feat(lab3): SSH signing + gitleaks pre-commit + history rewrite practice

[Muratich]

Goal

Complete Lab 3 by configuring commit signing, pre-commit hooks, secret scanning with Gitleaks, and practicing Git history rewriting with git-filter-repo.

Changes

• Added / updated:

  • submissions/lab3.md
  • .pre-commit-config.yaml
  • Git commit signing configuration

• Other changes:

  • Configured SSH commit signing
  • Installed and tested pre-commit hooks
  • Verified Gitleaks secret detection
  • Completed git-filter-repo history rewrite exercise

Testing

• Commands run:

  • git log --show-signature -1
  • py -m pre_commit run --all-files
  • git commit -m "test: should be blocked by gitleaks"
  • py -m git_filter_repo --replace-text replace.txt --force

• Observed output:

  • Commit signatures were successfully generated and validated locally
  • Pre-commit hooks executed before commits
  • Gitleaks detected and blocked test secrets
  • git-filter-repo removed the test secret from repository history

Artifacts & Screenshots

• submissions/lab3.md

• Screenshots / links:

  • Verified commit signing configuration
  • Gitleaks blocking a commit containing a test secret
  • Successful history rewrite with git-filter-repo

Checklist

• Title is clear (feat(lab3): commit signing and secret scanning)
• No secrets or large temp files are committed
• Submission file at submissions/lab3.md exists
• Task 1 — SSH signing configured + Verified badge on commit
• Task 2 — .pre-commit-config.yaml + gitleaks demonstrably blocking
• Bonus — filter-repo rewrite practice documented