feat: convert the ruby tool to a typescript installer

[viceice]

Changes

Converts the ruby v2 shell tool, the last one, to TypeScript prepare and install services on the shared prebuild installer, and removes tools/v2/ruby.sh.

• The prebuild is always verified against its .sha512: every jammy prebuild has one, and releases without it have no jammy archive, so they never installed.
• docs/custom-registries.md: fixed the ruby sample urls (x86_64 and a release with a jammy archive) and added arm64 samples.

Context

• This closes an existing Issue, Closes: #
• This doesn't close an Issue, but I accept the risk that this PR may be closed if maintainers disagree with its opening or implementation

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Code and tests were written by Claude Opus 5.5 in Claude Code.

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Documentation (please check one with an [x])

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I have verified these changes via:

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🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Ruby installations now use prebuilt archives for x86_64 and aarch64 on supported Ubuntu releases. Downloads are verified against SHA-512 checksums.
  • Ruby and gem commands, configuration, and environment setup are available through the updated installation flow.
  • Legacy tool definitions remain available alongside newer tool versions, including when installing or upgrading tools.
• Documentation
  • Updated Ruby registry examples to version 3.4.11 and clarified that mirrors must provide both the archive and its .sha512 checksum.

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• src/cli/prepare-tool/index.spec.ts
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📝 Walkthrough

Walkthrough

Ruby preparation and installation move from a legacy shell script to CLI services. Generic services now register legacy tools, including tools with modern services. The change adds Ruby service tests, legacy-tool compatibility checks, and updated documentation.

Changes

Ruby installer migration

Layer / File(s)	Summary
Ruby preparation and cache initialization src/cli/tools/ruby/index.ts, src/cli/tools/ruby/index.spec.ts	Ruby preparation validates supported Ubuntu releases, installs packages, initializes cache configuration, and links cache directories. Tests cover supported and unsupported releases, initialization, and existing configuration.
Prebuilt installation and legacy implementation replacement src/cli/tools/ruby/index.ts, src/cli/tools/ruby/index.spec.ts, src/usr/local/containerbase/tools/v2/ruby.sh, docs/custom-registries.md, docs/new-tool.md, docs/tool-installer-best-practices.md	Ruby installation uses prebuild services, configures gem, links executables, and runs version and environment checks. Tests cover x64 and arm64 downloads, checksum responses, and Noble’s prebuild selection. The legacy Ruby script is deleted. Documentation updates Ruby archive examples, checksum requirements, and v2 directory references.

Legacy tool compatibility checks

Layer / File(s)	Summary
Generic legacy-tool service registration src/cli/install-tool/index.ts, src/cli/prepare-tool/index.ts, src/cli/prepare-tool/index.spec.ts, src/cli/utils/types.ts, src/cli/utils/v2-tool.ts, src/cli/utils/v2-tool.spec.ts	Prepare and install registration now creates generic services for every tool returned by findLegacyTools(). A test verifies that the modern Ruby service runs when a same-named v2 script exists. The known-v2-tool registry, decorator, type alias, and related tests are removed.
Custom v1 and v2 tool definitions test/latest/legacy-tools/dummy-v1.sh, test/latest/legacy-tools/v2/dummy-v2.sh	The v1 script installs and wraps a versioned executable. The v2 script defines preparation, initialization, installation, linking, and version-check functions.
Docker validation of legacy tools test/latest/Dockerfile, test/latest/Dockerfile.arm64	Docker stages check v1 and v2 installation, versions, and tool listings. They also verify that a non-root v2 upgrade preserves the v1 version and records both v2 versions.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Refactor

Merge Risk: ⚪ Minimal · up to af0dd

No actionable merge-blocking defect was established. Named Ruby operations retain modern-service precedence; duplicate-name behavior in bulk lifecycle operations remains unverified. Merge readiness remains subject to normal checks.

Security Architecture Review

Security architecture risk: 🔵 Low · up to af0dd

Modern-first dispatch and checksum-based download handling constrain the main risks. No introduced security weakness was established, but permissions, concurrent execution, and failure-recovery assumptions remain incompletely verified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The inspected operations affect container tool payloads, executable wrappers, user-home links, cache configuration, and lifecycle markers. Preparation executes with root authority. Exposure beyond those filesystem effects, including shared-cache reuse across workloads, is not established.

Security Findings and Attack Paths

• inferred — A same-named legacy script does not displace a modern service under the inspected ordered execution. Named operations select the modern service first; sequential all-tool operations persist its lifecycle marker before reaching the duplicate legacy service, whose execution guard then skips the hook. This rejects the proposed duplicate-name control bypass, but does not prove safety under concurrent processes.

Trust Boundaries and Controls

• observed — Legacy discovery derives tool names from .sh entries in the v2 tools directory. Generic adapters invoke the existing Bash lifecycle runner using argument arrays, behind lifecycle-controller guards. The directory's ownership and write permissions were not verified, so script provenance remains an environmental trust assumption.

Resilience and Maintainability Implications

• observed — Lifecycle markers are written after hook resolution, but the inspected controller uses separate asynchronous state checks, hook execution, and marker writes. No inter-process serialization was established. Marker ordering supports sequential idempotency, not a verified concurrency guarantee.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 37.50% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 7 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: converting the Ruby v2 shell tool to a TypeScript installer.

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Inline comments:
Review comments at @src/cli/install-tool/index.ts:
- Line 207: Move the generic legacy-tool prepare-service registration loop in
the install setup below the tool-specific PREPARE_TOOL_TOKEN bindings, so
RubyPrepareService is selected before the generic service for Ruby. Keep the
existing collision test.

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📒 Files selected for processing (5)

• src/cli/install-tool/index.ts
• src/cli/prepare-tool/index.ts
• src/cli/utils/types.ts
• src/cli/utils/v2-tool.spec.ts
• src/cli/utils/v2-tool.ts

💤 Files with no reviewable changes (3)

• src/cli/utils/v2-tool.spec.ts
• src/cli/utils/types.ts
• src/cli/utils/v2-tool.ts

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Copilot review overview

🟢 Approval recommended

The migration preserves Ruby behavior, adds checksum verification and comprehensive tests, and maintains custom legacy-tool coverage.

Review effort: Balanced
Findings: None

What changed in this PR

Converts Ruby’s legacy shell installer to typed prepare/install services while preserving legacy custom-tool compatibility.

Changes:

• Adds Ruby preparation, verified prebuild installation, linking, and tests.
• Removes the final bundled v2 shell installer infrastructure.
• Adds legacy-tool container coverage and updates registry documentation.

File	Description
test/​latest/​legacy-tools/​v2/​dummy-v2.sh	Adds a v2 compatibility fixture.
test/​latest/​legacy-tools/​dummy-v1.sh	Adds a v1 compatibility fixture.
test/​latest/​Dockerfile.arm64	Tests legacy tools on arm64.
test/​latest/​Dockerfile	Tests legacy tools on amd64.
src/​usr/​local/​containerbase/​tools/​v2/​ruby.sh	Removes the Ruby shell installer.
src/​cli/​utils/​v2-tool.ts	Removes obsolete v2 registration utilities.
src/​cli/​utils/​v2-tool.spec.ts	Removes obsolete utility tests.
src/​cli/​utils/​types.ts	Removes the unused decorator type.
src/​cli/​tools/​ruby/​index.ts	Implements Ruby prepare/install services.
src/​cli/​tools/​ruby/​index.spec.ts	Tests Ruby installation behavior.
src/​cli/​prepare-tool/​index.ts	Registers Ruby preparation directly.
src/​cli/​install-tool/​index.ts	Registers Ruby installation directly.
docs/​tool-installer-best-practices.md	Updates legacy installer guidance.
docs/​new-tool.md	Updates legacy-tool documentation.
docs/​custom-registries.md	Corrects Ruby archive examples and checksum requirements.

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