Question 1

How do I use Rouge with a Rails application?

Accepted Answer

Install the rouge-rails gem, add it to your Gemfile, and use it in views or helpers to highlight code snippets. It integrates smoothly with Rails' asset pipeline and templating systems.

Question 2

Rouge vs Prism: which is better for a static site?

Accepted Answer

Rouge is server-side and Ruby-based, ideal for Jekyll or Ruby-powered static sites, offering pre-rendered HTML. Prism is client-side JavaScript, better for dynamic sites needing in-browser highlighting without server dependencies.

Question 3

How can I customize the color theme in Rouge?

Accepted Answer

Use the `rougify` command with `-t` to specify a theme, or in Ruby code, instantiate a formatter with a theme like `Rouge::Formatters::HTMLInline.new(theme)`. Themes can be rendered to CSS files for further tweaking.

Question 4

Does Rouge support highlighting for TypeScript or modern JS features?

Accepted Answer

Yes, Rouge includes lexers for JavaScript and TypeScript, but support for the latest features depends on community updates; check the language list or contribute lexers if gaps exist.

Question 5

Can I use Rouge to highlight code in terminal output?

Accepted Answer

Absolutely, use formatters like `Terminal256` or `TerminalTruecolor` to generate ANSI-colored text, making it suitable for CLI tools or logging with colorized code snippets.

Question 6

How to add a new language lexer to Rouge?

Accepted Answer

Follow the lexer development guide in the documentation: write a lexer class defining token rules, test it with the provided tools, and submit a pull request or use it as a plugin for local use.

Question 7

Is Rouge faster than Pygments for large files?

Accepted Answer

Performance varies; Rouge is pure Ruby and may be slower than Pygments (Python) or native highlighters in some cases, but it's optimized for typical documentation use, not high-volume processing.

Rouge

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