nokogiri-diff adds the ability to calculate the differences (added or removed nodes) between two XML/HTML documents.
- Performs a breadth-first comparison between children nodes.
- Compares XML/HTML Elements, Attributes, Text nodes and DTD nodes.
- Allows calculating differences between documents, or just enumerating the added or removed nodes.
Enumerate over the differences between two HTML documents:
require 'nokogiri/diff'
doc1 = Nokogiri::HTML('<div><p>one</p> two </div>')
doc2 = Nokogiri::HTML('<div><p id="1">one</p> <p>three</p></div>')
doc1.diff(doc2) do |change,node|
puts "#{change} #{node.to_html}".ljust(30) + node.parent.path
end
# <div>
# <p>one</p> two </div> /
# <p>one</p> /div
# - two /div
# + /div
# + <p>three</p> /div
# + id="1" /div/p[1]
# one /div/pOnly find the added nodes:
doc1.diff(doc2, :added => true) do |change,node|
puts node.to_html.ljust(30) + node.parent.path
end
# /div
# <p>three</p> /div
# id="1" /div/p[1]Only find the removed nodes:
doc1.diff(doc2, :removed => true) do |change,node|
puts node.to_html.ljust(30) + node.parent.path
end
# two /div$ gem install nokogiri-diffSee {file:LICENSE.txt} for details.