如何解压一个git对象？ [英] How do I unpack a single git object?

问题描述

在回答有关git树形对象内部格式的问题中，获取一个特定的树形对象存储在一个包中，我使用 git unpack-objects 。这似乎是矫枉过正。是的，我意识到命令如 git show --raw ， git ls-tree 或 git cat-file 会将内部格式的关闭。

如何让git输出一个单一的对象的内部格式 - 完整的 blob ，树， commit 或标记标题 - 无论它是以宽松还是打包格式存储？

解决方案

您可以使用 git包 - 对象首先制作一个只包含这一个对象的包。

还要注意，git unpack-objects不会提取存储库中已经存在的对象，所以你可能想创建一个新的存储库。总的来说，像这样的应该是这样的：

$ $ $ code $ $ $ $ $（mktemp -d）
$ echo 5e98806c6cc246acef5f539ae191710a0c06ad3f \
| git pack-objects --stdout \
| （cd$ DIR&&&git init&&& git unpack-objects）

然后在 $ DIR / .git / objects

中查找您的解包对象

In an answer to a question about the internal format of git’s tree objects, to get to one particular tree object that was stored in a pack, I unpacked all of the objects in a repository’s packfiles using git unpack-objects. That seems like overkill. Yes, I realize that commands such git show --raw, git ls-tree, or git cat-file will get close to the internal format.

How do I make git output a single object in its internal format — complete with blob, tree, commit, or tag header — regardless of whether it is stored in loose or packed format?

解决方案

You can use git pack-objects first to make a pack with only this one object.

Note also that git unpack-objects does not extract objects which already exist in a repository, so you probably want to make a new repository. Overall something like this should work:

$ DIR=$(mktemp -d)
$ echo 5e98806c6cc246acef5f539ae191710a0c06ad3f \
   | git pack-objects --stdout \
   | ( cd "$DIR" && git init && git unpack-objects )

Then look for your unpacked object in $DIR/.git/objects

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