Mixing professional and personal git configurations

Many developers publish code in 2 different contexts:

Most of the time this means two different e-mails. So how can you manage your git configuration to help you distinguish these two environments ?

The template directory

When you both initialize or clone a repository, git accepts a special option: a template directory via the --template option.

A template directory contains files and directories that will be copied in the .git of your repository.

Among these files there is the config file which can tells git who you are and what is your e-mail address.

This way, you can "override" your default git configuration by using the --template option.

Creating a basic template directory

Creating a basic template directory is simple. First you have to generate a valid .git directory:

$ cd /path/to/your/template
$ git init --bare

So what did we do here ? For the moment we just created a bare repository. We need to remove the useless parts:

$ cd /path/to/your/template
$ rm objects refs HEAD -r

Here we remove the objects and refs directories as we don't want git objects in our template directory. We do the same with the HEAD file.

Now you can modify the config file in order to set another e-mail:

# /path/to/your/template/config
[user]
    name  = Romain Gauthier
    email = myfancyemail@fancyland.com

Using the template

So you have a proper template directory. How to use it? To do so, just use the --template option:

$ cd /path/to/my/uberproject
$ git init --template=/path/to/your/template

or

$ git clone --template=/path/to/your/template git://github.com/antirez/redis.git

And you're done.

However, this can be tedious to use the option constantly and think whether or not to use it. To make your life easier you can use the GIT_TEMPLATE_DIR environment variable. But don't forget you have to set it only when you want to change of context.

As I'm working with ruby very often, I already have rvm installed so I can benefit of the .rvmrc files. These files are script launched automatically when entering a directory. Thus I have a special .rvmrc for my professional directory:

$ cat /home/romain/af83/.rvmrc
export GIT_TEMPLATE_DIR=/home/romain/af83/git-templates

If you don't want to use rvm just for this task (which is something I can understand) you will have to find out another solution.