下面是脚本，将立即工作。

#!/bin/bash -xe
# script name: merge-repo.sh
# To merge repositories into the current.
# To see the log of the new repo use 'git log --follow -- unprefixed-filename'
# So if the file is repo/test.cpp use 'git log --follow -- test.cpp'
# I'm not sure how this will work when two files have the same name.
#
# `git branch -a` will show newly created branches.
# You can delete them if you want.
merge_another() {
    repo="$1" # url of the remote repo
    rn="$2"   # new name of the repo, you can keep the same name as well.
    git remote add ${rn} ${repo}
    git fetch ${rn}
    git merge -s ours --no-commit --allow-unrelated-histories ${rn}/master
    git read-tree --prefix=${rn}/ -u ${rn}/master
    git commit -m "Imported ${rn} as a subtree."
    git pull -s subtree ${rn} master
}

merge_another $1 $2

运行脚本。转到您希望合并另一个repo的repo，并运行脚本。

cd base-repo
./merge-repo.sh git@github.com:username/repo-to-be-merged.git repo-to-be-merged-new-name

现在将主分支上的更改推到remote/origin。根据您要做的事情，可能不需要此步骤。

git push origin master

我可以为你的问题建议另一个解决方案(替代git-submodules) - gil (git链接)工具

它允许描述和管理复杂的git存储库依赖关系。

同时也为git递归子模块依赖问题提供了解决方案。

假设你有以下项目依赖项: 示例git存储库依赖关系图

然后你可以用存储库关系描述定义.gitlinks文件:

# Projects
CppBenchmark CppBenchmark https://github.com/chronoxor/CppBenchmark.git master
CppCommon CppCommon https://github.com/chronoxor/CppCommon.git master
CppLogging CppLogging https://github.com/chronoxor/CppLogging.git master

# Modules
Catch2 modules/Catch2 https://github.com/catchorg/Catch2.git master
cpp-optparse modules/cpp-optparse https://github.com/weisslj/cpp-optparse.git master
fmt modules/fmt https://github.com/fmtlib/fmt.git master
HdrHistogram modules/HdrHistogram https://github.com/HdrHistogram/HdrHistogram_c.git master
zlib modules/zlib https://github.com/madler/zlib.git master

# Scripts
build scripts/build https://github.com/chronoxor/CppBuildScripts.git master
cmake scripts/cmake https://github.com/chronoxor/CppCMakeScripts.git master

每一行描述git链接的格式如下:

存储库的唯一名称 存储库的相对路径(从.gitlinks文件的路径开始) Git存储库，将用于Git克隆命令 要检出的存储库分支 空行或以#开头的行不会被解析(作为注释处理)。

最后，你必须更新你的根示例库:

# Clone and link all git links dependencies from .gitlinks file
gil clone
gil link

# The same result with a single command
gil update

因此，您将克隆所有必需的项目，并以适当的方式将它们相互链接。

如果你想提交一些存储库中的所有更改，以及子链接存储库中的所有更改，你可以用一个命令来完成:

gil commit -a -m "Some big update"

Pull、push命令的工作原理类似:

gil pull
gil push

Gil (git链接)工具支持以下命令:

usage: gil command arguments
Supported commands:
    help - show this help
    context - command will show the current git link context of the current directory
    clone - clone all repositories that are missed in the current context
    link - link all repositories that are missed in the current context
    update - clone and link in a single operation
    pull - pull all repositories in the current directory
    push - push all repositories in the current directory
    commit - commit all repositories in the current directory

更多关于git递归子模块的依赖问题。

下面是脚本，将立即工作。

#!/bin/bash -xe
# script name: merge-repo.sh
# To merge repositories into the current.
# To see the log of the new repo use 'git log --follow -- unprefixed-filename'
# So if the file is repo/test.cpp use 'git log --follow -- test.cpp'
# I'm not sure how this will work when two files have the same name.
#
# `git branch -a` will show newly created branches.
# You can delete them if you want.
merge_another() {
    repo="$1" # url of the remote repo
    rn="$2"   # new name of the repo, you can keep the same name as well.
    git remote add ${rn} ${repo}
    git fetch ${rn}
    git merge -s ours --no-commit --allow-unrelated-histories ${rn}/master
    git read-tree --prefix=${rn}/ -u ${rn}/master
    git commit -m "Imported ${rn} as a subtree."
    git pull -s subtree ${rn} master
}

merge_another $1 $2

运行脚本。转到您希望合并另一个repo的repo，并运行脚本。

cd base-repo
./merge-repo.sh git@github.com:username/repo-to-be-merged.git repo-to-be-merged-new-name

现在将主分支上的更改推到remote/origin。根据您要做的事情，可能不需要此步骤。

git push origin master

请参阅本文中的基本示例，并考虑在存储库上进行这样的映射:

A <-> yyy， B <-> XXX

完成本章描述的所有活动(合并后)，移除分支B-master:

$ git branch -d B-master

然后，推动更改。

这对我很管用。

根据这篇文章，使用子树对我来说是有效的，只转移了适用的历史。在这里发布，以防有人需要这些步骤(确保将占位符替换为适用于你的值):

在源存储库中将子文件夹拆分为一个新的分支

Git子树拆分——prefix=<source-path-to-merge> -b subtree-split-result

在你的目标repo合并在拆分结果分支

git remote add merge-source-repo <path-to-your-source-repository>
git fetch merge-source-repo
git merge -s ours --no-commit merge-source-repo/subtree-split-result
git read-tree --prefix=<destination-path-to-merge-into> -u merge-source-repo/subtree-split-result

验证您的更改并提交

git status
git commit

别忘了

通过删除子树拆分结果分支进行清理

git branch -D subtree-split-result

删除为从源repo获取数据而添加的远程

Git远程rm merge-source-repo

这个函数会将远程repo复制到本地repo目录，合并后所有的提交都会被保存，git日志会显示原始的提交和正确的路径:

function git-add-repo
{
    repo="$1"
    dir="$(echo "$2" | sed 's/\/$//')"
    path="$(pwd)"

    tmp="$(mktemp -d)"
    remote="$(echo "$tmp" | sed 's/\///g'| sed 's/\./_/g')"

    git clone "$repo" "$tmp"
    cd "$tmp"

    git filter-branch --index-filter '
        git ls-files -s |
        sed "s,\t,&'"$dir"'/," |
        GIT_INDEX_FILE="$GIT_INDEX_FILE.new" git update-index --index-info &&
        mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"
    ' HEAD

    cd "$path"
    git remote add -f "$remote" "file://$tmp/.git"
    git pull "$remote/master"
    git merge --allow-unrelated-histories -m "Merge repo $repo into master" --edit "$remote/master"
    git remote remove "$remote"
    rm -rf "$tmp"
}

使用方法:

cd current/package
git-add-repo https://github.com/example/example dir/to/save

如果做一点改变，你甚至可以移动文件/dirs合并repo到不同的路径，例如:

repo="https://github.com/example/example"
path="$(pwd)"

tmp="$(mktemp -d)"
remote="$(echo "$tmp" | sed 's/\///g' | sed 's/\./_/g')"

git clone "$repo" "$tmp"
cd "$tmp"

GIT_ADD_STORED=""

function git-mv-store
{
    from="$(echo "$1" | sed 's/\./\\./')"
    to="$(echo "$2" | sed 's/\./\\./')"

    GIT_ADD_STORED+='s,\t'"$from"',\t'"$to"',;'
}

# NOTICE! This paths used for example! Use yours instead!
git-mv-store 'public/index.php' 'public/admin.php'
git-mv-store 'public/data' 'public/x/_data'
git-mv-store 'public/.htaccess' '.htaccess'
git-mv-store 'core/config' 'config/config'
git-mv-store 'core/defines.php' 'defines/defines.php'
git-mv-store 'README.md' 'doc/README.md'
git-mv-store '.gitignore' 'unneeded/.gitignore'

git filter-branch --index-filter '
    git ls-files -s |
    sed "'"$GIT_ADD_STORED"'" |
    GIT_INDEX_FILE="$GIT_INDEX_FILE.new" git update-index --index-info &&
    mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"
' HEAD

GIT_ADD_STORED=""

cd "$path"
git remote add -f "$remote" "file://$tmp/.git"
git pull "$remote/master"
git merge --allow-unrelated-histories -m "Merge repo $repo into master" --edit "$remote/master"
git remote remove "$remote"
rm -rf "$tmp"

通知 路径替换通过sed，所以确保它在合并后移动到正确的路径。 ——allow-unrelated-histories参数只存在于git >= 2.9之后。