Class: Hotdog::Commands::Untag

Inherits:
BaseCommand show all
Defined in:
lib/hotdog/commands/untag.rb

Instance Attribute Summary

Attributes inherited from BaseCommand

#application, #logger, #options, #persistent_db_path

Instance Method Summary collapse

Methods inherited from BaseCommand

#execute, #fixed_string?, #initialize, #parse_options, #reload

Constructor Details

This class inherits a constructor from Hotdog::Commands::BaseCommand

Instance Method Details

#define_options(optparse, options = {}) ⇒ Object 



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# File 'lib/hotdog/commands/untag.rb', line 8

def define_options(optparse, options={})
  default_option(options, :retry, 5)
  default_option(options, :tag_source, "user")
  default_option(options, :tags, [])
  optparse.on("--retry NUM") do |v|
    options[:retry] = v.to_i
  end
  optparse.on("--retry-delay SECONDS") do |v|
    options[:retry_delay] = v.to_i
  end
  optparse.on("--source SOURCE") do |v|
    options[:tag_source] = v
  end
  optparse.on("-a TAG", "-t TAG", "--tag TAG", "Use specified tag name/value") do |v|
    options[:tags] << v
  end
end

#run(args = [], options = {}) ⇒ Object 



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# File 'lib/hotdog/commands/untag.rb', line 26

def run(args=[], options={})
  hosts = args.map { |arg|
    arg.sub(/\Ahost:/, "")
  }

  if options[:tags].empty?
    # refresh all persistent.db since there is no way to identify user tags
    remove_db(@db)
  else
    # Try reloading database after error as a workaround for nested transaction.
    with_retry(error_handler: -> (error) { reload }) do
      if open_db
        @db.transaction do
          options[:tags].each do |tag|
            disassociate_tag_hosts(@db, tag, hosts)
          end
        end
      end
    end
  end

  hosts.each do |host|
    if options[:tags].empty?
      # delete all user tags
      with_retry do
        detach_tags(host, source=options[:tag_source])
      end
    else
      host_tags = with_retry { host_tags(host, source=options[:tag_source]) }
      old_tags = host_tags["tags"]
      new_tags = old_tags - options[:tags]
      if old_tags == new_tags
        # nop
      else
        with_retry do
          update_tags(host, new_tags, source=options[:tag_source])
        end
      end
    end
  end
end