git push -u 是什么意思？
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What does git push -u mean?
提问by Frankie Ribery
I have two different versions of git.
In the 1.6.2 version, git pushdoes not have the -uoption. It only appears in the 1.7.x version.
我有两个不同版本的 git。在1.6.2版本中，git push没有该-u选项。它只出现在 1.7.x 版本中。
From the docs, the -uis related to the variable
从文档中，-u与变量有关
branch.<name>.merge
in git config. This variable is described below:
在git config。该变量描述如下：
Defines, together with branch.<name>.remote, the upstream branch
for the given branch. It tells git fetch/git pull which branch to merge.
What is an upstream branch ?
什么是上游分支？
回答by Rafe Kettler
"Upstream" would refer to the main repo that other people will be pulling from, e.g. your GitHub repo. The -u option automatically sets that upstream for you, linking your repo to a central one. That way, in the future, Git "knows" where you want to push to and where you want to pull from, so you can use git pullor git pushwithout arguments. A little bit down, this articleexplains and demonstrates this concept.
“上游”指的是其他人将从中提取的主要存储库，例如您的 GitHub 存储库。-u 选项会自动为您设置上游，将您的存储库链接到中央存储库。这样，在未来，Git 会“知道”你想推到哪里以及从哪里拉，所以你可以使用git pull或git push不使用参数。稍微往下，这篇文章解释并演示了这个概念。
回答by Peter Piper
This is no longer up-to-date!
这已经不是最新的了！
Push.default is unset; its implicit value has changed in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the traditional behavior, use:
git config --global push.default matching
To squelch this message and adopt the new behavior now, use:
git config --global push.default simple
When push.default is set to 'matching', git will push local branches
to the remote branches that already exist with the same name.
Since Git 2.0, Git defaults to the more conservative 'simple'
behavior, which only pushes the current branch to the corresponding
remote branch that 'git pull' uses to update the current branch.
