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Git - How to merge two repositories into one using git subtree add

Git - How to merge two repositories into one using git subtree add

September 30, 2024

How to merge two repositories into one

例如你已經開發一個 web 一段時間，有一個 backend 的 repo 和一個 frontend 的 repo，現在想要將它們合併成一個 repo，又不想完全失去之前的歷史記錄，就可以用 git subtree add 加入指定 repo 的 commit tree。

git subtree add 

git subtree add -P <prefix> add <repository> <remote-ref>
  • <prefix>: 要放在哪個 subdirectory
  • <repository>: repository link
  • <remote-ref>: branch

Example 

# Go to your new project folder and init git
echo "# my_project" >> README.md
git init

 # You must have one commit to use git subtree add
git add README.md
git commit -m "first commit"

# For example, put the backend repo into the backend folder
git subtree add -P backend https://github.com/path_to_backend.git main

# And frontend folder
git subtree add -P frontend https://github.com/path_to_frontend.git main

Ref

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