當沒有更新時Git運行服務器端鉤子

Question

我有一個服務器端鉤子（更新後），將在每次代碼推送後運行。即使沒有新的更改推送，是否有任何方法（或者可能是另一個鉤子？）來運行它？

例子：

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

我想它再次運行。那可能嗎？

Answer 1

創建一個pre-receive掛鉤，使其成爲exit 1，並從客戶端git push origin master HEAD:non-existing-branch。這將觸發pre-receive掛鉤，即使沒有更改爲master。

爲了避免錯誤信息，使成功地pre-receive鉤出口（exit 0），以及手動從post-receive鉤卸下的non-existing-branch。但是，這會創建一個很小的時間窗口（當文件non-existing-branch存在時），而從另一個客戶端發起的git push ...將不會運行掛接。

Answer 2

非常感謝@pts的回答（今天用我所有的票，不能馬上upvote :)）;對於那些（像我）有一個小問題，瞭解它的功能完全相同，這裏是一個簡單的命令行日誌，展示瞭如何使用的non-existing-branch觸發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' 

這裏，爲當地的工作，一切按預期工作與變量;但顯然，如果您的遠程回購是在服務器等後面，可能會出現問題，以查看變量如何/在哪裏結束 - 因此，僅調試該方面將非常有用，而無需對文件進行更改+ git add/commit/push每一次，只是爲了觸發腳本。