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

if ci_badges.map(&:color).all? { it == "green"} 👇️ send money so I can do more of this. FLOSS maintenance is now my full-time job.

ast-template applies StructuredMerge templates to package directories. It plans template entries, runs package-directory sessions, preserves destination-owned README sections, and reports convergence without requiring callers to wire the lower-level merge primitives by hand.

• Template tree planning and application.
• Package-directory session requests and reports.
• README section replacement through structured Markdown owners.
• Adapter-family registry checks for template applicability.
• Dry-run and apply workflows for repeatable template updates.

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

Compatible with MRI Ruby 4.0.0+, and concordant releases of JRuby, and TruffleRuby. CI workflows and Appraisals are generated for MRI Ruby 4.0.0+. This test floor is configured by ruby.test_minimum in .kettle-jem.yml and may be higher than the gem's runtime compatibility floor when legacy Rubies are not practical for the current toolchain.

The amazing test matrix is powered by the kettle-dev stack.

How kettle-dev manages complexity in tests

Gem	Source	Role	Daily download rank
appraisal2	GitHub	multi-dependency Appraisal matrix generation
appraisal2-rubocop	GitHub	RuboCop Appraisal generator integration
kettle-dev	GitHub	development, release, and CI workflow tooling
kettle-jem	GitHub	Appraisals & CI workflow templates
kettle-soup-cover	GitHub	SimpleCov coverage policy and reporting
kettle-test	GitHub	standard test runner and coverage harness
rubocop-lts	GitHub	Ruby-version-aware linting
turbo_tests2	GitHub	parallel test execution

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

bundle add ast-template

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

gem install ast-template

Configure ast-template with a template root, a destination root, and optional session options that control dry-run behavior, adapter selection, and report detail.

Template-specific package facts are normally supplied by the caller that owns the package metadata. For Ruby gems, kettle-jem is that caller.

require "ast/template"

request = Ast::Template.package_directory_session_request(
  template_root: "template",
  destination_root: ".",
  mode: "plan",
)

report = Ast::Template.run_package_directory_session(request)
puts report.fetch(:mode)

See SECURITY.md.

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.

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("ast-template", "~> 7.0")

See CHANGELOG.md for a list of releases.

The gem is available under the following licenses: AGPL-3.0-only, PolyForm-Small-Business-1.0.0. See LICENSE.md for details.

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