Synopsis

I sometimes need to push my git repository to multiple remotes — for example, when deploying to Heroku at the same time as pushing to GitHub.

Description

Adding the following to your .gitconfig will allow you to do just that with only one command:

[alias]
    pushto="!f(){ remotes=$(echo \"$1\" | tr \",\" \"\n\"); branches=$(echo \"$2\" | tr \",\" \"\n\"); for remote in $remotes; do for branch in $branches; do git push -v $remote $branch; done; done; };f"

Usage

git pushto <repositories> <branches>

Note that <repositories> and <branches> are both comma-delimited strings.

Examples

This following command pushes the master branch to both the origin and heroku remotes:

git pushto origin,heroku master

This following command pushes the specified branches (master and anotherbranch) to the specified remotes (origin and github):

git pushto origin,github master,anotherbranch

Explanation

If you're curious, here is the prettified version of the code.

remotes=$(echo "$1" | tr "," "\n")
branches=$(echo "$2" | tr "," "\n")

for remote in $remotes; do
    for branch in $branches; do
        git push -v $remote $branch
    done
done

Alternatives

A simpler, yet less flexible way to accomplish this would be to just add multiple URLs to one remote. For example:

git remote set-url --add origin git@github.com:example-user/example-repo.git

Then, whenever you git push origin, git will push to both the original origin URL and the URL that you specified in the command above.