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Lisp Cookbook

A Cookbook is an invaluable resource, as it shows how to do various things in a clear fashion without all the theoretical context. Sometimes you just need to look things up. While cookbooks can never replace proper documentation such as the HyperSpec or books such as Practical Common Lisp, every language deserves a good cookbook, Common Lisp included.

The CL Cookbook aims to tackle all sort of topics, for the beginner as for the more advanced developer.

Contributing

Thanks for contributing to the Cookbook.

You can start by having a look at the style guide.

When adding new content, please ensure it renders properly.

There are three ways to do this:

Install Jekyll system-wide

The first option is to install Jekyll globally and to run jekyll serve in a folder where this repository was checked out.

Then open http://127.0.0.1:4000/cl-cookbook/ (the last / is important).

Install system locally using Ruby gems

Another option is to install the Jekyll version of this repository locally with Ruby gems. Since bundler 1.17.3 requires Ruby 2.5 that is rather old, it is recommended to install it using rbenv:

  1. Install rbenv using your package manager, or follow these instructions to install it manually.
  2. Install ruby-build. If you did a manual installation in the previous step, it is recommended to install ruby-build as a rbenv plugin.
  3. Run rbenv install 2.5.0 to install Ruby 2.5.0. Run which gem to make sure it points to ~/.rbenv/shims/gem.
  4. Run gem install bundler -v 2.1.4 to install bundler.
  5. cd to the cl-cookbook directory and run bundle install --path vendor/bundle to install Jekyll locally.
  6. Run bundle exec jekyll serve to generate the site and host it.

Use a Docker container

Since it can be a bit troublesome to install older versions of Ruby onto newer Linux-based systems, another option is to use docker.

  1. Build the container by executing sudo docker build -t cl-cookbook . in this directory.
  2. Run Jekyll inside the container sudo docker run -p 4000:4000 -v $(pwd):/cl-cookbook cl-cookbook from this directory.
  3. Open your web browser and navigate to http://127.0.0.1:4000/cl-cookbook/.

This command will mount the current working directory into the container and incremental builds are actived so you will be able to see your latest changes without restarting or rebuilding the container.

Troubleshooting

It can happen that you have older version of ruby installed in the system and bundler install will fail. To fix this, you need to update ruby. If system update is not an option, consider installing rbenv.

    # Check rbenv homepage for install instructions on systems other than Mac OS X
    brew install rbenv ruby-build

    # Add rbenv to bash so that it loads every time you open a terminal
    echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
    source ~/.bash_profile

    # Install Ruby
    rbenv install 2.5.0
    rbenv global 2.5.0
    ruby -v

After this you can proceed as usual:

  1. gem install bundler
  2. bundle install --path vendor/bundle
  3. bundle exec jekyll serve

Also, refer to the CONTRIBUTING.md file.

Building the EPUB and the PDF

Run make epub. See make-cookbook.lisp.

You need a decently recent version of Calibre. They provide an easy binary installation.

To exclude regions of text from the output (for example, embedded videos that makes no sense in a print format), use these flags:

<!-- epub-exclude-start -->
<!-- epub-exclude-end -->

Our build script roughly does the following:

  • concatenate all markdown content into one file
  • change yaml frontmatters to a markdown title
  • delete the mark regions from the file
  • make internal links work on the EPUB.

It uses some metadata in metadata.txt.

We can check the resulting EPUB with epubcheck.

Origins

This is a fork of the Common Lisp Cookbook, moved from SourceForge.

This project brings the Common Lisp Cookbook to this decade. Development of the original Common Lisp Cookbook in SourceForge halted in 2007. In the meantime, a lot has happened in the land of Common Lisp. Tools and implementations have been improving, and some have fallen out of favor. Most notably, Common Lisp users can now benefit from the Quicklisp library manager.

The main goal is making the Cookbook more modern and more accessible in addition to updating and expanding the content.

Development with GNU Guix

To enter a development environment in which all the required software dependencies are made available, run guix shell in the project's root directory. The provided Guix manifest file will be automatically sourced after giving authorization for Guix to do so.

Support

You can support the individuals that constantly improve the Cookbook. See the Github Sponsors icon. Thanks for them!

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