为什么不设置GIT_WORK_TREE在post-commit钩子中工作？ [英] Why doesn't setting GIT_WORK_TREE work in a post-commit hook?

问题描述

我试图在每次成功提交后使用以下 post-commit 钩子部署到特定目录：

 ＃！/ bin / sh 
 export GIT_WORK_TREE = / var / www / example / 
 export GIT_DIR = / home / mark / test / .git / 
 git checkout -f 
  

但是，提交后出现以下错误：

  $ git commit -m'提交示例'
致命：无法创建'/ var / www / example /。 git / index.lock'：没有这样的文件或目录
 [master 0938e48]示例提交。 
  

...好像 GIT_WORK_TREE 设置正在被忽略。为什么设置这个环境变量似乎不起作用？我使用的是git 1.7.4.1版本。

解决方案

这里的问题是在 post-commit 钩子（还有
pre-commit ， prepare-commit-msg 和 commit-msgt ）
GIT_INDEX_FILE 环境变量设置为 .git /索引。 （此
未在 githooks
文档中记录，但是我在其他地方发布了
关于设置环境变量和git
钩子中的
当前目录。）

$ b $ <<> c $ c> GIT_INDEX_FILE 环境变量在 git 手册页的ENVIRONMENT VARIABLES部分描述为
，如下所示：

GIT_INDEX_FILE

该环境[variable]允许指定备用索引文件。如果未指定，则使用缺省值 $ GIT_DIR / index 。

...出于某种原因，在这种情况下，相对于 GIT_WORK_TREE ，使用 GIT_INDEX_FILE 为
。

为了让钩子按照您的预期工作，您只需要取消设置
GIT_INDEX_FILE ，那么你的钩子看起来像：

 ＃！/ bin / sh 
 unset GIT_INDEX_FILE 
 export GIT_WORK_TREE = / var / www / example / 
 export GIT_DIR = / home / mark / test / .git / 
 git checkout -f 
  

I'm trying to use the following post-commit hook to deploy to a particular directory after each successful commit:

#!/bin/sh
export GIT_WORK_TREE=/var/www/example/
export GIT_DIR=/home/mark/test/.git/
git checkout -f

However, after committing I get the following error:

$ git commit -m 'An example commit.'
fatal: Unable to create '/var/www/example/.git/index.lock': No such file or directory
[master 0938e48] An example commit.

... as if the GIT_WORK_TREE setting is being ignored. Why does setting this environment variable appear to be not working? I'm using git version 1.7.4.1.

解决方案

The problem here is that in post-commit hooks (and also pre-commit, prepare-commit-msg and commit-msgt) the GIT_INDEX_FILE environment variable is set to .git/index. (This isn't documented in the githooks documentation, but I've posted elsewhere about the settings of environment variables and the current directory in git hooks.)

The effect of the GIT_INDEX_FILE environment variable is described in the ENVIRONMENT VARIABLES section of the git man page as:

GIT_INDEX_FILE

This environment [variable] allows the specification of an alternate index file. If not specified, the default of $GIT_DIR/index is used.

... and for some reason, in this situation, GIT_INDEX_FILE is being used relative to GIT_WORK_TREE.

To make the hook work as you would expect, you just need to unset GIT_INDEX_FILE, so your hook would look like:

 #!/bin/sh
 unset GIT_INDEX_FILE
 export GIT_WORK_TREE=/var/www/example/
 export GIT_DIR=/home/mark/test/.git/
 git checkout -f

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