考虑以下场景：
我在自己的Git repo中开发了一个小型实验项目a。它现在已经成熟，我希望A成为更大的项目B的一部分，该项目有自己的大仓库。现在我想将A添加为B的子目录。
我如何将A合并为B，而不丢失任何方面的历史？
当前回答
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。
其他回答
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。
要在B中合并a：
1） 在项目A中
git fast-export --all --date-order > /tmp/ProjectAExport
2） 在项目B中
git checkout -b projectA
git fast-import --force < /tmp/ProjectAExport
在这个分支中，执行所有需要执行的操作并提交它们。
C） 然后回到主节点，两个分支之间进行经典合并：
git checkout master
git merge projectA
与@Smar类似，但使用在PRIMARY和SECONDARY中设置的文件系统路径：
PRIMARY=~/Code/project1
SECONDARY=~/Code/project2
cd $PRIMARY
git remote add test $SECONDARY && git fetch test
git merge test/master
然后手动合并。
（改编自阿纳尔·马纳福夫的帖子）
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
如果您试图简单地将两个存储库粘合在一起，那么子模块和子树合并是错误的工具，因为它们不能保留所有的文件历史记录（正如人们在其他答案中所指出的）。请参阅此处的答案，了解简单而正确的方法。
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