我稍微手动合并项目，这使我可以避免处理合并冲突。

首先，从另一个项目中复制文件，无论您需要什么。

cp -R myotherproject newdirectory
git add newdirectory

历史上的下一次拉力

git fetch path_or_url_to_other_repo

告诉git在上次获取的历史记录中合并

echo 'FETCH_HEAD' > .git/MERGE_HEAD

现在按您通常的方式提交

git commit

如果两个存储库都有相同类型的文件（就像两个Rails存储库用于不同的项目），您可以将辅助存储库的数据提取到当前存储库中：

git fetch git://repository.url/repo.git master:branch_name

然后将其合并到当前存储库：

git merge --allow-unrelated-histories branch_name

如果您的Git版本小于2.9，请删除--允许不相关的历史记录。

在此之后，可能会发生冲突。例如，可以使用gitmergetool来解析它们。kdiff3只能与键盘一起使用，因此在读取代码时仅需几分钟，就会产生5个冲突文件。

记住完成合并：

git commit

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。

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：）

如果您想将来自存储库B分支的文件放在存储库a的子树中，并保留历史记录，请继续阅读。（在下面的示例中，我假设我们希望回购协议B的主分支合并为回购协议A的主分支。）

在回购协议A中，首先执行以下操作以使回购协议B可用：

git remote add B ../B # Add repo B as a new remote.
git fetch B

现在我们在回购a中创建了一个全新的分支（只有一个提交），我们称之为new_b_root。生成的提交将包含在repo B的主分支的第一次提交中提交的文件，但这些文件放在名为path/to/B-files/的子目录中。

git checkout --orphan new_b_root master
git rm -rf . # Remove all files.
git cherry-pick -n `git rev-list --max-parents=0 B/master`
mkdir -p path/to/b-files
git mv README path/to/b-files/
git commit --date="$(git log --format='%ai' $(git rev-list --max-parents=0 B/master))"

解释：checkout命令的--孤儿选项从A的主分支检出文件，但不创建任何提交。我们可以选择任何提交，因为接下来我们无论如何都要清除所有文件。然后，在尚未提交（-n）的情况下，我们从B的主分支中选择第一个提交。（cherry pick保留了原始的提交消息，而直接签出似乎无法做到这一点。）然后我们创建一个子树，将所有来自repo B的文件放在那里。然后我们必须将cherry stick中引入的所有文件移动到子树中。在上面的示例中，只有一个README文件可以移动。然后我们提交B-repo根提交，同时，我们还保留原始提交的时间戳。

现在，我们将在新创建的new_B_root上创建一个新的B/master分支。我们称新分支为b：

git checkout -b b B/master
git rebase -s recursive -Xsubtree=path/to/b-files/ new_b_root

现在，我们将b分支合并为A/master：

git checkout master
git merge --allow-unrelated-histories --no-commit b
git commit -m 'Merge repo B into repo A.'

最后，您可以删除B个远程和临时分支：

git remote remove B
git branch -D new_b_root b

最终图形的结构如下：

当您希望在一次提交中合并三个或更多项目时，请执行其他答案中所述的步骤（远程添加-f，合并）。然后，（软）将索引重置为旧头（没有合并）。添加所有文件（git-Add-A）并提交它们（消息“将项目A、B、C和D合并到一个项目中”）。这现在是master的提交id。

现在，使用以下内容创建.git/info/places：

<commit-id of master> <list of commit ids of all parents>

运行gitfilter分支--head^。。头头^2.头头^3.头。如果你有三个以上的分支，就加上同样多的头。。当你有树枝的时候，就把头伸过去。要更新标记，请追加--tag-namefilter cat。不要总是添加，因为这可能会导致某些提交的重写。有关详细信息，请参阅过滤器分支的手册页，搜索“移植物”。

现在，你的最后一次承诺与正确的父母相关。