我们的Git存储库最初是一个大型SVN存储库的一部分，其中每个项目都有自己的树，如下所示:
project1/branches
/tags
/trunk
project2/branches
/tags
/trunk
显然，使用svn mv将文件从一个文件移动到另一个文件非常容易。但是在Git中，每个项目都在它自己的存储库中，今天我被要求将一个子目录从project2移动到project1。我是这样做的:
$ git clone project2
$ cd project2
$ git filter-branch --subdirectory-filter deeply/buried/java/source/directory/A -- --all
$ git remote rm origin # so I don't accidentally overwrite the repo ;-)
$ mkdir -p deeply/buried/different/java/source/directory/B
$ for f in *.java; do
> git mv $f deeply/buried/different/java/source/directory/B
> done
$ git commit -m "moved files to new subdirectory"
$ cd ..
$
$ git clone project1
$ cd project1
$ git remote add p2 ../project2
$ git fetch p2
$ git branch p2 remotes/p2/master
$ git merge p2 # --allow-unrelated-histories for git 2.9+
$ git remote rm p2
$ git push
但这似乎相当复杂。有没有更好的方法来做这类事情呢?还是我采取了正确的方法?
注意，这涉及到将历史合并到现有的存储库中，而不是简单地从另一个存储库的一部分创建一个新的独立存储库(如前面的问题中所述)。
使用来自http://blog.neutrino.es/2012/git-copy-a-file-or-directory-from-another-repository-preserving-history/的灵感，我创建了这个Powershell函数来做同样的事情，到目前为止对我来说效果很好:
# Migrates the git history of a file or directory from one Git repo to another.
# Start in the root directory of the source repo.
# Also, before running this, I recommended that $destRepoDir be on a new branch that the history will be migrated to.
# Inspired by: http://blog.neutrino.es/2012/git-copy-a-file-or-directory-from-another-repository-preserving-history/
function Migrate-GitHistory
{
# The file or directory within the current Git repo to migrate.
param([string] $fileOrDir)
# Path to the destination repo
param([string] $destRepoDir)
# A temp directory to use for storing the patch file (optional)
param([string] $tempDir = "\temp\migrateGit")
mkdir $tempDir
# git log $fileOrDir -- to list commits that will be migrated
Write-Host "Generating patch files for the history of $fileOrDir ..." -ForegroundColor Cyan
git format-patch -o $tempDir --root -- $fileOrDir
cd $destRepoDir
Write-Host "Applying patch files to restore the history of $fileOrDir ..." -ForegroundColor Cyan
ls $tempDir -Filter *.patch `
| foreach { git am $_.FullName }
}
这个例子的用法:
git clone project2
git clone project1
cd project1
# Create a new branch to migrate to
git checkout -b migrate-from-project2
cd ..\project2
Migrate-GitHistory "deeply\buried\java\source\directory\A" "..\project1"
完成此操作后，可以在合并migrate-from-project2分支之前重新组织该分支上的文件。
我发现Ross Hendrickson的博客很有用。这是一种非常简单的方法，您可以创建应用于新回购的补丁。更多细节请参见链接页面。
它只包含三个步骤(复制自博客):
# Setup a directory to hold the patches
mkdir <patch-directory>
# Create the patches
git format-patch -o <patch-directory> --root /path/to/copy
# Apply the patches in the new repo using a 3 way merge in case of conflicts
# (merges from the other repo are not turned into patches).
# The 3way can be omitted.
git am --3way <patch-directory>/*.patch
唯一的问题是我不能一次性应用所有补丁
git am --3way <patch-directory>/*.patch
在Windows下，我得到了一个InvalidArgument错误。所以我不得不一个接一个地打补丁。
