合并mainProject中的secondProject:

A)在第二个项目中

git fast-export --all --date-order > /tmp/secondProjectExport

B)在主项目中:

git checkout -b secondProject
git fast-import --force < /tmp/secondProjectExport

在这个分支中完成你需要做的所有繁重的转换并提交它们。

C)然后回到主分支和两个分支之间的经典合并:

git checkout master
git merge secondProject

@MiniQuark解决方案帮助了我很多，但不幸的是，它没有考虑到源存储库中的标记(至少在我的情况下)。以下是我对@ mini夸克答案的改进。

First create directory which will contain composed repo and merged repos, create directory for each merged one. $ mkdir new_phd $ mkdir new_phd/code $ mkdir new_phd/figures $ mkdir new_phd/thesis Do a pull of each repository and fetch all tags. (Presenting instructions only for code sub-directory) $ cd new_phd/code $ git init $ git pull ../../original_phd/code master $ git fetch ../../original_phd/code refs/tags/*:refs/tags/* (This is improvement to point 2 in MiniQuark answer) Move the content of new_phd/code to new_phd/code/code and add code_ prefeix before each tag $ git filter-branch --index-filter 'git ls-files -s | sed "s-\t\"*-&code/-" | GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info && mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE' --tag-name-filter 'sed "s-.*-code_&-"' HEAD After doing so there will be twice as many tags as it was before doing filter-branch. Old tags remain in repo and new tags with code_ prefix are added. $ git tag mytag1 code_mytag1 Remove old tags manually: $ ls .git/refs/tags/* | grep -v "/code_" | xargs rm Repeat point 2,3,4 for other subdirectories Now we have structure of directories as in @MiniQuark anwser point 3. Do as in point 4 of MiniQuark anwser, but after doing a pull and before removing .git dir, fetch tags: $ git fetch catalog refs/tags/*:refs/tags/* Continue..

这是另一个解。希望它能帮助别人，它帮助了我:)

我创造了一个工具来完成这项任务。使用的方法是类似的(内部做一些东西，如——filter-branch)，但更友好。是GPL 2.0

http://github.com/geppo12/GitCombineRepo

git-stitch-repo将在命令行中给出的git存储库上处理git-fast-export——all——date-order的输出，并创建一个适合于git-fast-import的流，该流将创建一个新的存储库，其中包含一个新的提交树中的所有提交，该提交树尊重所有源存储库的历史。

也许，简单地(类似于前面的答案，但使用更简单的命令)在每个单独的旧存储库中进行提交，将内容移动到一个适当命名的子目录中，例如:

$ cd phd/code
$ mkdir code
# This won't work literally, because * would also match the new code/ subdir, but you understand what I mean:
$ git mv * code/
$ git commit -m "preparing the code directory for migration"

然后将三个单独的回购合并为一个新的，通过这样做SMTH:

$ cd ../..
$ mkdir phd.all
$ cd phd.all
$ git init
$ git pull ../phd/code
...

然后您将保存历史记录，但将继续进行单个回购。

Actually, git-stitch-repo now supports branches and tags, including annotated tags (I found there was a bug which I reported, and it got fixed). What i found useful is with tags. Since tags are attached to commits, and some of the solutions (like Eric Lee's approach) fails to deal with tags. You try to create a branch off an imported tag, and it will undo any git merges/moves and sends you back like the consolidated repository being near identical to the repository that the tag came from. Also, there are issues if you use the same tag across multiple repositories that you 'merged/consolidated'. For example, if you have repo's A ad B, both having tag rel_1.0. You merge repo A and repo B into repo AB. Since rel_1.0 tags are on two different commits (one for A and one for B), which tag will be visible in AB? Either the tag from the imported repo A or from imported repo B, but not both.

git-stitch-repo helps to address that problem by creating rel_1.0-A and rel_1.0-B tags. You may not be able to checkout rel_1.0 tag and expect both, but at least you can see both, and theoretically, you can merge them into a common local branch then create a rel_1.0 tag on that merged branch (assuming you just merge and not change source code). It's better to work with branches, as you can merge like branches from each repo into local branches. (dev-a and dev-b can be merged into a local dev branch which can then be pushed to origin).