git pre-commit hook，将文件添加到索引中 [英] git pre-commit hook, add file into index

问题描述

我试图编写一个简单的pre-commit钩子来检查文件是否被修改，如果是这样，压缩它并将其添加到当前索引中，像这样

 ＃！/ bin / sh 
 
＃是否修改了文件？ 
 mf ='git status | grep jquery.detectBrowser.js'
 
＃是暂存区中的非压缩文件吗？ 
 if [$ mf！=] 
然后
＃提醒用户
 echoJavascript文件已修改，YUI Compressor将立即开始。 
 $ b $转到犀牛
 cd $ HOME / apps / rhino / yuicompressor-2.4.7 / build 
 
＃压缩我的文件
 java -jar yuicompressor-2.4.7.jar〜/ www / jquery.detectBrowser.js / jquery.detectBrowser.js -o〜/ www / jquery.detectBrowser.js / jquery.detectBrowser.min.js 
 
＃回到初始目录
 cd  -  
 
＃将新文件添加到索引
 git add〜/ www / jquery.detectBrowser.js / jquery.detectBrowser.min.js 
 fi 
  

我有两个问题，1我的条件是失败的，每次我必须有一个错字或类似的东西，但我无法弄清楚它是什么？这是我回来的错误：

  [：23：git：unexpected operator 
  

我的第二个问题是，即使我删除了该条件，该文件从未实际添加到提交中，但它已被修改，但从未添加过。

谢谢，
Leo

解决方案

'不要引用 $ mf 。将其更改为$ mf。虽然也许有更好的方法比输入一个人类可读的命令更好......例如，你可以看看 git status --porcelain 。甚至是 git diff --cached< path> ，然后检查退出代码，例如：

  if！ git diff --quiet --cached< path>;然后
＃文件被修改;做东西
 fi 
  

我认为Amber可能误导了你：你 / em>使用 - cached ，因为如果更改没有被执行，那么就这个提交而言，没有改变，所以我假设你没有想做别的事。

当然，我不知道你的项目，但我不确定你为什么要这样做 - 通常你不希望检查机器生成的内容，只需轻松地从检入内容进行重建即可。

至于最后一个问题，文件被修改但没有添加到提交，我不能用玩具的例子来重现它。我做了一个预先提交的钩子：

 ＃！/ bin / bash 
 touch z 
 git add z 
  

并进行了提交，并且z按照预期创建，添加和提交。 / p>

I'm trying to write a simple pre-commit hook to check if a file was modified, if so, compress it and add it into the current index, something like this

#!/bin/sh                                                                                                                                                    

# was the file modified?
mf='git status | grep jquery.detectBrowser.js'

# is the non-compressed file in the staging area?
if [ $mf != "" ]
then
  # alert the user
  echo "Javascript file modified, YUI Compressor will begin now."

  # go to rhino
  cd $HOME/apps/rhino/yuicompressor-2.4.7/build

  # compress my file
  java -jar yuicompressor-2.4.7.jar ~/www/jquery.detectBrowser.js/jquery.detectBrowser.js -o ~/www/jquery.detectBrowser.js/jquery.detectBrowser.min.js

  # comeback to the initial directory
  cd -

  # add the new file into the index
  git add ~/www/jquery.detectBrowser.js/jquery.detectBrowser.min.js
fi

I have 2 issues, 1 my condition is failing, every time, I must have a typo or something like that, but I can't figure out what it is? This is the error I get back:

[: 23: git: unexpected operator

And my second problem is that even if I remove the condition the file is never actually ADDED into the commit, it's modified, but never ADDED.

Thanks, Leo

解决方案

Your error is because you're not quoting $mf. Change it to "$mf". Though there are perhaps better ways than grepping the output of a human-readable command... you could have a look at git status --porcelain for example. Or even git diff --cached <path>, and just examine the exit code, e.g.:

if ! git diff --quiet --cached <path>; then
     # the file was modified; do stuff
fi

I think Amber may have misled you: you should use --cached, because if the changes are not staged, then as far as this commit is concerned, there are no changes, so I assume you don't want to do anything else.

And of course, I don't know your project, but I'm not sure why you're doing something like this - usually you don't want to check in machine-generated content, just make it easy to rebuild from what is checked in.

As for your last problem, the file being modified but not added to the commit, I can't reproduce it with a toy example. I made this as a pre-commit hook:

#!/bin/bash
touch z
git add z

and made a commit, and z was as expected created, added, and committed.

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