BigW Consortium Gitlab

database.rb 2.41 KB
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require 'yaml'

module Backup
  class Database
    attr_reader :config, :db_dir

    def initialize
      @config = YAML.load_file(File.join(Rails.root,'config','database.yml'))[Rails.env]
      @db_dir = File.join(Gitlab.config.backup.path, 'db')
      FileUtils.mkdir_p(@db_dir) unless Dir.exists?(@db_dir)
    end

    def dump
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      success = case config["adapter"]
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      when /^mysql/ then
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        $progress.print "Dumping MySQL database #{config['database']} ... "
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        system('mysqldump', *mysql_args, config['database'], out: db_file_name)
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      when "postgresql" then
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        $progress.print "Dumping PostgreSQL database #{config['database']} ... "
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        pg_env
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        system('pg_dump', config['database'], out: db_file_name)
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      end
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      report_success(success)
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      abort 'Backup failed' unless success
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    end

    def restore
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      success = case config["adapter"]
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      when /^mysql/ then
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        $progress.print "Restoring MySQL database #{config['database']} ... "
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        system('mysql', *mysql_args, config['database'], in: db_file_name)
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      when "postgresql" then
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        $progress.print "Restoring PostgreSQL database #{config['database']} ... "
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        # Drop all tables because PostgreSQL DB dumps do not contain DROP TABLE
        # statements like MySQL.
        Rake::Task["gitlab:db:drop_all_tables"].invoke
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        Rake::Task["gitlab:db:drop_all_postgres_sequences"].invoke
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        pg_env
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        system('psql', config['database'], '-f', db_file_name)
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      end
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      report_success(success)
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      abort 'Restore failed' unless success
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    end

    protected

    def db_file_name
      File.join(db_dir, 'database.sql')
    end

    def mysql_args
      args = {
        'host'      => '--host',
        'port'      => '--port',
        'socket'    => '--socket',
        'username'  => '--user',
        'encoding'  => '--default-character-set',
        'password'  => '--password'
      }
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      args.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
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    end

    def pg_env
      ENV['PGUSER']     = config["username"] if config["username"]
      ENV['PGHOST']     = config["host"] if config["host"]
      ENV['PGPORT']     = config["port"].to_s if config["port"]
      ENV['PGPASSWORD'] = config["password"].to_s if config["password"]
    end
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    def report_success(success)
      if success
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        $progress.puts '[DONE]'.green
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      else
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        $progress.puts '[FAILED]'.red
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      end
    end
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  end
end