Truncate-branch.md

Truncate gh-pages branch

The branch is going to expand as every commit will trigger new rebuild all websites static files.

We need to Truncate it periodically.

1. Check out to gh-pages and find the latest commit ID.

git checkout gh-pages
git pull <upstream> gh-pages
git log

2. Assume the commit ID is COMMIT_ID

git checkout --orphan temp COMMIT_ID
git commit -m "Truncate history"
git rebase --onto temp COMMIT_ID gh-pages

3. Force push the Truncated branch.

git push origin gh-pages -f