This script to updates Git and SVN repos (i.e. git pull & svn up) checked out in the same directory. This is primarily intended for WordPress Core development, specifically for these two repos:

Git: https://github.com/WordPress/wordpress-develop.git
SVN: https://develop.svn.wordpress.org/trunk/

Pass a branch name like 6.8 as the sole argument to check out that branch:

git svn-up 6.8

Or a feature branch:

git svn-up trac-1234

Otherwise, trunk is checked out if omitted:

git svn-up

This script was originally developed in the GoogleChromeLabs/wordpressdev repo but was split into a separate repo via git-filter-repo.

Check out Felix Arntz's writeup: My WordPress Core Contribution Workflow.

Installation

sudo wget -O /usr/local/bin/svn-git-up https://raw.githubusercontent.com/westonruter/svn-git-up/refs/heads/main/svn-git-up
sudo chmod +x /usr/local/bin/svn-git-up
git config --global alias.svn-up '!svn-git-up $1'

Repo Setup

Make a working directory and enter it:

mkdir wordpress-develop && cd wordpress-develop

Clone the Git repo:

git clone https://github.com/WordPress/wordpress-develop.git .

Check out the SVN repo:

svn co https://develop.svn.wordpress.org/trunk/ /tmp/wp-svn
mv /tmp/wp-svn/.svn .

Add a remote for your and set it as the origin remote for pushing:

git remote add westonruter https://github.com/westonruter/wordpress-develop.git
git remote set-url --push origin https://github.com/westonruter/wordpress-develop.git