Create a gem project

To create a new gem skeleton, use Bundler’s gem command:

bundle gem my_gem
cd my_gem

This generates a my_gem.gemspec file. Fill in the required metadata before building:

Gem::Specification.new do |spec|
  spec.name    = "my_gem"
  spec.version = "1.0.0"
  spec.authors = ["Your Name"]
  spec.email   = ["[email protected]"]
  spec.summary = "A sample gem published to Repsy."
  spec.files   = Dir["lib/**/*", "README.md"]
end

Build the .gem archive:

gem build my_gem.gemspec

This produces my_gem-1.0.0.gem in the current directory.

Store credentials

Gem push credentials are kept in ~/.gem/credentials. Repsy expects a Basic auth value (Base64-encoded username:password). Run the following command — replace <username> and <password-or-token> with your actual values:

echo ":repsy: Basic $(echo -n '<username>:<password-or-token>' | base64)" \
  >> ~/.gem/credentials
chmod 0600 ~/.gem/credentials

The echo -n flag suppresses the trailing newline so the base64 encoding is correct. After running the command, ~/.gem/credentials will contain a line like:

---
:repsy: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

Tip: For CI/CD pipelines, use a Deploy Token instead of your account password.

Push the gem

Use gem push with the --host flag pointing to your Repsy repository and --key matching the credential entry you added above:

gem push my_gem-1.0.0.gem \
  --host https://repo.repsy.io/<username>/<repo-name> \
  --key repsy

Replace <username> and <repo-name> with your actual values.

Congratulations, you have published a gem to your Repsy repository! You can now install it in any Ruby project.

Yank a gem version

If you need to remove a specific version from your repository, use gem yank:

gem yank my_gem -v 1.0.0 \
  --host https://repo.repsy.io/<username>/<repo-name> \
  --key repsy

A pre-release version is yanked the same way: gem yank has no separate option for it, so give the full version number, for example -v 1.0.0.pre.

Note: Yanking a version permanently removes it from the index. Yanked versions cannot be downloaded and cannot be re-published under the same version number.