oh-my-git/levels/low-level/puzzle-trees-all-the-way-down

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[description]
Construct a chain of three trees, which don't point to anything else.
This is hard! The `git mktree` command might be useful.
[setup]
[setup goal]
git mktree
TREE=$(echo -e "040000 tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904\tdir" | git mktree)
echo -e "040000 tree $TREE\tdir" | git mktree
[win]
TREES=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep tree | cut -f1 -d" ")
for TREE in $TREES; do
if [ "$(git cat-file -p $TREE | wc -l)" -eq 1 ]; then
if [ "$(git cat-file -p $TREE | cut -f1 | grep tree | wc -l)" -eq 1 ]; then
# So the tree has exactly one child, and it is a tree!
TREE2=$(git cat-file -p $TREE | cut -f1 | grep tree | cut -f3 -d" ")
if [ "$(git cat-file -p $TREE2 | wc -l)" -eq 1 ]; then
if [ "$(git cat-file -p $TREE2 | cut -f1 | grep tree | wc -l)" -eq 1 ]; then
# Same for its child! \o/
return 0
fi
fi
fi
fi
done
return 1