在同一个svn-remote中初始提取后添加git分支

问题描述

我使用git-svn来处理svn回购。我不希望整个回购，正弦包含很多遗产，其中包含二进制文件。我只跟踪一些目录。

这是我当前的 .git / config ，它工作正常。

  [core] 
 repositoryformatversion = 0 
 filemode = true 
 bare = false 
 logallrefupdates = true 
 [svn-remotesvn] 
 url = https://svn.example.com/repository 
 fetch = trunk / Python：refs / remotes / trunk 
 branches = branches / {stage，prod，stage_with_proxy} / ucapi /：refs / remotes / * 
 branches = branches / {active} / Python /：refs / remotes / * 
  

现在我想添加一个新的分支：

  branches = branches / {fuze_node} /：refs / remotes / * 
  

做 git svn fetch 新分支对git不可见。它的行为就好像该行不在配置中。

---

我知道这可以用新的svn-remote，但我不想走这条路。

为每个svn-remote git- svn在 .git / svn / .metadata 文件中存储最新提取的修订。它永远不会提取小于该值的修订。这就是为什么它不会获取您添加到配置中的分支; git-svn认为 fuze_node 分支已经被转换。

然而，你可以在不重新克隆整个存储库再次提供：

1. 添加另一个svn-remote，包含您需要获取的所有分支;
   
2. 删除旧的svn-remote;
   
3. 运行 git svn fetch -R newer -svn-remote 从已添加的分支中获取修订。
   

您的配置应该如下所示：

  [core] 
 repositoryformatversion = 0 
 filemode = true 
 bare = false 
 logallrefupdates = true 
＃[svn-remotesvn] 
＃url = https://svn.example.com/repository 
＃fetch = trunk / Python：refs / remotes / trunk 
＃branches = branches / {stage，prod，stage_with_proxy} / ucapi /：refs / remotes / * 
＃branches = branches / {active} / Python /：refs / remotes / * 
 [svn-remotenewer-svn-remote] 
 url = https://svn.example.com/repository 
 fet ch = trunk / Python：refs / remotes / trunk 
 branches = branches / {stage，prod，stage_with_proxy} / ucapi /：refs / remotes / * 
 branches = branches / {active} / Python / refs / remotes / * 
 branches = branches / {fuze_node} /：refs / remotes / * 
  

  branches = branches / { stage，prod，stage_with_proxy} / ucapi /：refs / remotes / * 
  

即 refs / remotes / * 仍应位于映射的右侧。否则，git-svn无法检测到已转换的提交，并尝试再次提取它们。

---

实际上还有另一种实现方式一样。虽然它涉及到一些使用内部git-svn文件的操作。

您可以将必要的分支添加到 .git / config 并更新 .git / svn / .metadata 文件，所以最新提取的修订变为0：

  [svn-remotesvn] 
 reposRoot = https://svn.example.com/repository 
 uuid = 8a6ef855-a4ab-4527 -adea-27b4edd9acb6 
 branches-maxRev = 0 
 tags-maxRev = 0 
  

之后 git svn fetch 将仅提取必要的版本。

I'm using git-svn to work with a svn repo. I don't want the whole repo, sine it contains a lot of legacy, with binaries in it. I'm only tracking some directories.

Here is my current .git/config, which is working fine.

[core]
    repositoryformatversion = 0
    filemode = true
    bare = false
    logallrefupdates = true
[svn-remote "svn"]
    url = https://svn.example.com/repository
    fetch = trunk/Python:refs/remotes/trunk
    branches = branches/{stage,prod,stage_with_proxy}/ucapi/:refs/remotes/*
    branches = branches/{active}/Python/:refs/remotes/*

Now I want to add a new branch:

    branches = branches/{fuze_node}/:refs/remotes/*

but when doing git svn fetch the new branch is not visible to git. It acts as if the line is not in the config.

---

I know this could be done with a new svn-remote, but I would prefer not to take that road.

解决方案

For every svn-remote git-svn stores the latest fetched revision in .git/svn/.metadata file. It never fetches revisions less than that value. That's why it doesn't fetch the branch you've added to config; git-svn thinks fuze_node branch is already converted.

However you can fetch this branch without re-cloning the whole repository once again:

1. Add another svn-remote with all the branches you need to fetch;
2. Remove the older svn-remote;
3. Run git svn fetch -R newer-svn-remote to fetch revisions from the added branch.

Your config should look like this:

[core]
    repositoryformatversion = 0
    filemode = true
    bare = false
    logallrefupdates = true
# [svn-remote "svn"]
#    url = https://svn.example.com/repository
#    fetch = trunk/Python:refs/remotes/trunk
#    branches = branches/{stage,prod,stage_with_proxy}/ucapi/:refs/remotes/*
#    branches = branches/{active}/Python/:refs/remotes/*
[svn-remote "newer-svn-remote"]
    url = https://svn.example.com/repository
    fetch = trunk/Python:refs/remotes/trunk
    branches = branches/{stage,prod,stage_with_proxy}/ucapi/:refs/remotes/*
    branches = branches/{active}/Python/:refs/remotes/*
    branches = branches/{fuze_node}/:refs/remotes/*

Note that you have to specify exactly the same branches mapping as in the older svn-remote:

    branches = branches/{stage,prod,stage_with_proxy}/ucapi/:refs/remotes/*

That is, refs/remotes/* should still be on the right side of the mappings. Otherwise git-svn fails to detect already converted commits and tries to fetch them once again.

---

There's actually another way to achieve the same. It involves some manipulations with internal git-svn files though.

You can just add necessary branch to .git/config and update .git/svn/.metadata file, so the latest fetched revision becomes 0:

[svn-remote "svn"]
    reposRoot = https://svn.example.com/repository
    uuid = 8a6ef855-a4ab-4527-adea-27b4edd9acb6
    branches-maxRev = 0
    tags-maxRev = 0

After that git svn fetch will fetch only necessary revisions.

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