Git: Testing Someone Else’s Pull Request on your local dev machine

You do not have to clone every developer’s fork or repository  and then checkout their respective branch in order to test the pull request locally on your dev box 😉

This tutorial will show you how to checkout a pull request on your own computer. This can be very helpful when you want to find bugs and test out new features before they get merged into the main project.

That gist does describe the config changes required in .git/config of the project.

Basically you need to add this line in config

fetch = +refs/pull/*/head:refs/remotes/origin/pr/*

which will allow you to checkout pr locally

Obviously, change the github url to match your project’s URL. It ends up looking like this:

[remote "origin"]
    fetch = +refs/heads/*:refs/remotes/origin/*
    url = git@github.com:joyent/node.git
    fetch = +refs/pull/*/head:refs/remotes/origin/pr/*

Now fetch all the pull requests:

$ git fetch origin
From github.com:joyent/node
 * [new ref]         refs/pull/1000/head -> origin/pr/1000
 * [new ref]         refs/pull/1002/head -> origin/pr/1002
 * [new ref]         refs/pull/1004/head -> origin/pr/1004
 * [new ref]         refs/pull/1009/head -> origin/pr/1009
...

To check out a particular pull request:

$git checkout <pr-id>

$ git checkout pr/999
Branch pr/999 set up to track remote branch pr/999 from origin.
Switched to a new branch 'pr/999'
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