The type for updates.

update ~follow_symlinks ~src dst is an update that given a relative path dst in the work tree that may not exist:

• If src is None, deletes dst in the work tree.
• If src is Some src replaces dst in the work tree by the contents of the file or file hierarchy src. If follow_symlinks is true (default) symbolic links are followed in src.

Use . for dst to denote the root of the work tree; for example update ~src:(Some dir) (Fpath.v ".") replaces the whole website by the file hierarchy rooted at dir.

nojekyll is update ~src:(Some Os.File.null) (Fpath.v ".nojekyll"). Add this to the updtaes to prevent the Jekyll processing that is automatically performed on GitHub pages.

default_branch is "gh-pages", GitHub's default publication branch for GitHub pages.

commit_updates vcs ~log ~remote ~branch ~msg us updates branch (defaults to gh-pages) on remote according to updates us with commit message msg. Ok false is returned if there was nothing to update.

• If amend is true, the last commit is amended (if any exists) and the author reset rather than a new commit added
• If force is true, the various git operations are forced.
• log indicates a logging level used to monitor progress (defaults to Log.app).
• If allow_hardlinks is true (default), updates are, if possible hard linked to the working directory rather than copied

More precisely this:

1. Fetches remote/branch if it exists.
2. Creates a transient checkout with a temporary workdir in Os.Dir.default_tmp and a branch called _b0-update-gh-pages reset to remote/branch.
3. Commits changes with message msg according to us which are applied in order, see update.
4. Destroys the transient checkout
5. Pushes _b0-update-gh-pages on remote/branch
6. Destroys the branch _b0-update-gh-pages

Warning. If you have paths that start with _ GitHub pages won't publish them. You can disable this by adding a .nojekyll file at the root the gh-page branch, see nojekyll.