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Tartrazine is a library to syntax-highlight code. It is Tartrazine is a library to syntax-highlight code. It is
a port of [Pygments](https://pygments.org/) to a port of [Pygments](https://pygments.org/) to
[Crystal](https://crystal-lang.org/). Kind of. [Crystal](https://crystal-lang.org/).
The CLI tool can be used to highlight many things in many styles. It also provides a CLI tool which can be used to highlight many things in many styles.
# A port of what? Why "kind of"? Currently Tartrazine supports 247 languages. and it has 331 themes (63 from Chroma, the rest are base16 themes via
Pygments is a staple of the Python ecosystem, and it's great.
It lets you highlight code in many languages, and it has many
themes. Chroma is "Pygments for Go", it's actually a port of
Pygments to Go, and it's great too.
I wanted that in Crystal, so I started this project. But I did
not read much of the Pygments code. Or much of Chroma's.
Chroma has taken most of the Pygments lexers and turned them into
XML descriptions. What I did was take those XML files from Chroma
and a pile of test cases from Pygments, and I slapped them together
until the tests passed and my code produced the same output as
Chroma. Think of it as *extreme TDD*.
Currently the pass rate for tests in the supported languages
is `96.8%`, which is *not bad for a couple days hacking*.
This only covers the RegexLexers, which are the most common ones,
but it means the supported languages are a subset of Chroma's, which
is a subset of Pygments'.
Currently Tartrazine supports ... 247 languages.
It has 331 themes (63 from Chroma, the rest are base16 themes via
[Sixteen](https://github.com/ralsina/sixteen) [Sixteen](https://github.com/ralsina/sixteen)
## Installation ## Installation
@ -58,7 +33,7 @@ $ tartrazine whatever.c -l c -t catppuccin-macchiato --line-numbers -f terminal
Generate a standalone HTML file from a C source file with the syntax highlighted: Generate a standalone HTML file from a C source file with the syntax highlighted:
```shell ```shell
$ tartrazine whatever.c -l c -t catppuccin-macchiato --line-numbers \ $ tartrazine whatever.c -t catppuccin-macchiato --line-numbers \
--standalone -f html -o whatever.html --standalone -f html -o whatever.html
``` ```
@ -87,3 +62,29 @@ puts formatter.format(File.read(ARGV[0]), lexer)
## Contributors ## Contributors
- [Roberto Alsina](https://github.com/ralsina) - creator and maintainer - [Roberto Alsina](https://github.com/ralsina) - creator and maintainer
## A port of what? Why "kind of"?
Pygments is a staple of the Python ecosystem, and it's great.
It lets you highlight code in many languages, and it has many
themes. Chroma is "Pygments for Go", it's actually a port of
Pygments to Go, and it's great too.
I wanted that in Crystal, so I started this project. But I did
not read much of the Pygments code. Or much of Chroma's.
Chroma has taken most of the Pygments lexers and turned them into
XML descriptions. What I did was take those XML files from Chroma
and a pile of test cases from Pygments, and I slapped them together
until the tests passed and my code produced the same output as
Chroma. Think of it as [*extreme TDD*](https://ralsina.me/weblog/posts/tartrazine-reimplementing-pygments.html)
Currently the pass rate for tests in the supported languages
is `96.8%`, which is *not bad for a couple days hacking*.
This only covers the RegexLexers, which are the most common ones,
but it means the supported languages are a subset of Chroma's, which
is a subset of Pygments' and DelegatingLexers (useful for things like template languages)
Then performance was bad, so I hacked and hacked and made it
significantly [faster than chroma](https://ralsina.me/weblog/posts/a-tale-of-optimization.html) which is fun.