oh-my-git/levels/low-level/blob-remove

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[description]
There's a simple command to remove all objects that are not referenced by anything:
git prune
Remove all blobs in this repository.
[congrats]
Generally, `git prune` will be useful if you want to clean up some objects you made.
Alternatively, you can also click the "Reload" button to restart a level.
[setup]
echo "My master password is a1b2c3d4e5" | git hash-object -w --stdin
echo "This blob really should not exist" | git hash-object -w --stdin
echo "This is a virus" | git hash-object -w --stdin
[setup goal]
[win]
OBJECT_COUNT=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | wc -l)
test "$OBJECT_COUNT" -eq 0