise "Invalid a backup file" unless version
      current_version = File.read("config/backup_version")
      raise "Backup version mismatch" if current_version != zip.read("config/backup_version")
      
      current_backup_files.each do |file|
        File.delete(file)
      end
      
      zip.each do |entry|
        File.open(entry.name, "wb") { |f| f.write entry.get_input_stream.read }
      end
      
      SerializationHelper::Base.new(YamlDb::Helper).load db_dump_path
    end
  end
end