Modernize rain.cli: rainix bump, drop submodule, DCL + REUSE, rainix reusables, Cachix publish

[thedavidmeister]

Summary

End-to-end modernization of rain.cli, in three commits:

1. a64ce65 Bump rainix to latest (998bd91d -> ae2b77d2) — pulls in the reusables, slim shells, and the new build-meta.sh hook.
2. a64fb64 Drop rain.metadata submodule; switch to published crate; DCL + REUSE:
   • rain-metadata 0.1.1 from crates.io (was a path dep fed by a fetchgit + buildPhase copy into ./lib/rain.metadata).
   • tokio 1.x (pinning 1.28.0 broke transitive tokio-stream 0.1.18, which needs Receiver::capacity/max_capacity added in 1.41).
   • await the now-async rain_metadata::cli::dispatch.
   • flake.nix loses the fetchgit + buildPhase staging; buildRustPackage handles the rust build cleanly. inherit cleanup. Drop unused self.
   • License: CAL-1.0 -> LicenseRef-DCL-1.0 via license-file = "LICENSE" with LICENSE -> LICENSES/LicenseRef-DCL-1.0.txt symlink; REUSE.toml covers tracked files; reuse lint passes (11/11).
   • gitignore the git-hooks.nix-generated .pre-commit-config.yaml.
3. 2c88098 Modernize CI: rainix reusables + Cachix-publish nix-build:
   • rs-test / rs-static / legal / package-release: thin wrappers over the rainix reusables (rainix-rs-test, rainix-rs-static, rainix-sol-legal, rainix-autopublish). package-release passes crate=rain_cli + level=alpha.
   • nix-build: builds .#rain and wires cachix-action to push to the rainlanguage cache, so downstream nix shell github:rainlanguage/rain.cli hits cache instead of recompiling.
   • Drops the legacy test-build.yaml + manual-rs-release.yml.

Test plan

• All CI checks green (rs-test, rs-static, legal, nix-build, package-release no-op until merged).
• After merge, confirm the rain derivation lands in cachix.org/rainlanguage and a downstream nix shell github:rainlanguage/rain.cli resolves from cache.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added automated CI/CD workflows for continuous build and package releases

• Chores

  • Removed legacy manual release workflow
  • Simplified build configuration and dependencies
  • Updated project licensing with REUSE compliance framework

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

Walkthrough

This PR modernizes the project's CI/CD infrastructure, simplifies the Nix build configuration, updates dependencies, and establishes licensing compliance. The changes migrate GitHub Actions workflows to rainix reusable templates, remove custom metadata handling from the flake, convert rain-metadata to a published crate, add DecentraLicense compliance metadata, and fix source code to support async dispatch.

Changes

Build and Licensing Modernization

Layer / File(s)	Summary
CI/CD Workflow Migration to Rainix .github/workflows/legal.yaml, .github/workflows/nix-build.yaml, .github/workflows/package-release.yaml, .github/workflows/rs-static.yaml, .github/workflows/rs-test.yaml	Five new workflows delegate execution to rainix reusable templates for legal checks, Nix builds with Cachix caching, crate publishing to crates.io, static checks, and test runs.
Nix Flake Simplification flake.nix	Removed self from outputs, deleted custom rain-metadata-repo and build-cargo-lock packages, simplified packages.rain build with narrowed inputs, and wired devShells.default via inheritance from rainix defaults.
Dependency Updates and Code Fixes Cargo.toml, src/main.rs	Cargo.toml relaxes tokio constraint to 1, switches rain-metadata from path to published crate 0.1.1, adds license-file metadata; src/main.rs fixes imports and adds .await to async metadata dispatch call.
License and Compliance Setup LICENSE, LICENSES/LicenseRef-DCL-1.0.txt, REUSE.toml, .gitignore	LICENSE symlinked to DecentraLicense 1.0 text, REUSE.toml configured with SPDX metadata for repository and source files, .gitignore extended to exclude pre-commit config.
Documentation Formatting README.md	Nix flakes installation instructions and bash alias guidance reflowed across multiple lines for readability; code fence marker adjusted.

🎯 3 (Moderate) | ⏱️ ~25 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly summarizes the main changes: rainix version bump, removal of submodule, addition of DCL/REUSE licensing, use of rainix reusable workflows, and Cachix publishing integration.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 2026-05-30-update-rainix

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