如何拆分git存储库并关注目录重命名？ [英] How to split a git repository and follow directory renames?

问题描述

我目前有一个很大的git仓库，它包含许多项目，每个项目都在自己的子目录中。我需要将它分成单独的存储库，每个项目都有自己的存储库。

我试过 git filter-branch --prune-empty --subdirectory-filter PROJECT master

然而，许多项目目录在他们的生活中经历了多次重命名，并且 git filter-branch 没有遵循重命名，所以有效地提取的回购在上次重命名之前没有任何历史记录。

如何从一个大的git仓库中有效地提取一个子目录，并将所有该目录的重命名回溯到过去？

感谢@Chronial，我可以根据自己的需要编写一个脚本来按摩我的git回购：

<$
> git filter-branch --prune-empty --index-filter'
＃删除不需要的文件
git ls-files -z | egrep -zv^（NAME1 | NAME2 | NAME3）|
xargs -0 -r git rm --cached -q
＃将文件移至根目录
git ls-files -s | sed -es-\ t \（NAME1 \ | NAME2 \ | NAME3 \）/ - \t-|
GIT_INDEX_FILE = $ GIT_INDEX_FILE.new \
git update-index --index-info&&
（test！-f$ GIT_INDEX_FILE.new\
|| mv -f$ GIT_INDEX_FILE.new$ GIT_INDEX_FILE）
'


$ b基本上这是这样的：



1. 删除我需要的三个目录NAME1，NAME2或NAME3以外的所有文件 （其中一个项目在其生命周期中被重命名为NAME1 - > NAME2 - > NAME3）。




2. 将这三个目录中的所有内容移动到存储库的根目录。

需要测试是否存在$ GIT_INDEX_FILE.new，因为将svn导入git会创建不带任何文件的提交（仅限目录提交）。只有在最初使用'git svn clone'创建回购时才需要。




I currently have a big git repository that contains many projects, each one in its own subdirectory. I need to split it into individual repositories, each project in its own repo.

I tried git filter-branch --prune-empty --subdirectory-filter PROJECT master

However, many project directories went through several renames in their lives, and git filter-branch does not follow renames, so effectively the extracted repo does not have any history prior to the last rename.

How can I effectively extract a subdirectory from one big git repo, and follow all that directory's renames back into the past?

解决方案

Thanks to @Chronial, I was able to cook a script to massage my git repo according to my needs:

git filter-branch --prune-empty --index-filter '
    # Delete files which are NOT needed
    git ls-files -z | egrep -zv  "^(NAME1|NAME2|NAME3)" | 
        xargs -0 -r git rm --cached -q             
    # Move files to root directory
    git ls-files -s | sed -e "s-\t\(NAME1\|NAME2\|NAME3\)/-\t-" |
        GIT_INDEX_FILE=$GIT_INDEX_FILE.new \
        git update-index --index-info &&
        ( test ! -f "$GIT_INDEX_FILE.new" \
            || mv -f "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE" )
'

Basically what this does is this:

1. Deletes all files outside of the three directories NAME1, NAME2 or NAME3 that I need (one project was renamed NAME1 -> NAME2 -> NAME3 during its lifetime).

2. Moves everything inside these three directories to the root of the repository.

3. I needed to test if "$GIT_INDEX_FILE.new" exists since import of svn into git creates commits without any files (directory-only commits). Needed only if the repo was created with 'git svn clone' initially.

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