Archive::Tar::Minitar is a pure-Ruby library and command-line utility that provides the ability to deal with POSIX tar archive files.

Dotenv is a Ruby library for setting environment variables defined in a .env file. This is the Rails variant, adapted for use with Ruby on Rails projects.

Spy is a mocking library. By default, it will raise an error if you attempt to stub a method that doesn't exist or call the stubbed method with the wrong arity.

Arel is an SQL Abstract Syntax Tree (AST) manager for Ruby. It simplifies the generation of complex SQL queries and adapts to various relational database implementations.

A Ruby gem for tokenizing, parsing, and transforming regular expressions. It comprises the following components:

• A scanner/tokenizer based on Ragel,

• A lexer that produces a stream of token objects,

• A parser that produces a tree of Expression objects.

rubocop is a Ruby code style checking tool. It aims to enforce the community-driven Ruby Style Guide.

Creole is a lightweight markup language and this library for converting creole to HTML.

BRASS (Bare-Metal Ruby Assertion System Standard) is a basic foundational assertions framework for other assertion and test frameworks to make use of.

CountDownLatch is a synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.

Minitest-bacon extends minitest with bacon-like functionality, making it easier to migrate test suites from bacon to minitest.

This package provides a Ruby kernel for Jupyter/IPython frontends (e.g. notebook).

Rubytest CLI is a command-line interface for running tests for Rubytest-based test frameworks. It provides the rubytest executable.

Asciidoctor PDF is an extension for Asciidoctor that converts AsciiDoc documents to Portable Document Format (PDF) using the Prawn PDF library. It has features such as:

• Direct AsciiDoc to PDF conversion

• Configuration-driven theme (style and layout)

• Scalable Vector Graphics (SVG) support

• PDF document outline (i.e., bookmarks)

• Table of contents page(s)

• Document metadata (title, authors, subject, keywords, etc.)

• Internal cross reference links

• Syntax highlighting with Rouge, Pygments, or CodeRay

• Page numbering

• Customizable running content (header and footer)

• “Keep together” blocks (i.e., page breaks avoided in certain block content)

• Orphaned section titles avoided

• Autofit verbatim blocks (as permitted by base_font_size_min setting)

• Table border settings honored

• Font-based icons

• Custom TrueType (TTF) fonts

• Double-sided printing mode (margins alternate on recto and verso pages)

This package provides memory profiling routines for Ruby.

Systemu can be used on any platform to return status, stdout, and stderr of any command. Unlike other methods like open3 and popen4 there is no danger of full pipes or threading issues hanging your process or subprocess.

This library provides a high-level API that wraps the ZeroMQ networking library using the Ruby foreign function interface (FFI). It is a pure Ruby wrapper, hence is compatible with any Ruby runtime that has support for FFI.

This Ruby library provides an experimental logging system that tries to make logging more flexible and more consumable than plain-text logging.

Pathutil tries to be a faster pure Ruby implementation of Pathname.

Syntax Tree is a suite of tools built on top of the internal CRuby parser. It provides the ability to generate a syntax tree from source, as well as the tools necessary to inspect and manipulate that syntax tree. It can be used to build formatters, linters, language servers, and more.

Racc is a LALR(1) parser generator. It is written in Ruby itself, and generates Ruby program.

Nori is a simple XML parsing ripped from Crack which in-turn ripped from Merb. It supports pluggable parsers and ships with both REXML and Nokogiri implementations.

TTFunk is a TrueType font parser written in pure Ruby. It is used as part of the Prawn PDF generator.

When this gem is required, it extends the Time class with with additional methods for parsing and converting Times.

This package provides Rake tasks to generate and check a manifest file.