Is there any way to enable Github pages through the api? Not requesting a page build, I mean the initial enabling of the feature and pointing to a branch.
You just have to push content to the remote git repository.
You have to differentiate between a User-Page (username.github.io) and a Project-Page (username.github.io/projectname)
User-Page:
git clone https://github.com/username/username.github.io
cd username.github.io
echo "Hello World" > index.html
git add --all
git commit -m "Initial commit"
git push -u origin master
Project-Page:
git clone https://github.com/user/repository.git
cd repository
git branch gh-pages
git checkout gh-pages
echo "Hello World" > index.html
git add --all
git commit -m "Initial commit"
git push -u origin gh-pages
来源：https://stackoverflow.com/questions/48620366/programmatically-enable-github-pages-for-a-repository