Implement hands on hp-ignore-file

[MousseDm]

Exercise Review

Exercise Discussion

#58

Checklist

• If you require a new remote repository on the Git-Mastery organization, have you created a request for it?
• Have you written unit tests using repo-smith to validate the exercise grading scheme?
• Have you tested the download script using test-download.sh?
• Have you verified that this exercise does not already exist or is not currently in review?
• Did you introduce a new grading mechanism that should belong to git-autograder?
• Did you introduce a new dependency that should belong to app?

[Copilot]

Pull Request Overview

This PR adds a new hands-on exercise that demonstrates how .gitignore files work in Git. The exercise creates a sandbox repository with a .gitignore file and demonstrates which files are tracked versus ignored.

• Creates a new ignore_file.py module in the hands_on directory
• Sets up a Git repository with a .gitignore that excludes logs/ directory and *.tmp files
• Demonstrates tracked vs. ignored files by creating files that match ignore patterns

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[woojiahao]

@MousseDm Curious but where did you get the instructions for the download function? The hands-on discussion you linked includes the equivalent Bash commands for creating the sandbox.

If you can implement the instructions as per the approved hands-on discussion, that would be good!

[MousseDm]

I see why my earlier implementation used a sandbox/ directory.
I was following the general contributor documentation on creating hands-ons, which describes how the Git-Mastery App sets up a sandbox for students to do the practical and I assumed each hands-on should therefore create its own sandbox/ folder as the working directory.

I have already rechecked the issue #58 and updated my script accordingly so it shall match the steps now.

Also, I notice that for exercises, the structure for each is something like:
hp_ignore_file/
├─ .gitmastery-exercise.json
├─ README.md
├─ init.py
├─ download.py
├─ verify.py
├─ tests
Should I also modify the hp structure like this?

Thanks for pointing me in the right direction!