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90 lines
3.0 KiB
Markdown
90 lines
3.0 KiB
Markdown
# TARTRAZINE
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Tartrazine is a library to syntax-highlight code. It is
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a port of [Pygments](https://pygments.org/) to
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[Crystal](https://crystal-lang.org/).
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It also provides a CLI tool which can be used to highlight many things in many styles.
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Currently Tartrazine supports 247 languages. and it has 331 themes (63 from Chroma, the rest are base16 themes via
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[Sixteen](https://github.com/ralsina/sixteen)
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## Installation
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From prebuilt binaries:
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Each release provides statically-linked binaries that should
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work on any Linux. Get them from the [releases page](https://github.com/ralsina/tartrazine/releases) and put them in your PATH.
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To build from source:
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1. Clone this repo
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2. Run `make` to build the `tartrazine` binary
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3. Copy the binary somewhere in your PATH.
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## Usage as a CLI tool
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Show a syntax highlighted version of a C source file in your terminal:
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```shell
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$ tartrazine whatever.c -l c -t catppuccin-macchiato --line-numbers -f terminal
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```
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Generate a standalone HTML file from a C source file with the syntax highlighted:
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```shell
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$ tartrazine whatever.c -t catppuccin-macchiato --line-numbers \
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--standalone -f html -o whatever.html
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```
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## Usage as a Library
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This works:
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```crystal
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require "tartrazine"
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lexer = Tartrazine.lexer("crystal")
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theme = Tartrazine.theme("catppuccin-macchiato")
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formatter = Tartrazine::Html.new
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formatter.theme = theme
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puts formatter.format(File.read(ARGV[0]), lexer)
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```
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## Contributing
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1. Fork it (<https://github.com/ralsina/tartrazine/fork>)
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2. Create your feature branch (`git checkout -b my-new-feature`)
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3. Commit your changes (`git commit -am 'Add some feature'`)
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4. Push to the branch (`git push origin my-new-feature`)
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5. Create a new Pull Request
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## Contributors
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- [Roberto Alsina](https://github.com/ralsina) - creator and maintainer
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## A port of what? Why "kind of"?
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Pygments is a staple of the Python ecosystem, and it's great.
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It lets you highlight code in many languages, and it has many
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themes. Chroma is "Pygments for Go", it's actually a port of
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Pygments to Go, and it's great too.
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I wanted that in Crystal, so I started this project. But I did
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not read much of the Pygments code. Or much of Chroma's.
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Chroma has taken most of the Pygments lexers and turned them into
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XML descriptions. What I did was take those XML files from Chroma
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and a pile of test cases from Pygments, and I slapped them together
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until the tests passed and my code produced the same output as
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Chroma. Think of it as [*extreme TDD*](https://ralsina.me/weblog/posts/tartrazine-reimplementing-pygments.html)
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Currently the pass rate for tests in the supported languages
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is `96.8%`, which is *not bad for a couple days hacking*.
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This only covers the RegexLexers, which are the most common ones,
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but it means the supported languages are a subset of Chroma's, which
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is a subset of Pygments' and DelegatingLexers (useful for things like template languages)
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Then performance was bad, so I hacked and hacked and made it
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significantly [faster than chroma](https://ralsina.me/weblog/posts/a-tale-of-optimization.html) which is fun. |