How to extract a Ruby gem
The rubygems binary gem allows to extract a local gem with gem unpack GEMNAME. For more details see the official
documentation
Show archive.org snapshot
.
This was useful for compliance checks, when it was necessary to check the license of the C-files in nokogiri.
Related cards:
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
How to split a Ruby class into multiple source files - Gem Session
Unfortunately vanilla Ruby modules lack support for many idioms popular in modern Ruby. Most importantly, we have become accustomed to composing our classes with meta-programming macros such as has_many, validates_presence_of or after_save. And mo...
How to get information about a gem (via CLI or at runtime from Ruby)
When you need information about a gem (like version(s) or install path(s)), you can use the gem binary from the command line, or the Gem API inside a ruby process at runtime.
gem binary (in a terminal)
You can get some information abou...
Ruby: How to connect to a host with expired SSL certificate
If you need to make an HTTPS connection to a host which uses an expired certificate, do not disable certificate verifications entirely. Doing that enables e.g. man in the middle attacks.
If you accept only a single expired and known certifica...
Rbenv: How to remove a gem installed from a Github source
Normally you can list all gems of the current ruby version with gem list, which also includes the gems of you Gemfile. These can be uninstalled with gem uninstall gemname.
List and uninstall a gem installed via Bundler from Github
This d...
Bundler: How to release a gem with 2FA enabled
Rubygems supports a 2FA for your account. Once enabled you need to provide your personal OTP code for every release. Despite the CLI of the rake release task does not work well with the command prompt for your OTP code with Bundler versions `< 2...
How to use a local gem in your Gemfile
You can use local copies of gems in your Gemfile like this:
gem 'spreewald', path: '~/gems/spreewald'
As soon as you have bundled your project with the local copy of the gem, all code changes in the copy will be available on your pro...
Ruby: How to determine the absolute path relative to a file
If you want to get the path of a file relative to another, you can use the expand_path method with either the constant __FILE__ or the method __dir__. Read this card for more information about __FILE__ and __dir__.
##...
Github: How to find the Readme for a certain version of a gem
When a gem author releases a new version to Rubygems, usually a tag with the version number (e.g. v1.2.0) is created an pushed to Github, so everyone can check out or take a look at the source code at this point version release at a later time.
...