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Aske Olsson,Rasmus Voss

Git Version Control Cookbook

  • DDaudalagidfez uma citaçãoano passado
    When a file is moved to the staging area, the SHA-1 hash of the file is created and the blob object is written to Git's database.
  • DDaudalagidfez uma citaçãoano passado
    The add command, generally speaking, moves files from the working directory to the staging area, but more than this actually happens, though you don't see it.
  • DDaudalagidfez uma citaçãoano passado
    The special notation HEAD^{tree} means that from the reference given, (HEAD) recursively dereferences the object at the reference until a tree object is found.
  • DDaudalagidfez uma citaçãoano passado
    Normally, it is not used in everyday Git commands, but it is quite useful to investigate how it ties together the objects. We can also verify the output of git cat-file, by rehashing it with the Git command git hash-object; for example, if we want to verify the commit object at HEAD (34acc370b4d6ae53f051255680feaefaf7f7850d), we can run the following command:
  • DDaudalagidfez uma citaçãoano passado
    We can verify that this is the latest commit by running git log -1
  • DDaudalagidfez uma citaçãoano passado
    Files, or blobs as they are also called in the Git context
    Directories, or trees in the Git context
    Commits
    Tags
  • DDaudalagidfez uma citaçãoano passado
    There are four types of objects in Git, branches (which are not objects, but are important), and the special HEAD pointer that refers to the branch/commit currently checked out.
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    Git's object storage is a key-value storage, the key being the ID of the object and the value being the object itself. The key is an SHA-1 hash of the object, with some additional information such as size.
  • DDaudalagidfez uma citaçãoano passado
    The way Git references the files and directories it tracks is directly built into the data model.
  • DDaudalagidfez uma citaçãoano passado
    Git is different; instead of the regular file and patches list, Git records a snapshot of all the files tracked by Git and their paths relative to the repository root, that is, the files tracked by Git in the file system tree.
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