mirror of
https://github.com/git-learning-game/oh-my-git.git
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42 lines
1.2 KiB
Text
42 lines
1.2 KiB
Text
[description]
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Let's take a look at "refs" (short for "references")! Refs are not objects, but rather very simple *pointers* to objects! They can help you keep track of what's where.
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You can create or update a ref with
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git update-ref refs/<refname> <newvalue>
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Make sure to always start a ref's name with "refs/"! That's a convention that helps Git find all refs you create. If you forget the "refs/", you will not see the ref.
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Create refs that point to all objects in this repository!
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[setup]
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echo hello > hello
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echo world > world
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BLOB1=$(git hash-object -w hello)
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BLOB2=$(git hash-object -w world)
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git add .
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TREE=$(git write-tree)
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COMMIT=$(git commit-tree $TREE -m "Initial commit")
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[setup goal]
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echo hello > hello
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echo world > world
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BLOB1=$(git hash-object -w hello)
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BLOB2=$(git hash-object -w world)
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git add .
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TREE=$(git write-tree)
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COMMIT=$(git commit-tree $TREE -m "Initial commit")
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git update-ref refs/a $BLOB1
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git update-ref refs/b $BLOB2
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git update-ref refs/c $TREE
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git update-ref refs/d $COMMIT
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[win]
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OBJECTS=$(git cat-file --batch-check='%(objectname)' --batch-all-objects | sort)
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REF_TARGETS=$(git show-ref -s | sort | uniq)
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test "$OBJECTS" = "$REF_TARGETS"
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