我想把一个小项目移到一个大项目的子目录中。由于我的小项目没有很多提交，所以我使用了git格式的patch--output directory/path/to/patch dir。然后在更大的项目中，我使用了git-am-directory=dir/in/project/path/to/patch-dir/*。

这感觉比过滤器分支不那么可怕，也更干净。当然，它可能不适用于所有情况。

我遇到了类似的挑战，但在我的情况下，我们在回购协议a中开发了一个版本的代码库，然后将其克隆到新的回购协议B中，用于新版本的产品。修复了回购协议A中的一些错误后，我们需要将更改FI到回购协议B中

向指向回购a的回购B添加远程（git remote add…）拉动当前分支（我们没有使用master修复错误）（git pull-remoteForRepabugFixBranch）将合并推送到github

工作愉快：）

另一个存储库的单个分支可以很容易地放在保留其历史的子目录下。例如：

git subtree add --prefix=rails git://github.com/rails/rails.git master

这将显示为一次提交，其中Rails主分支的所有文件都添加到“Rails”目录中。然而，提交的标题包含对旧历史树的引用：

从提交添加“rails/”<rev>

其中＜rev＞是SHA-1提交哈希。你仍然可以看到历史，责怪一些变化。

git log <rev>
git blame <rev> -- README.md

注意，从这里看不到目录前缀，因为这是一个完整的旧分支。您应该像通常的文件移动提交一样对待它：当到达它时，您需要额外的跳转。

# finishes with all files added at once commit
git log rails/README.md

# then continue from original tree
git log <rev> -- README.md

还有一些更复杂的解决方案，如手动执行此操作或如其他答案所述重写历史。

git子树命令是git contrib的一部分，一些数据包管理器默认安装它（OS X Homebrew）。但除了git之外，您可能还需要自己安装它。

除了使用远程add->fetch->merge策略的所有答案之外：如果您想保留其他存储库中的标记，但不想将它们全部泄漏到一个公共命名空间中（可能会发生冲突），您可能需要稍微更改fetch命令：

git fetch --no-tags other_repo
git fetch --no-tags other_repo 'refs/tags/*:refs/tags/other_repo/*'

第一个命令像往常一样获取所有分支，但省略了附加到提交的标记，第二个命令也省略了通常的标记获取机制（git help fetch了解更多信息），并使用git的refspec功能获取将它们从X映射到other_repo/X的所有标记。

引用（分支、标记）只是git中的文件，您可以使用目录来命名。上面的两个命令将保留第一个存储库中的标记，而另一个存储库的标记将以other_repo作为前缀/

操作完成后，最好移除另一个遥控器，这样您就不会意外地以正常方式获取标签并造成混乱。

如果您想单独维护项目，子模块方法是很好的。然而，如果您真的想将两个项目合并到同一个存储库中，那么您还有更多的工作要做。

第一件事是使用gitfilter分支将第二个存储库中所有内容的名称重写到您希望它们结束的子目录中。因此，您将使用projb/foo.c和projb/bar.html代替foo.c和bar.html。

然后，您应该能够执行以下操作：

git remote add projb [wherever]
git pull projb

git pull将执行git fetch，然后执行git merge。如果您要拉到的存储库还没有projb/目录，那么应该不会有冲突。

进一步搜索表明，在将gitk合并为git时也做了类似的操作。Junio C Hamano在这里写道：http://www.mail-archive.com/git@vger.kernel.org/msg03395.html

我在这里收集了很多关于StackOverFlow等的信息，并设法编写了一个脚本，为我解决了这个问题。

需要注意的是，它只考虑每个存储库的“开发”分支，并将其合并到一个全新存储库中的单独目录中。

标记和其他分支被忽略-这可能不是您想要的。

该脚本甚至处理功能分支和标记-在新项目中重命名它们，以便您知道它们来自何处。

#!/bin/bash
#
################################################################################
## Script to merge multiple git repositories into a new repository
## - The new repository will contain a folder for every merged repository
## - The script adds remotes for every project and then merges in every branch
##   and tag. These are renamed to have the origin project name as a prefix
##
## Usage: mergeGitRepositories.sh <new_project> <my_repo_urls.lst>
## - where <new_project> is the name of the new project to create
## - and <my_repo_urls.lst> is a file contaning the URLs to the respositories
##   which are to be merged on separate lines.
##
## Author: Robert von Burg
##            eitch@eitchnet.ch
##
## Version: 0.3.2
## Created: 2018-02-05
##
################################################################################
#

# disallow using undefined variables
shopt -s -o nounset

# Script variables
declare SCRIPT_NAME="${0##*/}"
declare SCRIPT_DIR="$(cd ${0%/*} ; pwd)"
declare ROOT_DIR="$PWD"
IFS=$'\n'

# Detect proper usage
if [ "$#" -ne "2" ] ; then
  echo -e "ERROR: Usage: $0 <new_project> <my_repo_urls.lst>"
  exit 1
fi


## Script variables
PROJECT_NAME="${1}"
PROJECT_PATH="${ROOT_DIR}/${PROJECT_NAME}"
TIMESTAMP="$(date +%s)"
LOG_FILE="${ROOT_DIR}/${PROJECT_NAME}_merge.${TIMESTAMP}.log"
REPO_FILE="${2}"
REPO_URL_FILE="${ROOT_DIR}/${REPO_FILE}"


# Script functions
function failed() {
  echo -e "ERROR: Merging of projects failed:"
  echo -e "ERROR: Merging of projects failed:" >>${LOG_FILE} 2>&1
  echo -e "$1"
  exit 1
}

function commit_merge() {
  current_branch="$(git symbolic-ref HEAD 2>/dev/null)"
  if [[ ! -f ".git/MERGE_HEAD" ]] ; then
    echo -e "INFO:   No commit required."
    echo -e "INFO:   No commit required." >>${LOG_FILE} 2>&1
  else
    echo -e "INFO:   Committing ${sub_project}..."
    echo -e "INFO:   Committing ${sub_project}..." >>${LOG_FILE} 2>&1
    if ! git commit -m "[Project] Merged branch '$1' of ${sub_project}" >>${LOG_FILE} 2>&1 ; then
      failed "Failed to commit merge of branch '$1' of ${sub_project} into ${current_branch}"
    fi
  fi
}


# Make sure the REPO_URL_FILE exists
if [ ! -e "${REPO_URL_FILE}" ] ; then
  echo -e "ERROR: Repo file ${REPO_URL_FILE} does not exist!"
  exit 1
fi


# Make sure the required directories don't exist
if [ -e "${PROJECT_PATH}" ] ; then
  echo -e "ERROR: Project ${PROJECT_NAME} already exists!"
  exit 1
fi


# create the new project
echo -e "INFO: Logging to ${LOG_FILE}"
echo -e "INFO: Creating new git repository ${PROJECT_NAME}..."
echo -e "INFO: Creating new git repository ${PROJECT_NAME}..." >>${LOG_FILE} 2>&1
echo -e "===================================================="
echo -e "====================================================" >>${LOG_FILE} 2>&1
cd ${ROOT_DIR}
mkdir ${PROJECT_NAME}
cd ${PROJECT_NAME}
git init
echo "Initial Commit" > initial_commit
# Since this is a new repository we need to have at least one commit
# thus were we create temporary file, but we delete it again.
# Deleting it guarantees we don't have conflicts later when merging
git add initial_commit
git commit --quiet -m "[Project] Initial Master Repo Commit"
git rm --quiet initial_commit
git commit --quiet -m "[Project] Initial Master Repo Commit"
echo


# Merge all projects into the branches of this project
echo -e "INFO: Merging projects into new repository..."
echo -e "INFO: Merging projects into new repository..." >>${LOG_FILE} 2>&1
echo -e "===================================================="
echo -e "====================================================" >>${LOG_FILE} 2>&1
for url in $(cat ${REPO_URL_FILE}) ; do

  if [[ "${url:0:1}" == '#' ]] ; then
    continue
  fi

  # extract the name of this project
  export sub_project=${url##*/}
  sub_project=${sub_project%*.git}

  echo -e "INFO: Project ${sub_project}"
  echo -e "INFO: Project ${sub_project}" >>${LOG_FILE} 2>&1
  echo -e "----------------------------------------------------"
  echo -e "----------------------------------------------------" >>${LOG_FILE} 2>&1

  # Fetch the project
  echo -e "INFO:   Fetching ${sub_project}..."
  echo -e "INFO:   Fetching ${sub_project}..." >>${LOG_FILE} 2>&1
  git remote add "${sub_project}" "${url}"
  if ! git fetch --tags --quiet ${sub_project} >>${LOG_FILE} 2>&1 ; then
    failed "Failed to fetch project ${sub_project}"
  fi

  # add remote branches
  echo -e "INFO:   Creating local branches for ${sub_project}..."
  echo -e "INFO:   Creating local branches for ${sub_project}..." >>${LOG_FILE} 2>&1
  while read branch ; do
    branch_ref=$(echo $branch | tr " " "\t" | cut -f 1)
    branch_name=$(echo $branch | tr " " "\t" | cut -f 2 | cut -d / -f 3-)

    echo -e "INFO:   Creating branch ${branch_name}..."
    echo -e "INFO:   Creating branch ${branch_name}..." >>${LOG_FILE} 2>&1

    # create and checkout new merge branch off of master
    if ! git checkout -b "${sub_project}/${branch_name}" master >>${LOG_FILE} 2>&1 ; then failed "Failed preparing ${branch_name}" ; fi
    if ! git reset --hard ; then failed "Failed preparing ${branch_name}" >>${LOG_FILE} 2>&1 ; fi
    if ! git clean -d --force ; then failed "Failed preparing ${branch_name}" >>${LOG_FILE} 2>&1 ; fi

    # Merge the project
    echo -e "INFO:   Merging ${sub_project}..."
    echo -e "INFO:   Merging ${sub_project}..." >>${LOG_FILE} 2>&1
    if ! git merge --allow-unrelated-histories --no-commit "remotes/${sub_project}/${branch_name}" >>${LOG_FILE} 2>&1 ; then
      failed "Failed to merge branch 'remotes/${sub_project}/${branch_name}' from ${sub_project}"
    fi

    # And now see if we need to commit (maybe there was a merge)
    commit_merge "${sub_project}/${branch_name}"

    # relocate projects files into own directory
    if [ "$(ls)" == "${sub_project}" ] ; then
      echo -e "WARN:   Not moving files in branch ${branch_name} of ${sub_project} as already only one root level."
      echo -e "WARN:   Not moving files in branch ${branch_name} of ${sub_project} as already only one root level." >>${LOG_FILE} 2>&1
    else
      echo -e "INFO:   Moving files in branch ${branch_name} of ${sub_project} so we have a single directory..."
      echo -e "INFO:   Moving files in branch ${branch_name} of ${sub_project} so we have a single directory..." >>${LOG_FILE} 2>&1
      mkdir ${sub_project}
      for f in $(ls -a) ; do
        if  [[ "$f" == "${sub_project}" ]] ||
            [[ "$f" == "." ]] ||
            [[ "$f" == ".." ]] ; then
          continue
        fi
        git mv -k "$f" "${sub_project}/"
      done

      # commit the moving
      if ! git commit --quiet -m  "[Project] Move ${sub_project} files into sub directory" ; then
        failed "Failed to commit moving of ${sub_project} files into sub directory"
      fi
    fi
    echo
  done < <(git ls-remote --heads ${sub_project})


  # checkout master of sub probject
  if ! git checkout "${sub_project}/master" >>${LOG_FILE} 2>&1 ; then
    failed "sub_project ${sub_project} is missing master branch!"
  fi

  # copy remote tags
  echo -e "INFO:   Copying tags for ${sub_project}..."
  echo -e "INFO:   Copying tags for ${sub_project}..." >>${LOG_FILE} 2>&1
  while read tag ; do
    tag_ref=$(echo $tag | tr " " "\t" | cut -f 1)
    tag_name_unfixed=$(echo $tag | tr " " "\t" | cut -f 2 | cut -d / -f 3)

    # hack for broken tag names where they are like 1.2.0^{} instead of just 1.2.0
    tag_name="${tag_name_unfixed%%^*}"

    tag_new_name="${sub_project}/${tag_name}"
    echo -e "INFO:     Copying tag ${tag_name_unfixed} to ${tag_new_name} for ref ${tag_ref}..."
    echo -e "INFO:     Copying tag ${tag_name_unfixed} to ${tag_new_name} for ref ${tag_ref}..." >>${LOG_FILE} 2>&1
    if ! git tag "${tag_new_name}" "${tag_ref}" >>${LOG_FILE} 2>&1 ; then
      echo -e "WARN:     Could not copy tag ${tag_name_unfixed} to ${tag_new_name} for ref ${tag_ref}"
      echo -e "WARN:     Could not copy tag ${tag_name_unfixed} to ${tag_new_name} for ref ${tag_ref}" >>${LOG_FILE} 2>&1
    fi
  done < <(git ls-remote --tags --refs ${sub_project})

  # Remove the remote to the old project
  echo -e "INFO:   Removing remote ${sub_project}..."
  echo -e "INFO:   Removing remote ${sub_project}..." >>${LOG_FILE} 2>&1
  git remote rm ${sub_project}

  echo
done


# Now merge all project master branches into new master
git checkout --quiet master
echo -e "INFO: Merging projects master branches into new repository..."
echo -e "INFO: Merging projects master branches into new repository..." >>${LOG_FILE} 2>&1
echo -e "===================================================="
echo -e "====================================================" >>${LOG_FILE} 2>&1
for url in $(cat ${REPO_URL_FILE}) ; do

  if [[ ${url:0:1} == '#' ]] ; then
    continue
  fi

  # extract the name of this project
  export sub_project=${url##*/}
  sub_project=${sub_project%*.git}

  echo -e "INFO:   Merging ${sub_project}..."
  echo -e "INFO:   Merging ${sub_project}..." >>${LOG_FILE} 2>&1
  if ! git merge --allow-unrelated-histories --no-commit "${sub_project}/master" >>${LOG_FILE} 2>&1 ; then
    failed "Failed to merge branch ${sub_project}/master into master"
  fi

  # And now see if we need to commit (maybe there was a merge)
  commit_merge "${sub_project}/master"

  echo
done


# Done
cd ${ROOT_DIR}
echo -e "INFO: Done."
echo -e "INFO: Done." >>${LOG_FILE} 2>&1
echo

exit 0

你也可以从http://paste.ubuntu.com/11732805

首先创建一个包含每个存储库URL的文件，例如：

git@github.com:eitchnet/ch.eitchnet.parent.git
git@github.com:eitchnet/ch.eitchnet.utils.git
git@github.com:eitchnet/ch.eitchnet.privilege.git

然后调用脚本，给出项目名称和脚本路径：

./mergeGitRepositories.sh eitchnet_test eitchnet.lst

脚本本身有很多注释，应该可以解释它的作用。