refactor(tree-walker): re-abstract tree loading

[fraxken]

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🦋 Changeset detected

Latest commit: 0e844a4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@nodesecure/tree-walker	Minor

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[Copilot]

Pull request overview

This PR refactors tree loading logic by introducing a TreeDependencies class to encapsulate dependency filtering and transformation. The main change abstracts the complexity of filtering Arborist nodes based on dev dependencies and workspace settings away from the walker implementation.

• Introduces TreeDependencies class to handle dependency filtering from Arborist nodes
• Updates LocalDependencyTreeLoader to return TreeDependencies instead of raw Arborist.Node
• Adds comprehensive tests for LocalDependencyTreeLoader

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
workspaces/tree-walker/src/npm/TreeDependencies.ts	New class that encapsulates logic for filtering and transforming Arborist node edges into a Map of dependencies
workspaces/tree-walker/src/npm/LocalDependencyTreeLoader.ts	Updated to return TreeDependencies instead of Arborist.Node, with options now bundled into a single object
workspaces/tree-walker/src/npm/walker.ts	Refactored to use TreeDependencies API, simplifying the dependency iteration logic
workspaces/tree-walker/test/npm/LocalDependencyTreeLoader.spec.ts	New test file covering both virtual and actual tree loading scenarios
workspaces/tree-walker/test/fixtures/tree-loader-virtual/package.json	Test fixture for tree loading tests
workspaces/tree-walker/test/fixtures/tree-loader-virtual/package-lock.json	Lock file fixture for virtual tree loading test
.changeset/yummy-knives-grab.md	Changeset documenting this as a minor version change

Files not reviewed (1)

• workspaces/tree-walker/test/fixtures/tree-loader-virtual/package-lock.json: Language not supported

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