我刚刚发现git-subtree工具，前一段时间成为主要git repo的一部分
然而，我不完全明白这个工具提供什么功能已有的git read-tree+git merge -s subtree。是唯一的git-subtree的purpouse - 使得结果提交历史看起来更好，还是它有更多我忽略的功能？
你描述的命令将一个子树读入一个存储库。 git-subtree 命令有更多选项，如其中，您可以（注释为简单起见）：
add ::
创建<前缀>通过从给定的< refspec>导入其内容
，或< repository>和远程< refspec> ;.
merge ::
将最近的更改合并到< commit>到<前缀>
子树。
pull ::
完全类似于'merge'，但是在
中并行'git pull'它从指定的远程
仓库获取给定的提交。
push ::
使用<前缀>进行'拆分'（见上）提供
，然后执行'git push'将结果推送到
存储库并引用refspec。这可用于将
子树推送到远程存储库的不同分支。
split ::
从< prefix>的
历史记录中提取新的合成项目历史记录。子树。新历史
仅包括
影响<前>的提交（包括合并），并且这些提交中的每一个现在都具有< prefix>的
内容。在项目的根目录下，而不是子目录中的
。因此，新创建的历史
适合作为单独的git存储库导出。
还有各种帮助和操纵上述的标志。我相信所有这些选项都可以通过管道连接命令获得。 git-subtree.sh 只是包装它们，使它们更容易执行。
I've just found git-subtree tool that some time ago became a part of main git repohttps://github.com/apenwarr/git-subtree/
However I don't fully understand what functionality does this tool provide over the already existing "git read-tree" + "git merge -s subtree". Is the only purpouse of git-subtree - making the resultant commit history look better or does it have more functionality that I've overlooked?
The commands you describe reads a subtree into a repository. The git-subtree command has many more options, as described by the documentation. Among others, you can (annotated for simplicity):
add::
Create the <prefix> subtree by importing its contents
from the given <refspec> or <repository> and remote <refspec>.
merge::
Merge recent changes up to <commit> into the <prefix>
subtree.
pull::
Exactly like 'merge', but parallels 'git pull' in that
it fetches the given commit from the specified remote
repository.
push::
Does a 'split' (see above) using the <prefix> supplied
and then does a 'git push' to push the result to the
repository and refspec. This can be used to push your
subtree to different branches of the remote repository.
split::
Extract a new, synthetic project history from the
history of the <prefix> subtree. The new history
includes only the commits (including merges) that
affected <prefix>, and each of those commits now has the
contents of <prefix> at the root of the project instead
of in a subdirectory. Thus, the newly created history
is suitable for export as a separate git repository.
There are also a variety of flags that aid and manipulate the above. I believe all these options were available before via chains of plumbing commands. git-subtree.sh just wraps them and makes them considerably easier to execute.
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