mirror of
https://github.com/git-learning-game/oh-my-git.git
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46 lines
1.7 KiB
Text
46 lines
1.7 KiB
Text
[description]
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When you have a symbolic ref (a ref pointing at another ref), and you decide you want it to be a regular ref again (pointing to an object), you're in for some trouble! :)
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What happens when you try pointing the symbolic ref directly to the blob using `git update-ref`?
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Oops! Turns out that when you reference a symbolic ref, it acts as if you had specified the ref it points to. To de-symbolic-ize it, use the `--no-deref` option directly after `update-ref`!
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Weird, huh?
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[congrats]
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Whew, we've covered a lot of things: Blobs! The index! Trees! Commits! Refs!
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You now know about almost everything about how Git repositories look like on the inside! We think that's pretty cool! :)
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Everything else is just convention and high-level commands that make interacting with the objects more convenient.
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We haven't covered:
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- tag objects (they are the fourth object type - a bit like refs with a description and an author)
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- configuration (allows you to specify remote repositories, for example)
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- working with local files (which is, uh, arguably pretty important :P)
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Thanks for playing! You're welcome to check out the "puzzle" levels in the dropdown, some of them are more advanced!
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[setup]
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BLOB1=$(echo delicious | git hash-object -w --stdin)
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BLOB2=$(echo very | git hash-object -w --stdin)
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git update-ref refs/curly "$BLOB1"
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git symbolic-ref refs/fries refs/curly
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[setup goal]
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BLOB1=$(echo delicious | git hash-object -w --stdin)
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BLOB2=$(echo very | git hash-object -w --stdin)
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git update-ref refs/curly "$BLOB1"
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git symbolic-ref refs/fries refs/curly
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git update-ref --no-deref refs/fries "$BLOB2"
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[win]
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git symbolic-ref refs/fries && return 1
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test "$(git show-ref -s refs/fries)" = "035e2968dafeea08e46e8fe6743cb8123e8b9aa6"
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