fix(bitbake): resolve layer misidentification with deepest match

[bd-spratikbharti]

Description

Summary

• Fixes BitBake layer misidentification when recipe paths include directory names that match known layer names (e.g., wrlinux).
• Uses deepest path match (lastIndexOf) instead of first (indexOf) to identify the correct layer.
• Validates parsed layer against bitbake-layers show-recipes output before accepting.
• Resolves empty BOM issue caused by failed layer validation.

Details

When recipe paths contained directories whose names matched known layer names, the detector previously matched the first occurrence instead of the actual layer directory.

Example

Path: /wrlinux/layers/meta/recipes/zlib.bb

• Before: matched wrlinux (parent directory) → failed validation → BOM empty
• After: matched meta (actual layer) → validation passes → BOM populated

Layer Identification Process

1. Parse the layer name from the recipe path using the deepest match.
2. Validate the parsed layer against bitbake-layers show-recipes (authoritative source).
3. If validation passes, use the parsed layer; otherwise fall back to the first layer from show-recipes.

Impact

• Ensures correct layer identification.
• Prevents dropped components.
• Maintains BOM accuracy for downstream analysis.

[Copilot]

Pull request overview

This PR fixes Yocto/BitBake layer identification when recipe paths contain parent directories that collide with known layer names, ensuring the detector selects the correct (deepest) layer and avoids dropping components into an empty BOM.

Changes:

• Update GraphNodeLabelParser to select the deepest (rightmost) matching layer path segment via lastIndexOf.
• Validate the path-parsed layer against bitbake-layers show-recipes results in BitbakeDependencyGraphTransformer, falling back to the authoritative layer when invalid.
• Expand GraphNodeLabelParserTest with multiple collision/determinism scenarios.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
detectable/src/main/java/com/blackduck/integration/detectable/detectables/bitbake/parse/GraphNodeLabelParser.java	Switches layer matching to deepest/rightmost path match to avoid parent-folder collisions.
detectable/src/main/java/com/blackduck/integration/detectable/detectables/bitbake/transform/BitbakeDependencyGraphTransformer.java	Validates parsed layer against show-recipes output and falls back when invalid.
detectable/src/test/java/com/blackduck/integration/detectable/detectables/bitbake/unit/GraphNodeLabelParserTest.java	Adds unit tests for collision cases and deterministic parsing behavior.

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