在 Git 中检出新分支后，有没有办法触发钩子？
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Is there a way to trigger a hook after a new branch has been checked out in Git?
提问by Rob Watson
Is there a way to trigger a hook after a new branch has been checked out in Git?
在 Git 中检出新分支后，有没有办法触发钩子？
采纳答案by SpliFF
If one of these hooks won't do it I'd be amazed:
如果这些钩子之一不这样做，我会感到惊讶：
https://schacon.github.io/git/githooks.html
https://schacon.github.io/git/githooks.html
Maybe this one:
也许这个：
post-checkout
This hook is invoked when a git-checkout is run after having updated the worktree. The hook is given three parameters: the ref of the previous HEAD, the ref of the new HEAD (which may or may not have changed), and a flag indicating whether the checkout was a branch checkout (changing branches, flag=1) or a file checkout (retrieving a file from the index, flag=0). This hook cannot affect the outcome of git-checkout.
结帐后
在更新工作树后运行 git-checkout 时会调用此钩子。钩子被赋予三个参数：前一个 HEAD 的 ref，新 HEAD 的 ref（可能已经改变也可能没有改变），以及一个指示结帐是否是分支结帐的标志（改变分支，标志=1）或文件检出（从索引中检索文件，flag=0）。这个钩子不会影响 git-checkout 的结果。
回答by givanse
A git hook is a script placed in a special location of your repository, that location is:
git hook 是放置在存储库特殊位置的脚本，该位置是：
.git/hooks
.git/钩子
The script can be any kind that you can execute in your environment i.e. bash, python, ruby etc.
脚本可以是您可以在您的环境中执行的任何类型，即 bash、python、ruby 等。
The hook that is executed after a checkout is post-checkout. From the docs:
结帐后执行的钩子是post-checkout。从文档：
...The hook is given three parameters...
...钩子被赋予三个参数...
Example:
例子：
Create the hook (script):
touch .git/hooks/post-checkout chmod u+x .git/hooks/post-checkoutHook sample content:
创建钩子（脚本）：
touch .git/hooks/post-checkout chmod u+x .git/hooks/post-checkout钩子示例内容：
#!/bin/bash
set -e
printf '\npost-checkout hook\n\n'
prevHEAD=
newHEAD=
checkoutType=
[[ $checkoutType == 1 ]] && checkoutType='branch' ||
checkoutType='file' ;
echo 'Checkout type: '$checkoutType
echo ' prev HEAD: '`git name-rev --name-only $prevHEAD`
echo ' new HEAD: '`git name-rev --name-only $newHEAD`
Note: The shebang in the first line indicates the type of script.
注意：第一行的shebang表示脚本的类型。
This script (git hook) will only capture the three parameters passed and print them in a human-friendly format.
这个脚本（git hook）只会捕获传递的三个参数并以人性化的格式打印它们。
回答by Justin Tilson
Similar to others but verifies that the branch has been checked out once.
与其他类似，但验证分支是否已签出一次。
#!/bin/bash
# this is a file checkout – do nothing
if [ "" == "0" ]; then exit; fi
BRANCH_NAME=$(git symbolic-ref --short -q HEAD)
NUM_CHECKOUTS=`git reflog --date=local | grep -o ${BRANCH_NAME} | wc -l`
#if the refs of the previous and new heads are the same
#AND the number of checkouts equals one, a new branch has been created
if [ "" == "" ] && [ ${NUM_CHECKOUTS} -eq 1 ]; then
git push origin ${BRANCH_NAME}
fi
回答by Steve Bennett
The post-checkouthookreceives three parameters:
该post-checkout钩接收三个参数：
- Ref of previous HEAD
- Ref of new HEAD
- Whether this is a file checkout (
0) or branch checkout (1)
- 参考以前的 HEAD
- 新 HEAD 的参考
- 这是文件检出 (
0) 还是分支检出 (1)
You can use the fact that a branch created from the current HEAD will have the same value for parameters 1 and 2.
您可以使用这样一个事实，即从当前 HEAD 创建的分支对于参数 1 和 2 具有相同的值。
cat > .git/hooks/post-checkout <<"EOF"
if [ "" == "0" ]; then exit; fi
if [ "" == "" ]; then
echo "New branch created. (Probably)."
fi
EOF
chmod u+x .git/hooks/post-checkout
Limitations:
限制：
- Checking out an existing branch which happens to be at the same HEAD as the current HEAD will fool it.
- Creating a new branch notfrom the current HEAD will not be detected.
- 检查与当前 HEAD 位于同一 HEAD 的现有分支将愚弄它。
- 不会检测到不是从当前 HEAD创建的新分支。
