Build your Ruby application’s Docker image in just one line of code without writing any Dockerfile! You only need source-to-image tool (s2i, formally sti) and Docker.
What to do when running Vagrant with –debug flag is not enough? As Vagrant is nothing else than a Ruby program, you can use famous pry gem together with pry-byebug to debug it. The only thing you need to do to use pry from the Vagrant code base is to make sure it’s installed and […]
How to change pages’ URLs in Jekyll using a custom generator plugin.
Have you ever wanted to use Bundler’s internals in your codebase? Here is how how to start by creating your Gemfile.lock, locking the environment and reading back the locked dependencies.
gem-patch is a RubyGems plugin that helps you to patch gems. You can use it to apply security fixes or cherry-pick commits you want to apply to your .gem files. I use it to test whether the upstream commits containing vulnerability fixes apply cleanly on older gem releases so I can prepare fixed builds of […]
What do you usually do when releasing a new version of gems? Running test suite? Something more? I like to use my tool on tracking changes in RubyGems gem-compare as it gives me a little bit more confidence on what am I actually releasing. Here’s how I do it.
As you probably know, you can use eval() to evaluate Ruby code from Ruby. But evaluating things that come from the outside of the program like user inputs can be dangerous. Why they can be dangerous you ask? eval() evaluates anything as we would program it ourselves. Basically anything can happen. That’s why it’s best […]
Sometimes it happens that you want to run an old test suite, but you don’t have a correct version of the testing framework available. That happens a lot in Fedora since tooling around RPM supports only one version of each component and new rubies does not come with test/unit anymore. As we still need to […]
RubyGems started with a single marshaled file called Marshal.4.8.gz containing the array of every Gem::Specification object for every gem that has been uploaded to RubyGems directory. Since then we have new indexes for RubyGems to speed things up, but good old Marshal.4.8.gz is still around carrying important information about gems from RubyGems.org. Are you interested to […]