How to to override repository-specific attributes in.git/config?

Hi,

Do we currently have a native way to override attributes specified in the repository-specific .git/config ?

While working with a large project which is composed by multiple repositories, from time to time, I'd like to override *some* attributes without modifying each of the repository-specific config files.

For example, when such a project was copied or moved from a window file system, all files got filemode changed. Even worse, their are many uncommitted changes! In this case, I'd like to filter out the filemode changes(with core.filemode=false) when review the uncommitted changes. Since the core.filemode attribute was specified in the repository-specific config, modifying the ~/.gitconfig does not help.

The aforementioned situation is not the only case that I'd like to have such function. Do we currently have a native way to solve this? For example, to provide an extra config file via environment variable or directly feed the attributes via environment variable to override only *some* but not *all* of attributes specified in the repository-specific config.

I found this thread "Introduce the GIT_CONFIG_EXTRA environment variable" initiated by Miklos Vajna, did provide a solution to my problem, which is complete different use case though. :-) So I initiate another thread to discuss the use case here.

Thanks.

Roy