有时我们fork一个项目到我们账号下,但是又想同步更新原先的内容,怎么办?别着急 remote upstream可以来搞定。

1.先使用git remote -v查看远程状态。

git remote -v
origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)

2.指定一个远程的 remote upstream 用以同步,也就是你fork而来的那个。

git remote add upstream https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git

3.确认新加的 upstream 库

git remote -v
origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)
upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (fetch)
upstream  https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git (push)

4.获取 upstream 的master内容,该内容会被存在本地的 upstream/master分支

git fetch upstream
remote: Counting objects: 75, done.
remote: Compressing objects: 100% (53/53), done.
remote: Total 62 (delta 27), reused 44 (delta 9)
Unpacking objects: 100% (62/62), done.
From https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY
 * [new branch]      master     -> upstream/master

5.切换到本地master分支

git checkout master
Switched to branch 'master'

6.合并从upstream/master来的变化到本地master分支,这会将fork的master的内容同步到你本地,你本地也不会丢失内容。

git merge upstream/master
Updating a422352..5fdff0f
Fast-forward
 README                    |    9 -------
 README.md                 |    7 ++++++
 2 files changed, 7 insertions(+), 9 deletions(-)
 delete mode 100644 README
 create mode 100644 README.md

如果你本地没有改变的话,git会为你进行"fast-forward"合并

git merge upstream/master
Updating 34e91da..16c56ad
Fast-forward
 README.md                 |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

7.如果你想更新到你的git上去,只要提交就好了。

git push origin master