用于“git远程更新”的本地git钩子？ [英] local git hook for "git remote update"?

问题描述

我有一个本地的git仓库，用以下方式创建：

  git clone --mirror git：//github.com/ < user> /< project> .git 
  

偶尔的更改会被推送到github上，机器会将它们拉到：

  git remote update --prune 
  

这一切都正常，但更新后，我想运行一个钩子，但我不确定要运行哪个钩子。我已经尝试过post-receive和post-merge，但是在更新后似乎都没有执行。在这两种情况下，钩子文件的内容都是：

 ＃！/ bin / sh 
 echo foo> foo.log 
  

当我通过bash.exe从命令行运行它们时（是的，在Windows ），创建了一个foo.log文件，这样的工作。但git远程更新的结果没有任何反应。在每个git远程更新之间，我推送一个无用的更改，以确保有一些东西需要解压。

解决方案

这通过制作一个bash脚本来包装git remote update命令。脚本在更新之前和之后查看所有refspecs，然后使用与git会缺少的功能相同的方式调用更新后的挂钩。感谢 @torek 和 @请注意：此脚本使用bash关联数组，这些数组仅在bash版本> = 4.0中可用。

 ＃！/ bin / bash 
 
 git_dir = $（git rev-parse --git- dir）||退出
 cd$ git_dir
 
声明-A之前全部
 
＃创建'before'列表
 while read commit_hash refspec;在[$ refspec] =$ commit_hash之前做
 
全部[$ refspec] =''
完成< <（git show-ref  -  heads）
 
＃进行远程更新
 git remote update --prune 
 
＃创建'after'列表
读取commit_hash时refspec;在[$ refspec] =$ commit_hash
 all [$ refspec] =''
完成后执行
< <（git show-ref  -  heads）
 
＃查看是否有任何更改，如果有，请运行post-receive hook 
 changes = 0 
 for refspec在$ {！all [@]}中;做
 [$ {before [$ refspec]}！=$ {after [$ refspec]}]&& {changes = 1;打破; } 
完成
 
 if [$ changes==1];那么
 none =$（printf％0.s0{1..40}）＃四十零或git的不关心ref 
在$ {！all [@]};做
＃如果refspec改变了，把它传递给post-receive hook 
 [$ {before [$ refspec]}！=$ {after [$ refspec]}]&& amp ; \ 
 echo$ {before {$ refspec]： -  $ none} $ {after [$ refspec]： -  $ none} $ refspec
 done |挂钩/收到后
 fi 
  

I have a local git repository, created with:

git clone --mirror git://github.com/<user>/<project>.git

Occasionally changes will get pushed to github, and this machine will pull them with:

git remote update --prune

This all works fine, but after the update, I want to run a hook, and I'm not sure which to run. I have tried "post-receive" and "post-merge", but neither seems to execute after the update. In both cases, the contents of the hook file are:

#!/bin/sh 
echo foo > foo.log

When I run them from the command-line via bash.exe (yes, on Windows), a foo.log file is created, so that works. But nothing happens as a result of the "git remote update". Between each "git remote update" I am pushing a useless change to make sure there's something to pull.

解决方案

I ended up solving this by making a little bash script to wrap the "git remote update" command. The script looks at all refspecs before and after the update, then calls the post-update hook in the same way that git would if it had the missing feature. Credit to @torek and @larsks for the idea in their comments to the original question.

Note: this script uses bash associative arrays which are only available in bash versions >= 4.0.

#!/bin/bash

git_dir=$(git rev-parse --git-dir) || exit
cd "$git_dir"

declare -A before after all

# create the 'before' list
while read commit_hash refspec; do
  before[$refspec]="$commit_hash"
  all[$refspec]=''
done < <(git show-ref --heads)

# do the remote update
git remote update --prune

# create the 'after' list
while read commit_hash refspec; do
  after[$refspec]="$commit_hash"
  all[$refspec]=''
done < <(git show-ref --heads)

# see if there were any changes, and if so, run the post-receive hook
changes=0
for refspec in "${!all[@]}"; do
  [ "${before[$refspec]}" != "${after[$refspec]}" ] && { changes=1; break; }
done

if [ "$changes" == "1" ]; then
  none="$(printf "%0.s0" {1..40})" # forty zeroes, or git's "don't care" ref
  for refspec in "${!all[@]}"; do
    # if the refspec changed, pass it to the post-receive hook
    [ "${before[$refspec]}" != "${after[$refspec]}" ] && \
      echo "${before[$refspec]:-$none} ${after[$refspec]:-$none} $refspec"
  done | hooks/post-receive
fi

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