Update docs for sitemap

CHANGELOG.md

@@ -8,6 +8,7 @@ a section
 - The table of content for a page/section is now only available as the `toc` variable when
 rendering it and not anymore on the `page`/`section` variable
 - Default directory for `load_data` is now the root of the site instead of the `content` directory
+- Change variable sent to the sitemap template, see documentation for details
 
 ### Other
 - Add support for content in multiple languages
@@ -17,6 +18,7 @@ rendering it and not anymore on the `page`/`section` variable
 - Add Dracula syntax highlighting theme
 - Fix using inline styles in headers
 - Fix sections with render=false being shown in sitemap
+- Sitemap is now split when there are more than 30 000  links in it
 
 
 ## 0.5.1 (2018-12-14)

components/site/src/lib.rs

@@ -881,7 +881,7 @@ impl Site {
         if total_number < sitemap_limit {
             // Create single sitemap
             let mut context = Context::new();
-            context.insert("sitemap_entries", &all_sitemap_entries);
+            context.insert("entries", &all_sitemap_entries);
             let sitemap = &render_template("sitemap.xml", &self.tera, context, &self.config.theme)?;
             create_file(&self.output_path.join("sitemap.xml"), sitemap)?;
             return Ok(())
@@ -891,7 +891,7 @@ impl Site {
         let mut sitemap_index = Vec::new();
         for (i, chunk) in all_sitemap_entries.chunks(sitemap_limit).enumerate() {
             let mut context = Context::new();
-            context.insert("sitemap_entries", &chunk);
+            context.insert("entries", &chunk);
             let sitemap = &render_template("sitemap.xml", &self.tera, context, &self.config.theme)?;
             let file_name = format!("sitemap{}.xml", i+1);
             create_file(&self.output_path.join(&file_name), sitemap)?;

components/templates/src/builtins/sitemap.xml

@@ -1,5 +1,5 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
-    {% for sitemap_entry in sitemap_entries %}
+    {% for sitemap_entry in entries %}
         <url>
             <loc>{{ sitemap_entry.permalink | safe }}</loc>
             {% if sitemap_entry.date %}

docs/content/documentation/templates/sitemap.md

@@ -6,20 +6,27 @@ weight = 60
 Zola will look for a `sitemap.xml` file in the `templates` directory or
 use the built-in one.
 
+If your site has more than 30 000 pages, it will automatically split
+the links into multiple sitemaps as recommended by [Google](https://support.google.com/webmasters/answer/183668?hl=en):
 
-The sitemap template gets four variables in addition of the config:
+> All formats limit a single sitemap to 50MB (uncompressed) and 50,000 URLs. 
+> If you have a larger file or more URLs, you will have to break your list into multiple sitemaps. 
+> You can optionally create a sitemap index file (a file that points to a list of sitemaps) and submit that single index file to Google.
 
-- `pages`: all pages of the site
-- `sections`: all sections of the site, including an index section
-- `tags`: links the tags page and individual tag page, empty if no tags
-- `categories`: links the categories page and individual category page, empty if no categories
+In such a case, Zola will use a template called `split_sitemap_index.xml` to render the index sitemap.
 
-As the sitemap only requires a link and an optional date for the `lastmod` field,
-all the variables above are arrays of `SitemapEntry` with the following type:
+
+The `sitemap.xml` template gets a single variable:
+
+- `entries`: all pages of the site, as a list of `SitemapEntry`
+
+A `SitemapEntry` has the following fields:
 
 ```ts
 permalink: String;
 date: String?;
 ```
 
-All `SitemapEntry` are sorted in each variable by their permalink.
+The `split_sitemap_index.xml` also gets a single variable:
+
+- `sitemaps`: a list of permalinks to the sitemaps