🔮 Kettle::Drift

if ci_badges.map(&:color).detect { it != "green"} ☝️ let me know, as I may have missed the discord notification.

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👣 How will this project approach the September 2025 hostile takeover of RubyGems? 🚑️

I've summarized my thoughts in [this blog post](https://dev.to/galtzo/hostile-takeover-of-rubygems-my-thoughts-5hlo).

🌻 Synopsis

kettle-drift tracks repeated adjacent-line chunks that usually signal template drift or copy/paste corruption. When it is injected into a project by the kettle-jem plugin, the rake tasks default to the kettle-jem template surface and baseline, so they validate only template-managed files instead of the whole repository.

💡 Info you can shake a stick at

Tokens to Remember
Works with JRuby
Works with Truffle Ruby
Works with MRI Ruby 4
Works with MRI Ruby 3
Support & Community
Source
Documentation
Compliance
Style
Maintainer 🎖️
`...` 💖	🧊 🐙 🛖 🧪

Compatibility

Compatible with MRI Ruby 3.2.0+, and concordant releases of JRuby, and TruffleRuby.

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Find this repo on federated forges (Coming soon!)

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Enterprise Support

Available as part of the Tidelift Subscription.

Need enterprise-level guarantees?

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📊`@`Pointy Haired Boss: An [enterprise support][🏙️entsup-tidelift] subscription is "[never gonna let you down][🧮kloc]", and *supports* open source maintainers Alternatively: - [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite] - [![Get help from me on Upwork][👨🏼‍🏫expsup-upwork-img]][👨🏼‍🏫expsup-upwork] - [![Get help from me on Codementor][👨🏼‍🏫expsup-codementor-img]][👨🏼‍🏫expsup-codementor]

✨ Installation

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

bundle add kettle-drift

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

gem install kettle-drift

⚙️ Configuration

The injected rake tasks and the standalone CLI expose the same three operating modes, but they differ in default scan scope:

Entry point	Scope default	Mode	Writes lockfile?	Fails when
`bin/rake kettle:drift`	Template-managed files via `kettle-jem` when available	`update`	Yes, unless new untracked drift appeared	any new untracked drift appeared
`bin/rake kettle:drift:update`	Template-managed files via `kettle-jem` when available	`update`	Yes, unless new untracked drift appeared	any new untracked drift appeared
`bin/rake kettle:drift:check`	Template-managed files via `kettle-jem` when available	`check`	No	any lockfile difference
`bin/rake kettle:drift:force_update`	Template-managed files via `kettle-jem` when available	`force-update`	Yes	never, for drift-state reasons
`kettle-drift --update`	Whole repo target set unless `--template-dir=PATH` is passed	`update`	Yes, unless new untracked drift appeared	any new untracked drift appeared
`kettle-drift --check`	Whole repo target set unless `--template-dir=PATH` is passed	`check`	No	any lockfile difference except the already-clean `complete` case
`kettle-drift --force-update`	Whole repo target set unless `--template-dir=PATH` is passed	`force-update`	Yes	never, for drift-state reasons

Behavior notes:

Term	Meaning
`acknowledged drift`	Drift already recorded in the lockfile
`new untracked drift`	Drift present in the current scan but not yet recorded in the lockfile
`update` mode	Writes the current results when establishing the first baseline, when acknowledged drift was reduced, or when drift is gone entirely; fails instead of writing whenever new untracked drift appeared
`check` mode	Never writes; fails whenever current results differ from the lockfile, except for the already-clean `complete`-with-no-lock case
`force-update` mode	Always writes the current results (or deletes the lockfile for `complete`) and does not fail just because new untracked drift appeared

🔧 Basic Usage

For kettle-jem-managed repos, prefer the injected rake tasks:

bin/rake kettle:drift
bin/rake kettle:drift:update
bin/rake kettle:drift:check
bin/rake kettle:drift:force_update

Use the standalone CLI when you intentionally want a broader or explicitly configured scan:

kettle-drift
kettle-drift --update
kettle-drift --check
kettle-drift --force-update
kettle-drift --template-dir=template

🔐 Security

See SECURITY.md.

🤝 Contributing

If you need some ideas of where to help, you could work on adding more code coverage, or if it is already 💯 (see below) check issues or PRs, or use the gem and think about how it could be better.

We so if you make changes, remember to update it.

See CONTRIBUTING.md for more detailed instructions.

🚀 Release Instructions

See CONTRIBUTING.md.

Code Coverage

Coverage service badges

[![Coverage Graph][🏀codecov-g]][🏀codecov] [![Coveralls Test Coverage][🏀coveralls-img]][🏀coveralls] [![QLTY Test Coverage][🏀qlty-covi]][🏀qlty-cov]

🪇 Code of Conduct

Everyone interacting with this project's codebases, issue trackers, chat rooms and mailing lists agrees to follow the .

🌈 Contributors

Made with contributors-img.

Also see GitLab Contributors: https://gitlab.com/kettle-rb/kettle-drift/-/graphs/main

⭐️ Star History

📌 Versioning

This library follows for its public API where practical. For most applications, prefer the Pessimistic Version Constraint with two digits of precision.

For example:

spec.add_dependency("kettle-drift", "~> 1.0")

📌 Is "Platform Support" part of the public API? More details inside.

Dropping support for a platform can be a breaking change for affected users. If a release changes supported platforms, it should be called out clearly in the changelog and versioned with that impact in mind. To get a better understanding of how SemVer is intended to work over a project's lifetime, read this article from the creator of SemVer: - ["Major Version Numbers are Not Sacred"][📌major-versions-not-sacred]

See CHANGELOG.md for a list of releases.

📄 License

The gem is available under the following license: AGPL-3.0-only. See LICENSE.md for details.

If none of the available licenses suit your use case, please contact us to discuss a custom commercial license.

© Copyright

See LICENSE.md for the official copyright notice.

🤑 A request for help

Maintainers have teeth and need to pay their dentists. After getting laid off in an RIF in March, and encountering difficulty finding a new one, I began spending most of my time building open source tools. I'm hoping to be able to pay for my kids' health insurance this month, so if you value the work I am doing, I need your support. Please consider sponsoring me or the project.

To join the community or get help 👇️ Join the Discord.

To say "thanks!" ☝️ Join the Discord or 👇️ send money.

💌 💌 💌

Please give the project a star ⭐ ♥.

Thanks for RTFM. ☺️

Field	Value
Package	kettle-drift
Description	🔮 Kettle::Drift tracks repeated adjacent-line chunks that usually signal template drift or copy/paste corruption.
Homepage	https://github.com/kettle-rb/kettle-drift
Source	https://github.com/kettle-rb/kettle-drift/tree/v1.0.0
License	`AGPL-3.0-only`
Funding	https://github.com/sponsors/pboling, https://issuehunt.io/u/pboling, https://ko-fi.com/pboling, https://liberapay.com/pboling/donate, https://opencollective.com/kettle-rb, https://patreon.com/galtzo, https://polar.sh/pboling, https://thanks.dev/u/gh/pboling, https://tidelift.com/funding/github/rubygems/kettle-drift, https://www.buymeacoffee.com/pboling