Add a Github Plugin to the WordPress.org Repository

# Checkout the repository from .org (must use “https”!)
svn co https://plugins.svn.wordpress.org/sewn-in-xml-sitemap .
# Change directory to the trunk
cd trunk

# Clone the plugin files from Github
git clone git@github.com:jupitercow/sewn-in-xml-sitemap.git .

# Change back to parent directory
cd ../

# Check the SVN status, you will see git files listed, we need them to not be seen by SVN
svn status

# Add SVN ignores to keep GIT out of your SVN repo on .org, the line break after .git is important
svn propset svn:ignore '.git
.gitignore
README.md' trunk

# Add this content to a ".gitignore" file to keep SVN out of your repo on Github
*~
.DS_Store
.svn
.cvs
*.bak
*.swp
Thumbs.db
/.DS_Store
/.svn

# Add everything to the SVN repo
svn add * --force

# Remove things if something went wrong
svn revert [filename]

# Create a tag to get started
svn copy trunk tags/1.0.4

# Commit the SVN where the username and password are from http://wordpress.org/plugins/
svn --username [username] --password [password] commit -m 'initial commit'