Difftastic is an experimental structured diff tool that compares files based on their syntax.  See [the manual](http://difftastic.wilfred.me.uk/) to get started. Difftastic supports the following languages: * C * C++ * C# * Clojure * CSS * Elixir * Emacs Lisp * Go * Haskell * Java * JavaScript (and JSX) * JSON * OCaml * Python * Rust * TypeScript (and TSX) If a file has an unrecognised extension, difftastic uses a line-oriented diff. ## Known Issues Robustness. Difftastic is young and each release has fixed several crashes. Comprehensible display. Minimal diffs can be confusing: replacing one function with another may have a small amount of common punctuation even though they're completely unrelated. Alignment of slightly modified lines is a major challenge too. Changes to long lines. Difftastic uses a side-by-side display by default, which is unhelpful if the only changes are near the end of a line. Performance. Difftastic scales relatively poorly on files with a large number of changes, and can use a lot of memory. This might be solved by A* search. ## Non-goals Patch files. If you want to create a patch that you can later apply, use `diff`. Difftastic ignores whitespace, so its output is lossy. (AST patching is also a hard problem.) ## License Difftastic is open source under the MIT license, see LICENSE for more details. Files in `sample_files/` are also under the MIT license unless stated otherwise in their header. ## Further Reading The [wiki](https://github.com/Wilfred/difftastic/wiki) includes a thorough overview of alternative diffing techniques and tools.