nokogiri-diff

Description

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 the differences between two HTML documents:

require ‘nokogiri/diff’

doc1 = Nokogiri::HTML(‘

one

two

’)
doc2 = Nokogiri::HTML(‘

one

three

’)

doc1.diff(doc2) do |change,node|
puts “#{change} #{node.to_html}”.ljust(30) + node.parent.path
end

one

two

/
#

one

/div
# - two /div
# + /div
# +

three

/div
# + id=“1” /div/p[1]
# one /div/p

Only find the added nodes:

doc1.diff(doc2, :added => true) do |change,node|
puts node.to_html.ljust(30) + node.parent.path
end

# /div
#

three

/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-diff

See {file:LICENSE.txt} for details.