Module: XML2CSV

Defined in:
lib/xml2csv.rb,
lib/xml2csv/version.rb

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Class Method Details

.get_content(node, param) ⇒ Object 



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# File 'lib/xml2csv.rb', line 11

def get_content(node, param)
  key, values = param.to_a.first

  case key
  when "join"
    values.split(/,/).map{|value|
      node.xpath(value).map{|v| v.content.chomp}.join("-")
    }.join("_")
  when "pair"
    values.split(/,/).map{|value|
      node.xpath(value).map{|v| v.content.chomp}
    }
  when "with"
    wkey, wvalues = values.split(/:/, 2)

    wvalues.split(/,/).map{|value|
      node.xpath([wkey, value].join("/")).map{|v| v.content.chomp}.join("-")
    }
  when "digest"
    keys = values.split(/,/).map{|value|
      node.xpath(value).map{|v| v.content.chomp}
    }

    Digest::MD5.hexdigest keys.join
  when "with_order"
    ret = values.split(/,/).map{|value|
      if v = node.at_xpath(value)
        v.content.chomp
      else
        ""
      end
    }

    ret.empty? ? nil : ret.unshift(node.parent.children.index(node))
  else
    values.split(/,/).map{|value|
      case key
      when "tag"
        value
      when "node", "xpath" then
        ret = node.xpath(value).map{|v| v.content.chomp}
        ret.empty? ? nil : ret
      when "attr" then
        ret = node[value]
        ret.nil? ? nil : ret.chomp
      end
    }
  end
end

.parse_params(argv) ⇒ Object 



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# File 'lib/xml2csv.rb', line 69

def parse_params(argv)
  Hash[*argv.split(/:/, 2)]
end

.parse_xml(xml_io, root_node, parameters) ⇒ Object 



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# File 'lib/xml2csv.rb', line 61

def parse_xml(xml_io, root_node, parameters)
  Nokogiri::XML(xml_io).xpath("//#{root_node}").map do |node|
    parameters.flat_map{|param|
      get_content(node, param)
    }
  end
end

.xml2csv ⇒ Object 



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# File 'lib/xml2csv.rb', line 73

def xml2csv
  Signal.trap("PIPE", "EXIT")

  args = Slop.parse{
    on :h, :help
    on :F=, '[field separater]'
    on :"no-header"
  }.to_hash

  if args.delete(:help)
    puts HELP
    exit
  end

  if col_sep = args.delete(:F)
    ["-F", col_sep].each{|s| ARGV.delete s}
    col_sep = eval %Q{"#{col_sep}"}
  end

  if no_header = args.delete(:"no-header")
    ARGV.delete "--no-header"
  end

  xml_io     = $stdin.tty? ? File.read(ARGV.shift) : $stdin.read
  root_node  = ARGV.shift
  parameters = ARGV.map{|argv| parse_params(argv)}

  header = parameters.map{|h|
    h.each_pair.map{|k,v|
      v.split(/,/).map{|_v| File.basename _v}
    }
  }.flatten

  csv_options = {force_quotes: true, headers: header, write_headers: true}

  if col_sep
    csv_options.merge! col_sep: col_sep
    csv_options.delete :force_quotes
  end

  if no_header
    [:headers, :write_headers].each{|key|
      csv_options.delete key
    }
  end

  print CSV.generate("", csv_options){|csv|
    parse_xml(xml_io, root_node, parameters).each{|row|
      row = row.flatten
      csv << row unless row.empty?
    }
  }
end