Re: Overriding ~/.gitconfig using GIT_CONFIG

On Sun, 2011-08-28 at 06:05 -0700, David Aguilar wrote:

On Fri, Aug 12, 2011 at 09:44:13PM +0100, Richard Purdie wrote:

quoted

My problem isn't that I want to specify a specific .gitconfig file, I
just need it to ignore the one in $HOME. I'm happy for the .git/config
file to be used, in fact I need it to be.

If you're writing a tool then it should restrict itself to
git's plumbing commands.  You should be able to do just about
anything without needing to worry about differences in
configuraiton.  Git commands almost always provide a way to
override configuration through the use of flags.

The plumbing commands are listed in the main git manpage.
See "Low-level commands (plumbing)" here:
http://www.kernel.org/pub/software/scm/git/docs/

What is the specific problem solved by overriding the
configuration?  It may be possible to solve it without needing
to get too complicated.

I'm not sure writing my own porcelain makes sense in this case.

The tool in question is a build system which is primarily interested in
building software. Sometimes the software we want to build is "bleeding
edge" and hence rather than download tarballs, we want to interact
directly with SCMs like git to obtain it.

The commands I'm using are the likes of "git clone" and "git fetch"
although we do use commands listed under the plumbing section too such
as ls-remote and read-tree. We do "cache" checkouts and support
automatically noticing changes and updating/building.

What I do want to be able to say is "ignore whatever the user might have
put in their ~/.gitconfig file" since I've open bug reports about people
putting things in there that break builds.

The fetch/clone commands do what I need, apart from being influenced by
userconfig so reimplementing them myself doesn't seem like a good
approach.

Cheers,

Richard

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