git - 没有更新时 Git 运行服务器端钩子

Question

我有一个服务器端挂钩（更新后），它将在我每次推送代码后运行。即使没有要推送的新更改，是否有任何方法（或者可能是另一个钩子？）来运行它？

例子：

$ git push origin master
remote: Hook running....
$
$ git push origin master
Everything up-to-date
$

我希望它再次运行。那可能吗？

Answer 1

创建一个pre-receive钩子，制作它exit 1，并从客户端git push origin master HEAD:non-existing-branch。这将触发pre-receive钩子，即使master.

为避免错误消息，请让pre-receive钩子成功退出 ( exit 0)，然后手动non-existing-branch从post-receive钩子中删除 。但是，这会创建一个小的时间窗口（当文件non-existing-branch存在时），git push ...从另一个客户端启动不会运行挂钩。

Answer 2

非常感谢@pts的回答（今天使用了我所有的选票，不能立即投票:)）；对于那些（像我一样）在理解它的确切功能方面有一点问题的人，这里有一个简单的命令行日志，演示了non-existing-branchto trigger的用法pre-receive：

# create original repo:

$ cd /tmp
$ mkdir repotest_git
$ cd repotest_git/
$ git init
Initialized empty Git repository in /tmp/repotest_git/.git/
$ git config user.name "Your Name"
$ git config user.email you@example.com

# populate repo with 1 commit:

$ echo "test" > test.txt
$ git add test.txt
$ git commit -m "initial commit"
[master (root-commit) 2b60608] initial commit
 1 file changed, 1 insertion(+)
 create mode 100644 test.txt
$ 

# create remote "bare" repo; and add pre-receive hook there:

$ cd /tmp
$ git clone --bare repotest_git repotest-remote.git
Cloning into bare repository 'repotest-remote.git'...
done.
$ cd repotest-remote.git
$ 
$ cat > hooks/pre-receive <<"EOF"
#!/bin/sh
echo from pre-receive: HELLO_VAR [$HELLO_VAR]
exit 1
EOF
$ chmod +x hooks/pre-receive

# go back to original repo, add a remote reference
# to the newly created remote "bare" repo; update with pull:

$ cd /tmp
$ cd repotest_git
$ git remote add origin file:///tmp/repotest-remote.git
$ git pull origin master
From file:///tmp/repotest-remote
 * branch            master     -> FETCH_HEAD
Already up-to-date.

# try testing the hook script;
# since we don't have any changes, Everything is 
# up-to-date, and the pre-receive won't trigger:

$ git push
Everything up-to-date

# try testing with HEAD:non-existing-branch
# pre-receive gets triggered - and 
# we can see variable is not there:

$ git push origin master HEAD:non-existing-branch
Total 0 (delta 0), reused 0 (delta 0)
remote: from pre-receive: HELLO_VAR []
To file:///tmp/repotest-remote.git
 ! [remote rejected] HEAD -> non-existing-branch (pre-receive hook declined)
error: failed to push some refs to 'file:///tmp/repotest-remote.git'

# try testing again, this time specify 
# env. variable on command line....
# pre-receive gets triggered - and 
# we can see variable is there:

$ HELLO_VAR=hello git push origin master HEAD:non-existing-branch
Total 0 (delta 0), reused 0 (delta 0)
remote: from pre-receive: HELLO_VAR [hello]
To file:///tmp/repotest-remote.git
 ! [remote rejected] HEAD -> non-existing-branch (pre-receive hook declined)
error: failed to push some refs to 'file:///tmp/repotest-remote.git'

在这里，对于本地工作，一切都按预期使用变量；但是，显然，如果您的远程存储库位于服务器等后面，那么查看变量的结束方式/位置可能会出现问题 - 因此仅调试该方面非常有用，而不必每次都对文件进行更改 + git add/ commit/ push，只是为了触发脚本。