Fix get_advisory_url to handle string file paths

[mr-raj12]

Summary

• Fix get_advisory_url() in utils.py to accept both Path objects and strings
• Converts string inputs to Path objects before calling .relative_to()
• Resolves the AttributeError: 'str' object has no attribute 'relative_to' error

Issue

Fixes :

• Istio importer fails #2016

Changes

• Added from pathlib import Path import
• Added type checking with isinstance() to convert strings to Path objects

Testing

• All 96 v2 importer tests pass
• All 7 utils tests pass
• Manually tested with both Path and string inputs

Signed-off-by: Mrityunjay Raj mr.raj.earth@gmail.com

[ziadhany]

@mr-raj12, could you please add a simple test for the get_advisory_url function?

[mr-raj12]

@ziadhany Test added for get_advisory_url() function as requested.

The test covers:

• String inputs (the bug fix scenario that caused the original issue)
• Path object inputs (original working case)
• Mixed Path/string inputs

All tests pass locally. The PR is ready for review.

[mr-raj12]

@ziadhany Test has been added as requested. All test suites pass successfully.

Note: The documentation build is failing due to a broken link in contributing.rst:75 that exists in the main branch - this is unrelated to my changes. I only added a test file and didn't modify any documentation.

Could you please advise if I should:

1. Wait for this to be fixed in main and then rebase
2. Fix the broken link in this PR
3. Proceed as-is since all tests pass

Let me know if you'd like me to fix the documentation link as part of this PR.

[ziadhany]

@mr-raj12 Ignore the CI docs for now, just run the Istio importer locally again and print the logs.

[mr-raj12]

@ziadhany ran the Istio importer locally as requested. The fix works correctly - no more AttributeError. Here are the logs:

Importing data using istio_importer_v2
INFO 2026-01-13 22:55:45.795668 UTC Pipeline [IstioImporterPipeline] starting
INFO 2026-01-13 22:55:45.795840 UTC Step [clone] starting
INFO 2026-01-13 22:55:45.795904 UTC Cloning `git+https://github.com/istio/istio.io`
INFO 2026-01-13 22:59:23.746128 UTC Step [clone] completed in 218 seconds (3.6 minutes)
INFO 2026-01-13 22:59:23.746558 UTC Step [collect_and_store_advisories] starting
INFO 2026-01-13 22:59:23.749206 UTC Collecting 50 advisories
INFO 2026-01-13 22:59:23.922442 UTC Progress: 10% (5/50) ETA: 2 seconds
INFO 2026-01-13 22:59:24.054695 UTC Progress: 20% (10/50) ETA: 1 seconds
INFO 2026-01-13 22:59:24.183932 UTC Progress: 30% (15/50) ETA: 1 seconds
INFO 2026-01-13 22:59:24.330724 UTC Progress: 40% (20/50) ETA: 1 seconds
INFO 2026-01-13 22:59:24.461186 UTC Progress: 50% (25/50) ETA: 1 seconds
INFO 2026-01-13 22:59:24.573701 UTC Progress: 60% (30/50) ETA: 1 seconds
INFO 2026-01-13 22:59:24.698512 UTC Progress: 70% (35/50)
INFO 2026-01-13 22:59:24.826147 UTC Progress: 80% (40/50)
INFO 2026-01-13 22:59:24.974783 UTC Progress: 90% (45/50)
INFO 2026-01-13 22:59:25.083145 UTC Progress: 100% (50/50)
INFO 2026-01-13 22:59:25.118561 UTC Successfully collected 50 advisories
INFO 2026-01-13 22:59:25.118795 UTC Step [collect_and_store_advisories] completed in 1 seconds
INFO 2026-01-13 22:59:25.118893 UTC Step [clean_downloads] starting
INFO 2026-01-13 22:59:25.118955 UTC Removing cloned repository
INFO 2026-01-13 22:59:32.576756 UTC Step [clean_downloads] completed in 7 seconds
INFO 2026-01-13 22:59:32.576930 UTC Pipeline completed in 227 seconds (3.8 minutes)

The importer successfully processed all 50 Istio advisories without errors.