mirror of https://github.com/Wilfred/difftastic/
98 lines
2.6 KiB
Markdown
98 lines
2.6 KiB
Markdown
<p align="center">
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<a href="#readme"><img src="img/logo.png" alt="it's difftastic!"/></a>
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<br>
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<a href="https://crates.io/crates/difftastic"><img src="https://img.shields.io/crates/v/difftastic.svg" alt="crates.io"></a>
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<a href="https://codecov.io/gh/Wilfred/difftastic"><img src="https://codecov.io/gh/Wilfred/difftastic/branch/master/graph/badge.svg?token=dZzAZtQT2S" alt="codecov.io"></a>
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<a href="http://difftastic.wilfred.me.uk/"><img src="https://img.shields.io/badge/manual-mdBook-brightgreen" alt="manual"></a>
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</p>
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Difftastic is an experimental structured diff tool that compares files
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based on their syntax.
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See [the manual](http://difftastic.wilfred.me.uk/) to get started.
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## Screenshots
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<!--
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To regenerate these screenshots:
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$ git clone git@github.com:rust-itertools/itertools.git
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$ cd itertools
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$ GIT_EXTERNAL_DIFF=difft git show --ext-diff 38805c6a882a9f00615078250ccc8c070c3a214d
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$ git clone git@github.com:stedolan/jq.git
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$ cd jq
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$ GIT_EXTERNAL_DIFF=difft git show --ext-diff 6306ac89667cf35f47ddc40aa0630546c57e387f
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$ git clone git@github.com:xmonad/xmonad.git
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$ cd xmonad
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$ GIT_EXTERNAL_DIFF=difft git show --ext-diff 6d661203d39e44d1dc2aa3a930381e6711d26d56
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-->
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## Languages
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Difftastic supports the following languages:
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* C
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* C++
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* C#
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* Clojure
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* CSS
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* Elixir
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* Emacs Lisp
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* Go
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* Haskell
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* Java
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* JavaScript (and JSX)
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* JSON
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* OCaml
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* Python
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* Rust
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* TypeScript (and TSX)
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If a file has an unrecognised extension, difftastic uses a
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line-oriented diff.
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## Known Issues
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Performance. Difftastic scales relatively poorly on files with a large
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number of changes, and can use a lot of memory. This might be solved
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by A* search.
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Display. Difftastic has a side-by-side display which usually works well, but can
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be confusing.
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Diff accuracy. Some delimiter moves are currently ignored (see
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[#30](https://github.com/Wilfred/difftastic/issues/30)).
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Integration. Difftastic only has [limited
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support](http://difftastic.wilfred.me.uk/getting_started.html#git-external-diffs)
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for git and mercurial today.
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## Non-goals
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Patch files. If you want to create a patch that you can later apply,
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use `diff`. Difftastic ignores whitespace, so its output is
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lossy. (AST patching is also a hard problem.)
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## License
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Difftastic is open source under the MIT license, see LICENSE for more
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details.
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Files in `sample_files/` are also under the MIT license unless stated
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otherwise in their header.
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## Further Reading
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The [wiki](https://github.com/Wilfred/difftastic/wiki) includes
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additional notes on alternative diffing techniques and tools.
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