Function derive_page_url 

pub fn derive_page_url(base_url: &str, relative_output_path: &str) -> String

Joins a site base_url and a page’s site-relative output path into the canonical absolute URL for that page.

Conventions (see module docs for the full table):

• a trailing slash on base_url is tolerated (no // is emitted);
• index.html at any depth collapses to the enclosing directory URL with a trailing slash — the pretty-URL form the Atom feed (src/plugins/postprocess/atom.rs) already publishes;
• \ separators are normalised to / (Windows builds);
• leading ./ / / on the relative path are ignored;
• percent-encoding is passed through as-is.

Examples

use ssg::urls::derive_page_url;

// Root page.
assert_eq!(
    derive_page_url("https://example.com", "index.html"),
    "https://example.com/"
);
// Pretty directory URL for a nested page.
assert_eq!(
    derive_page_url("https://example.com/", "posts/foo/index.html"),
    "https://example.com/posts/foo/"
);
// Non-index outputs keep their file name.
assert_eq!(
    derive_page_url("https://example.com", "feed.xml"),
    "https://example.com/feed.xml"
);