Allow the use of site-local absolute URLs in external links

External links with no protocol that start with a forward-slash are
interpreted as being links to a file in the generated site. To make
these work with the relative-paths paradigm of the generator, the slash
is replaced with the page path-to-root to convert it to a relative path.

This commit also fixes an issue where unlabelled links with no protocol
were being given an empty label.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/generate_html.rs b/src/generate_html.rs
index d6624b8..3486352 100644
--- a/src/generate_html.rs
+++ b/src/generate_html.rs
@@ -281,9 +281,18 @@ fn line_to_html(line: &Line, page: &Page, website: &Website) -> String {
                 let mut label = label.to_string();
                 // Strip the protocol from the path when using the path as a label.
                 if label.is_empty() {
+                    label = path.to_string();
                     for protocol in ["mailto://", "http://", "https://"] {
                         if let Some(stripped) = path.strip_prefix(protocol) {
-                            label = stripped.to_string(); } } }
+                            label = stripped.to_string();
+                        }
+                    }
+                }
+                // Support absolute local paths.
+                let path = match path.strip_prefix('/') {
+                    Some(stripped) => format!("{}{stripped}", page.root()),
+                    None => path.to_string(),
+                };
                 let label = sanitize_text(&label);
                 html.push_str(&format!("<a href='{path}' class='external'>{label}</a>"));
             }