如何 git-svn 从 Subversion 存储库克隆最后 n 个修订版? [英] How to git-svn clone the last n revisions from a Subversion repository?
问题描述
问题
如何使用 git-svn 从 Subversion 存储库创建浅拷贝，例如你怎么只拉最后三个修订版?
How do you create a shallow copy with git-svn from a Subversion repository, e.g. how do you pull only the last three revisions?
如果您使用选项 --depth，git clone 命令可以从 Git 存储库中获取最后 n 个修订版，即您获得存储库的浅拷贝.示例:
The git clone command can get the last n revisions from a Git repository if you use the option --depth, i.e. you get a shallow copy of the repository. Example:
git clone --depth 3 git://some/repo myshallowcopyrepo
git-svn 有没有类似的选项?
Is there a similar option for git-svn?
我目前的发现
到目前为止，我只找到了 -rN 选项，其中 N 是要提取的修订版.示例:
So far I've only found the -rN option where N is the revision to pull. Example:
git svn clone -rN svn://some/repo
根据文档，可以使用 -r$REVNUMBER:HEAD.我尝试了以下方法来获取返回错误消息的最后 3 个修订版.
According to the documentation there is the possibility to use -r$REVNUMBER:HEAD. I tried the following to get the last 3 revisions which returned an error message.
$ git svn clone --prefix=svn/ -s -rHEAD~3:HEAD http://some/svn/repo .
revision argument: HEAD~3:HEAD not understood by git-svn
所以我将 HEAD~3 替换为第三次但最后一次修订的实际编号 534.这可行，但这需要我首先找出第三次但最后一次提交的修订号.
So I replaced HEAD~3 with the actual number of the third but last revision 534. That worked, but that requires me to first figure out the revision number of the third but last commit.
$ git svn clone --prefix=svn/ -s -r534:HEAD http://some/svn/repo .
文档
推荐答案
您已经发现了在 Git-SVN 中指定浅层克隆的最简单方法，通过指定要开始克隆的 SVN 修订号 (-r$REV:HEAD).
You've already discovered the simplest way to specify a shallow clone in Git-SVN, by specifying the SVN revision number that you want to start your clone at ( -r$REV:HEAD).
例如:git svn clone -s -r1450:HEAD some/svn/repo
Git 的数据结构基于有向无环图 (DAG) 中的指针，这使得回溯 n 次提交变得微不足道.但是在 SVN 中(因此在 Git-SVN 中)你必须自己找到修订号.
Git's data structure is based on pointers in a directed acyclic graph (DAG), which makes it trivial to walk back n commits. But in SVN ( and therefore in Git-SVN) you will have to find the revision number yourself.
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