覆盖.gitconfig用户文件中的git config --system（git config --global） [英] override git config --system in .gitconfig user file ( git config --global )

问题描述

我在系统配置文件中拥有该文件（但它也可以包含在 git config include.path =/ path / to / defaultconfig中）我想重置以前设置的一些值。特别是，默认配置文件包含 diff.external = git-diff-wrapper

em>在他/她的全局和本地设置中覆盖一个配置值。

但是没有简单的方法可以在较低配置中停用一项设置文件。

甚至将它设置为通常会产生意想不到的后果。非常话题已于2010年4月进行了讨论。

例如，取消激活发送电子邮件选项：

应该纠正这个问题，使用没有值的unset是一个可怕的，可怕的黑客攻击。

git-send-email 应该被纠正为不仅检查是否存在值来自配置或命令行选项，但也是它是理智的（即如果我们说
smtpuser =0不是我们需要担心支持的话）。

对于任何设置都是如此： diff.c＃run_diff_cmd（） 函数会尝试运行一个外部diff如果它检测到了和 diff.external ）。

  if （！strcmp（var，diff.external））
 return git_config_string（& external_diff_cmd_cfg，var，value）; 
  

导致：

  if（pgm）{
 run_external_diff（pgm，name，other，one，two，xfrm_msg，
 complete_rewrite）; 
 return; 
 
 
 
 
 
 $ b 
所以没有简单的方法来阻止系统宽差异外部确保这些用户引用不同的git系统安装路径（意思是不同的系统设置）。
 
I have that file in a system wide configuration (but it can also be included with git config include.path="/path/to/defaultconfig" I would like to reset some values previously setted.

In particular, the default config file contains diff.external = git-diff-wrapper, and I would like to deactivate it for some user
解决方案
If it is a system wide config, each user can override a config value in his/her global and local settings.

But there is no easy way to "deactivate" a setting in a lower config file.

Even set it to "" generally has unintended consequences. That very topic was discussed in April 2010.

For instance, deactivating the send-email option:

  
True, after thinking a bit about this using no value to unset is a horrible, horrible hack.

  git-send-email should be corrected to not only check that there is value from config or command line option, but also that it is sane (i.e. non-empty, or simply true-ish if we say
  that smtpuser = "0" is not something we need to worry about supporting).
That would be true for any setting: the diff.c#run_diff_cmd() function will attempt to run an external diff if it has detected and diff.external value (even "").
if (!strcmp(var, "diff.external"))
  return git_config_string(&external_diff_cmd_cfg, var, value);
leads to:
if (pgm) {
  run_external_diff(pgm, name, other, one, two, xfrm_msg,
  complete_rewrite);
  return;
}
So there is no easy way to block a system wide diff external, except by making sure those users reference a different git system installation path (meaning a different system setting).

                        
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