问题
I've looked at diff-lcs ( http://raa.ruby-lang.org/project/diff-lcs ) but it's poorly documented, and appears to be unmaintained.
Are there any good, actively maintained ruby gems for diffing text or html files?
回答1:
I looked around and couldn't find an existing gem or library that offered a convenient way to generate diff style output from ruby.
I just released diffy which does what I want. It's a lightweight wrapper around diff which lets you generate text or html diffs from two strings, without a lot of fuss. I hope others find it useful. It's in use on wiff.me for anyone wants to preview the html output.
回答2:
I did some very recent searching and discovered that diff-lcs is an actively supported library again. It is now hosted at halostatue/diff-lcs on GitHub. The recent activity seems to be because one of the authors of Grit, the object-oriented git library for Ruby, added it as a dependency. Grit runs gollom, the GitHub wiki system. If GitHub is a supporter of the library then it's probably safe to say that diff-lcs will remain active for a long time.
回答3:
I don't know about "good"ness, but some places you might go for more information include:
SO search for "ruby diff"
- diff a ruby string or array
- Diff two XML doc in Ruby?
- how do i compare 2 html pages, and output only the different bits in ruby or PHP?
Google search for "ruby diff"
- http://www.ruby-forum.com/topic/168365
- http://www.freshports.org/textproc/ruby-diff/
来源：https://stackoverflow.com/questions/3128374/what-is-the-best-diff-library-in-ruby