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# File 'lib/nanoc3/cli/commands/update.rb', line 11

def aliases
  []
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 19

def long_desc
  'Update the data stored by the data source to a newer format. The ' +
  'format in which data is stored can change between releases, and ' +
  'even though backward compatibility is usually preserved, it is ' +
  'often a good idea to store the site data in a newer format so newer ' +
  'features can be taken advantage of.' +
  "\n" +
  'This command will change data, and it is therefore recommended to ' +
  'make a backup in case something goes wrong.'
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 7

def name
  'update'
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 34

def option_definitions
  [
    # --vcs
    {
      :long => 'vcs', :short => 'c', :argument => :required,
      :desc => 'select the VCS to use'
    },
    # --yes
    {
      :long => 'yes', :short => 'y', :argument => :forbidden,
      :desc => 'updates the data without warning'
    }
  ]
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 49

def run(options, arguments)
  # Check arguments
  if arguments.size != 0
    $stderr.puts "usage: #{usage}"
    exit 1
  end

  # Make sure we are in a nanoc site directory
  @base.require_site
  @base.site.load_data

  # Set VCS if possible
  @base.set_vcs(options[:vcs])

  # Check for -y switch
  unless options.has_key?(:yes)
    $stderr.puts '*************'
    $stderr.puts '** WARNING **'
    $stderr.puts '*************'
    $stderr.puts
    $stderr.puts 'Are you absolutely sure you want to update the ' +
                 'content for this site? Updating the site content ' +
                 'will change the structure of existing data. This ' +
                 'operation is destructive and cannot be reverted. ' +
                 'Please do not interrupt this operation; doing so can ' +
                 'result in data loss. As always, consider making a ' +
                 'backup copy.'
    $stderr.puts
    $stderr.puts 'If this nanoc site is versioned using a VCS ' +
                 'supported by nanoc, consider using the --vcs option ' +
                 'to have nanoc perform add/delete/move operations ' +
                 'using the specified VCS. To get a list of VCSes ' +
                 'supported by nanoc, issue the "info" command.'
    $stderr.puts
    $stderr.puts 'To continue, use the -y/--yes option, like "nanoc3 ' +
                 'update -y".'
    exit 1
  end

  # Update
  @base.site.data_sources.each do |data_source|
    data_source.update
  end
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 15

def short_desc
  'update the data stored by the data source to a newer version'
end

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# File 'lib/nanoc3/cli/commands/update.rb', line 30

def usage
  "nanoc3 update [options]"
end