How JGit diff analysis identifies impacted test tags

[raakeshdev20]

This thread explores how our Spring Boot service uses JGit to detect changed files and map them to test execution tags.

Key points:

• Detects changed files at file-level granularity
• Uses deterministic rule-based mapping (e.g., /payments/ → @payments)
• Returns impacted test tags as JSON via /test-selector API

Questions / Ideas:

• How would you optimize branch comparison for very large repos?
• Should we cache previous diffs for faster execution?
• Any suggestions for improving mapping accuracy without adding complexity?