How Ruby’s Community Turned Git and Redis into Industry Titans

In April 2005 both Git and Mercurial were released; Git started as a hacker‑oriented tool used mainly within the Linux kernel community, while Mercurial, written in Python, offered a more polished, cross‑platform experience and quickly gained users such as Mozilla Firefox, OpenJDK, Google and Facebook.

Git’s early Windows port relied on MinGW and performed poorly, whereas Mercurial’s Python implementation ran smoothly on Windows, leading many companies to prefer it.

At a Ruby meetup in October 2007, Tom Preston‑Werner became fascinated by the newly improved Git 1.5, which made the tool more user‑friendly. He created Grit, a Ruby library for accessing Git repositories, and, together with Chris Wanstrath, built the first version of GitHub in their spare time.

GitHub’s slogan, “Social Code Hosting”, introduced the fork + pull‑request workflow, dramatically simplifying collaboration compared with the email‑based patches required by SourceForge.

The Ruby on Rails community quickly embraced GitHub; in April 2008 Rails projects migrated from Subversion to GitHub, creating a ripple effect that attracted JavaScript developers and many other language communities.

As a result, Git became an essential tool for developers of all backgrounds, while Mercurial’s usage declined.

Ruby developers also accelerated Redis’s popularity. In 2009 a Google Code post about Redis caught Ezra Zygmuntowicz’s attention; he built a Ruby client, promoted the project, and helped integrate Redis into the Rails ecosystem, where it proved valuable for high‑concurrency caching and session storage. Twitter’s adoption later cemented Redis’s status.

The Ruby community also spawned tools such as Chef, Capistrano, Vagrant, Homebrew, Jekyll, and Travis CI, driven by Rails’ integrated stack, strong evangelism, and rapid sharing on blogs and Twitter.

However, the rise of front‑end frameworks (AngularJS, React, Vue) and the shift to micro‑services with Docker and Kubernetes reduced Rails’ relevance, and Ruby’s performance limitations hindered its adoption in high‑concurrency domains.

Nevertheless, the community’s legacy lives on, exemplified by José Valim’s creation of Elixir, which combines Ruby’s expressive syntax with the Erlang VM’s scalability.