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Configuring RubyGems for use with GitHub Packages

You can configure RubyGems to publish a package to GitHub Packages and to use packages stored on GitHub Packages as dependencies in a Ruby project with Bundler.

GitHub Packages is available with GitHub Free, GitHub Pro, GitHub Free for organizations, GitHub Team, GitHub Enterprise Cloud, GitHub Enterprise Server 2.22, and GitHub One.


GitHub Packagesは、レガシーのリポジトリごとのプランを使っているアカウントが所有しているプライベートリポジトリでは利用できません。 GitHub PackagesはGitHub Free、GitHub Pro、GitHub FreeのOrganization、GitHub Team、GitHub Enterprise Cloud、GitHub Oneで利用できます。 For more information, see "[GitHub's products](/articles/github-s-products)."

ここには以下の内容があります:

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Prerequisites

  • You must have rubygems 2.4.1 or higher. To find your rubygems version:

    $ gem --version
    • You must have bundler 1.6.4 or higher. To find your Bundler version:

      $ bundle --version
      Bundler version 1.13.7
    • Install keycutter to manage multiple credentials. To install keycutter:

      $ gem install keycutter

Authenticating to GitHub Packages

GitHub Packagesでパッケージを公開、インストール、削除するにはアクセストークンが必要です。 GitHub Packagesに直接、あるいはGitHub APIでユーザ名で認証を受けるのに、個人のアクセストークンが利用できます。 個人トークンを作成する際には、必要に応じて様々なスコープをトークンに割り当てできます。

To authenticate using a GitHub Actionsのワークフロー:

  • For package registries (PACKAGE-REGISTRY.pkg.github.com/OWNER/REPOSITORY/IMAGE-NAME), you can use a GITHUB_TOKEN.
  • For the container registry (ghcr.io/OWNER/IMAGE-NAME), you must use a personal access token.

Authenticating with a personal access token

GitHub Packages内でパッケージを公開及びインストールするためには、適切なスコープで個人アクセストークンを使わなければなりません。 詳しい情報については「GitHub Packagesについて」を参照してください。

You can authenticate to GitHub Packages with RubyGems by editing the ~/.gem/credentials file for publishing gems, editing the ~/.gemrc file for installing a single gem, or using Bundler for tracking and installing one or more gems.

To publish new gems, you need to authenticate to GitHub Packages with RubyGems by editing your ~/.gem/credentials file to include your personal access token. Create a new ~/.gem/credentials file if this file doesn't exist.

For example, you would create or edit a ~/.gem/credentials to include the following, replacing TOKEN with your personal access token.

---
:github: Bearer TOKEN

To install gems, you need to authenticate to GitHub Packages by editing the ~/.gemrc file for your project to include https://USERNAME:TOKEN@rubygems.pkg.github.com/OWNER/. You must replace:

  • USERNAME with your GitHub username.
  • TOKEN with your personal access token.
  • OWNER with the name of the user or organization account that owns the repository containing your project.

If you don't have a ~/.gemrc file, create a new ~/.gemrc file using this example.

---
:backtrace: false
:bulk_threshold: 1000
:sources:
- https://rubygems.org/
- https://USERNAME:TOKEN@rubygems.pkg.github.com/OWNER/
:update_sources: true
:verbose: true  

To authenticate with Bundler, configure Bundler to use your personal access token, replacing USERNAME with your GitHub username, TOKEN with your personal access token, and OWNER with the name of the user or organization account that owns the repository containing your project.

大文字はサポートされていないため、仮にGitHubのユーザあるいはOrganization名が大文字を含んでいても、リポジトリオーナーには小文字を使わなければなりません。

$ bundle config https://rubygems.pkg.github.com/OWNER USERNAME:TOKEN

Authenticating with the GITHUB_TOKEN

GitHub Actionsワークフローを使っているなら、GITHUB_TOKENを使い、個人アクセストークンを保存したり管理したりする必要なくGitHub Packages内のパッケージの公開や利用ができます。 詳しい情報については「GITHUB_TOKENでの認証」を参照してください。

Publishing a package

デフォルトでは、GitHubはパッケージはそのままの名前で既存のリポジトリに公開されます。 For example, when you publish octo-gem to the octo-org organization, GitHub Packages publishes the gem to the octo-org/octo-gem repository. For more information on creating your gem, see "Make your own gem" in the RubyGems documentation.

パッケージを公開した後は、GitHub上でそのパッケージを見ることができます。 詳しい情報については「パッケージの表示」を参照してください。

  1. GitHub Packagesに認証を受けてください。 詳しい情報については「GitHub Packagesへの認証を行う」を参照してください。

  2. Build the package from the gemspec to create the .gem package.

    gem build OCTO-GEM.gemspec
  3. Publish a package to GitHub Packages, replacing OWNER with the name of the user or organization account that owns the repository containing your project and OCTO-GEM with the name of your gem package.

    $ gem push --key github \
    --host https://rubygems.pkg.github.com/OWNER \
    OCTO-GEM-0.0.1.gem

Publishing multiple packages to the same repository

To publish multiple gems to the same repository, you can include the URL to the GitHub repository in the github_repo field in gem.metadata. If you include this field, GitHub matches the repository based on this value, instead of using the gem name.

gem.metadata = { "github_repo" => "ssh://github.com/OWNER/REPOSITORY" }

Installing a package

You can use gems from GitHub Packages much like you use gems from rubygems.org. You need to authenticate to GitHub Packages by adding your GitHub user or organization as a source in the ~/.gemrc file or by using Bundler and editing you Gemfile.

  1. GitHub Packagesに認証を受けてください。 詳しい情報については「GitHub Packagesへの認証を行う」を参照してください。

  2. For Bundler, add your GitHub user or organization as a source in your Gemfile to fetch gems from this new source. For example, you can add a new source block to your Gemfile that uses GitHub Packages only for the packages you specify, replacing GEM NAME with the package you want to install from GitHub Packages and OWNER with the user or organization that owns the repository containing the gem you want to install.

    source "https://rubygems.org"
    
    gem "rails"
    
    source "https://rubygems.pkg.github.com/OWNER" do
      gem "GEM NAME"
    end
    
  3. For Bundler versions earlier than 1.7.0, you need to add a new global source. For more information on using Bundler, see the bundler.io documentation.

    source "https://rubygems.pkg.github.com/OWNER"
    source "https://rubygems.org"
    
    gem "rails"
    gem "GEM NAME"
    
  4. Install the package:

    $ gem install octo-gem --version "0.1.1"

Further reading

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