feat: add Rust language support with cognitive complexity analysis

[askpt]

• Add RustMetricsAnalyzer using tree-sitter-rust@0.21.0
• Register 'rust' language in MetricsAnalyzerFactory
• Add onLanguage:rust activation event in package.json
• Add 11 unit tests for Rust analyzer (79→90 passing)
• Add samples/Test.rs for manual extension testing

Supports: fn items, impl methods (qualified as Type::method), if/for/while/loop/match expressions, logical && and || operators, closures (when nested), and labeled break/continue.

Closes #315

[askpt]

@copilot resolve the merge conflicts in this pull request

[Copilot]

Pull request overview

Adds Rust language support to the VS Code “code-metrics” extension by introducing a new Tree-sitter-based Rust cognitive complexity analyzer, wiring it into the analyzer factory, and updating the extension manifest and tests so Rust files can be analyzed and displayed via CodeLens.

Changes:

• Added RustMetricsAnalyzer (Tree-sitter Rust) and registered the rust language ID in MetricsAnalyzerFactory.
• Updated extension manifest to activate on Rust files and added tree-sitter-rust dependency.
• Added Rust-focused unit tests and a samples/Test.rs file for manual verification.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/metricsAnalyzer/languages/rustAnalyzer.ts	New Rust cognitive complexity analyzer implementation.
src/metricsAnalyzer/metricsAnalyzerFactory.ts	Registers Rust analyzer under the rust language ID.
src/unit/unit.test.ts	Adds Rust analyzer unit tests and updates supported-language expectations.
package.json	Adds Rust activation event/keyword and tree-sitter-rust dependency.
package-lock.json	Locks the new tree-sitter-rust package (but currently with a specifier mismatch).
samples/Test.rs	Adds a Rust sample file to exercise analyzer behavior manually.

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved and pushed in commit 0fd4115. I merged origin/main into this PR branch and fixed the conflict in src/unit/unit.test.ts by keeping both the Rust analyzer tests and the latest Go analyzer coverage tests.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• update.code.visualstudio.com
  • Triggering command: /opt/hostedtoolcache/node/22.22.2/x64/bin/node node /home/REDACTED/work/code-metrics/code-metrics/node_modules/.bin/vscode-test (dns block)

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• update.code.visualstudio.com
  • Triggering command: /opt/hostedtoolcache/node/22.22.2/x64/bin/node node /home/REDACTED/work/code-metrics/code-metrics/node_modules/.bin/vscode-test (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[askpt]

@copilot Make sure the READMEs are updated and the tests that are added run in the CI

[Copilot]

@copilot Make sure the READMEs are updated and the tests that are added run in the CI

Addressed in commit 3bb2e5d. README now includes Rust in supported languages, and CI now runs npm run test:unit on non-Linux matrix jobs so the added tests execute in CI across all OS jobs.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• update.code.visualstudio.com
  • Triggering command: /opt/hostedtoolcache/node/22.22.2/x64/bin/node node /home/REDACTED/work/code-metrics/code-metrics/node_modules/.bin/vscode-test (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[codecov]

Codecov Report

❌ Patch coverage is 96.63677% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.23%. Comparing base (a850de1) to head (a921351).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/metricsAnalyzer/languages/rustAnalyzer.ts	96.62%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #327      +/-   ##
==========================================
+ Coverage   73.66%   76.23%   +2.57%     
==========================================
  Files          12       13       +1     
  Lines        3535     3981     +446     
  Branches      364      428      +64     
==========================================
+ Hits         2604     3035     +431     
- Misses        929      944      +15     
  Partials        2        2              

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.