VersionGem

Alternatives

This gem has a very niche purpose, which is:

providing introspection of a Version module based on a Version::VERSION constant string,
while not interfering with gemspec parsing where the VERSION string is traditionally used.

If this isn't precisely your use case you may be better off looking at versionaire, a wonderful, performant, well-maintained, gem from the Alchemists, or version_sorter from GitHub.

For more discussion about this see issue #2

Still here?

Give your next library an introspectable Version module without breaking your Gemspec.

MyLib::Version.to_s # => "1.2.3.rc3"
MyLib::Version.major # => 1
MyLib::Version.minor # => 2
MyLib::Version.patch # => 3
MyLib::Version.pre # => "rc3"
MyLib::Version.to_a # => [1, 2, 3, "rc3"]
MyLib::Version.to_h # => { major: 1, minor: 2, patch: 3, pre: "rc3" }

This library was extracted from the gem oauth2.

This gem has no runtime dependencies.

	Project	bundle add version_gem
1️⃣	name, license, docs, standards
2️⃣	version & activity	<!--[![Next Version][📗next-img]][📗next]-->
3️⃣	maintanence & linting
4️⃣	testing	<!-- -->
5️⃣	coverage & security
6️⃣	resources
7️⃣	spread 💖	🌏 👼 💻

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add version_gem

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install version_gem

Usage

In the standard bundle gem my_lib code you get the following in lib/my_lib/version.rb:

module MyLib
  VERSION = "0.1.0"
end

Change it to a nested Version namespace (the one implied by the path => namespace convention):

module MyLib
  module Version
    VERSION = "0.1.0"
  end
end

Now add the following near the top of the file the manages requiring external libraries. Using the same example of bundle gem my_lib, this would be lib/my_lib.rb.

require "version_gem"

Then, add the following wherever you want in the same file (recommend the bottom).

MyLib::Version.class_eval do
  extend VersionGem::Basic
end

And now you have some version introspection methods available:

MyLib::Version.to_s # => "0.1.0"
MyLib::Version.major # => 0
MyLib::Version.minor # => 1
MyLib::Version.patch # => 0
MyLib::Version.pre # => ""
MyLib::Version.to_a # => [0, 1, 0]
MyLib::Version.to_h # => { major: 0, minor: 1, patch: 0, pre: "" }

Side benefit

Your version.rb file now abides the Ruby convention of directory / path matching the namespace / class!

Query Ruby Version (as of version 1.2.0)

In Continuous Integration environments for libraries that run against many versions of Ruby, I often need to configure things discretely per Ruby version, and doing so forced me to repeat a significant amount of boilerplate code across each project.

Thus VersionGem::Ruby was born. It has the two optimized methods I always need:

engine = 'ruby'
version = "2.7.7"
gte_minimum_version?(version, engine)  # Is the current version of Ruby greater than or equal to some minimum?

major = 3
minor = 2
actual_minor_version?(major, minor, engine) # Is the current version of Ruby precisely a specific minor version of Ruby?

Version::Ruby is not loaded by default. If you want to use it, you must require it as:

require "version_gem/ruby"

Normally I do this in my spec/spec_helper.rb, and/or .simplecov files. Occasionally in my Rakefile.

Caveat

This design keeps your version.rb file compatible with the way gemspec files use them. This means that the introspection is not available within the gemspec. The enhancement from this gem is only available at runtime.

RSpec Matchers

In spec_helper.rb:

require 'version_gem/rspec'

Then you can write a test like:

RSpec.describe MyLib::Version do
  it_behaves_like 'a Version module', described_class
end

# Or, if you want to write your own, here is the a la carte menu:
RSpec.describe MyLib::Version do
  it "is a Version module" do
    expect(described_class).is_a?(Module)
    expect(described_class).to have_version_constant
    expect(described_class).to have_version_as_string
    expect(described_class.to_s).to be_a(String)
    expect(described_class).to have_major_as_integer
    expect(described_class).to have_minor_as_integer
    expect(described_class).to have_patch_as_integer
    expect(described_class).to have_pre_as_nil_or_string
    expect(described_class.to_h.keys).to match_array(%i[major minor patch pre])
    expect(described_class.to_a).to be_a(Array)
  end
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

See CONTRIBUTING.md

Contributors

Made with contributors-img.

License

The gem is available as open source under the terms of the MIT License . See LICENSE for the official Copyright Notice.

Code of Conduct

Everyone interacting in the VersionGem project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

Versioning

This library aims to adhere to Semantic Versioning 2.0.0. Violations of this scheme should be reported as bugs. Specifically, if a minor or patch version is released that breaks backward compatibility, a new version should be immediately released that restores compatibility. Breaking changes to the public API will only be introduced with new major versions.

As a result of this policy, you can (and should) specify a dependency on this gem using the Pessimistic Version Constraint with two digits of precision.

For example:

spec.add_dependency "version_gem", "~> 1.1"

Security

See SECURITY.md.