semantic-release-rubygem

semantic-release plugin for publishing Ruby gems.

Step	Description
verifyConditions	Locate and validate a .gemspec file, locate and validate a lib/**/version.rb file, verify the presence of the GEM_HOST_API_KEY environment variable, and create a credentials file with the API key.
prepare	Update the version in the lib/**/version.rb version file and build the gem.
publish	Push the gem to the gem server.

Install

$ npm install semantic-release-rubygem -D

Usage

Add the plugin to the semantic-release configuration file:

{
  "plugins": [
    "@semantic-release/commit-analyzer",
    "@semantic-release/release-notes-generator",
    "semantic-release-rubygem",
  ]
}

Configuration

Gem server authentication

The gem server authentication configuration is required.

The API key must be set using the GEM_HOST_API_KEY environment variable. To retrieve the key, you can:

1. Login to RubyGems.org and click on 'Edit Profile'. You'll find the key in the 'API Access' section of the page.
2. Sign into your gem host using the gem signin command. After you enter your credentials, your API key will be stored as a YAML value in the ~/.gem/credentials file under the rubygems_api_key key (or the hostname of your gem server).

gemspec file

This plugin requires exactly one valid .gemspec file to be present in the CWD.

lib/**/version.rb file

This plugin requires the version of the published gem to be defined in a version.rb file somewhere in the lib folder (e.g. lib/my/gem/version.rb). The version itself must be defined as a constant named VERSION inside the file:

module My
  module Gem
    VERSION = '0.0.0'
  end
end

Options

Options	Description	Default
gemHost	The gem server to push the gem to.	'https//rubygems.org'
updateGemfileLock	Whether to update the version of the gem to publish in the Gemfile.lock. This is useful if you are using the @semantic-release/git plugin to keep the version up to date in your git repo. When set to true the plugin will run bundle install to update the version. If another command is desired, it can be set by passing a string (e.g. bundle appraisal install).	false
gemPublish	Whether to publish your gem to the gem server.	true
gemFileDir	Directory path in which to write the the built .gem file. If false, the .gem file will not be kept on the file system.	false