Support and default to generating Atom feeds

This includes several breaking changes, but they’re easy to adjust for.

Atom 1.0 is superior to RSS 2.0 in a number of ways, both technical and
legal, though information from the last decade is hard to find.
http://www.intertwingly.net/wiki/pie/Rss20AndAtom10Compared
has some info which is probably still mostly correct.

How do RSS and Atom compare in terms of implementation support? The
impression I get is that proper Atom support in normal content websites
has been universal for over twelve years, but that support in podcasts
was not quite so good, but getting there, over twelve years ago. I have
no more recent facts or figures; no one talks about this stuff these
days. I remember investigating this stuff back in 2011–2013 and coming
to the same conclusion. At that time, I went with Atom on websites and
RSS in podcasts. Now I’d just go full Atom and hang any podcast tools
that don’t support Atom, because Atom’s semantics truly are much better.

In light of all this, I make the bold recommendation to default to Atom.

Nonetheless, for compatibility for existing users, and for those that
have Opinions, I’ve retained the RSS template, so that you can escape
the breaking change easily.

I personally prefer to give feeds a basename that doesn’t mention “Atom”
or “RSS”, e.g. “feed.xml”. I’ll be doing that myself, as I’ll be using
my own template with more Atom features anyway, like author information,
taxonomies and making the title field HTML.

Some notes about the Atom feed template:

- I went with atom.xml rather than something like feed.atom (the .atom
  file format being registered for this purpose by RFC4287) due to lack
  of confidence that it’ll be served with the right MIME type. .xml is a
  safer default.

- It might be nice to get Zola’s version number into the <generator>
  tag. Not for any particularly good reason, y’know. Just picture it:

    <generator uri="https://www.getzola.org/" version="0.10.0">
	Zola
    </generator>

- I’d like to get taxonomies into the feed, but this requires exposing a
  little more info than is currently exposed. I think it’d require
  `TaxonomyConfig` to preferably have a new member `permalink` added
  (which should be equivalent to something like `config.base_url ~ "/" ~
  taxonomy.slug ~ "/"`), and for the feed to get all the taxonomies
  passed into it (`taxonomies: HashMap<String, TaxonomyTerm>`).
  Then, the template could be like this, inside the entry:

    {% for taxonomy, terms in page.taxonomies %}
        {% for term in terms %}
            <category scheme="{{ taxonomies[taxonomy].permalink }}"
		term="{{ term.slug }}" label="{{ term.name }}" />
	{% endfor %}
    {% endfor %}

Other remarks:

- I have added a date field `extra.updated` to my posts and include that
  in the feed; I’ve observed others with a similar field. I believe this
  should be included as an official field. I’m inclined to add author to
  at least config.toml, too, for feeds.
- We need to have a link from the docs to the source of the built-in
  templates, to help people that wish to alter it.

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.11.0 (unreleased)
+
+### Breaking
+- RSS feed support has been altered to allow, *and default to*, Atom feeds, Atom being technically superior and just as widely-supported in normal use cases.
+  - New config value `feed_filename`, defaulting to `atom.xml` (change to `rss.xml` to reinstate the old behaviour)
+  - Config value `rss_limit` is renamed to `feed_limit`
+  - Config value `languages.*.rss` is renamed to `languages.*.feed`
+  - Config value `generate_rss` is renamed to `generate_feed`
+
+  Users with existing feeds should either set `feed_filename = "rss.xml"` in config.toml to keep things the same, or set up a 3xx redirect from rss.xml to atom.xml so that existing feed consumers aren’t broken.
+
 ## 0.10.2 (unreleased)
 
 - Fix link checker not looking for anchor with capital id/name
@@ -17,8 +28,6 @@
 ### Breaking
 - Remove `toc` variable in section/page context and pass it to `page.toc` and `section.toc` instead so they are
 accessible everywhere
-- [Slugification](https://en.wikipedia.org/wiki/Slug_(web_publishing)#Slug) of paths, taxonomies and anchors is now configurable. By default, everything will still be slugified like in previous versions.
-See documentation for information on how to disable it.
 
 ### Other
 - Add zenburn syntax highlighting theme

components/config/src/config.rs

@@ -47,15 +47,15 @@ impl Default for Slugify {
 pub struct Language {
     /// The language code
     pub code: String,
-    /// Whether to generate a RSS feed for that language, defaults to `false`
-    pub rss: bool,
+    /// Whether to generate a feed for that language, defaults to `false`
+    pub feed: bool,
     /// Whether to generate search index for that language, defaults to `false`
     pub search: bool,
 }
 
 impl Default for Language {
     fn default() -> Self {
-        Language { code: String::new(), rss: false, search: false }
+        Language { code: String::new(), feed: false, search: false }
     }
 }
 
@@ -68,8 +68,8 @@ pub struct Taxonomy {
     /// by this much
     pub paginate_by: Option<usize>,
     pub paginate_path: Option<String>,
-    /// Whether to generate a RSS feed only for each taxonomy term, defaults to false
-    pub rss: bool,
+    /// Whether to generate a feed only for each taxonomy term, defaults to false
+    pub feed: bool,
     /// The language for that taxonomy, only used in multilingual sites.
     /// Defaults to the config `default_language` if not set
     pub lang: String,
@@ -99,7 +99,7 @@ impl Default for Taxonomy {
             name: String::new(),
             paginate_by: None,
             paginate_path: None,
-            rss: false,
+            feed: false,
             lang: String::new(),
         }
     }
@@ -155,10 +155,13 @@ pub struct Config {
     /// Defaults to "base16-ocean-dark"
     pub highlight_theme: String,
 
-    /// Whether to generate RSS. Defaults to false
-    pub generate_rss: bool,
-    /// The number of articles to include in the RSS feed. Defaults to including all items.
-    pub rss_limit: Option<usize>,
+    /// Whether to generate a feed. Defaults to false.
+    pub generate_feed: bool,
+    /// The number of articles to include in the feed. Defaults to including all items.
+    pub feed_limit: Option<usize>,
+    /// The filename to use for feeds. Used to find the template, too.
+    /// Defaults to "atom.xml", with "rss.xml" also having a template provided out of the box.
+    pub feed_filename: String,
     /// If set, files from static/ will be hardlinked instead of copied to the output dir.
     pub hard_link_static: bool,
 
@@ -276,11 +279,12 @@ impl Config {
 
     /// Makes a url, taking into account that the base url might have a trailing slash
     pub fn make_permalink(&self, path: &str) -> String {
-        let trailing_bit = if path.ends_with('/') || path.ends_with("rss.xml") || path.is_empty() {
-            ""
-        } else {
-            "/"
-        };
+        let trailing_bit =
+            if path.ends_with('/') || path.ends_with(&self.feed_filename) || path.is_empty() {
+                ""
+            } else {
+                "/"
+            };
 
         // Index section with a base url that has a trailing slash
         if self.base_url.ends_with('/') && path == "/" {
@@ -384,8 +388,9 @@ impl Default for Config {
             highlight_theme: "base16-ocean-dark".to_string(),
             default_language: "en".to_string(),
             languages: Vec::new(),
-            generate_rss: false,
-            rss_limit: None,
+            generate_feed: false,
+            feed_limit: None,
+            feed_filename: "atom.xml".to_string(),
             hard_link_static: false,
             taxonomies: Vec::new(),
             compile_sass: false,
@@ -493,10 +498,10 @@ hello = "world"
 
     // https://github.com/Keats/gutenberg/issues/486
     #[test]
-    fn doesnt_add_trailing_slash_to_rss() {
+    fn doesnt_add_trailing_slash_to_feed() {
         let mut config = Config::default();
         config.base_url = "http://vincent.is/".to_string();
-        assert_eq!(config.make_permalink("rss.xml"), "http://vincent.is/rss.xml");
+        assert_eq!(config.make_permalink("atom.xml"), "http://vincent.is/atom.xml");
     }
 
     #[test]

components/library/src/content/file_info.rs

@@ -195,7 +195,7 @@ mod tests {
     #[test]
     fn can_find_valid_language_in_page() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let mut file = FileInfo::new_page(
             &Path::new("/home/vincent/code/site/content/posts/tutorials/python.fr.md"),
             &PathBuf::new(),
@@ -208,7 +208,7 @@ mod tests {
     #[test]
     fn can_find_valid_language_in_page_with_assets() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let mut file = FileInfo::new_page(
             &Path::new("/home/vincent/code/site/content/posts/tutorials/python/index.fr.md"),
             &PathBuf::new(),
@@ -234,7 +234,7 @@ mod tests {
     #[test]
     fn errors_on_unknown_language_in_page_with_i18n_on() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("it"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("it"), feed: false, search: false });
         let mut file = FileInfo::new_page(
             &Path::new("/home/vincent/code/site/content/posts/tutorials/python.fr.md"),
             &PathBuf::new(),
@@ -246,7 +246,7 @@ mod tests {
     #[test]
     fn can_find_valid_language_in_section() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let mut file = FileInfo::new_section(
             &Path::new("/home/vincent/code/site/content/posts/tutorials/_index.fr.md"),
             &PathBuf::new(),
@@ -273,7 +273,7 @@ mod tests {
     #[test]
     fn correct_canonical_after_find_language() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let mut file = FileInfo::new_page(
             &Path::new("/home/vincent/code/site/content/posts/tutorials/python/index.fr.md"),
             &PathBuf::new(),

components/library/src/content/page.rs

@@ -770,7 +770,7 @@ Hello world
     #[test]
     fn can_specify_language_in_filename() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 +++
@@ -787,7 +787,7 @@ Bonjour le monde"#
     #[test]
     fn can_specify_language_in_filename_with_date() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 +++
@@ -806,7 +806,7 @@ Bonjour le monde"#
     #[test]
     fn i18n_frontmatter_path_overrides_default_permalink() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 path = "bonjour"

components/library/src/content/section.rs

@@ -350,7 +350,7 @@ mod tests {
     #[test]
     fn can_specify_language_in_filename() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 +++
@@ -372,7 +372,7 @@ Bonjour le monde"#
     #[test]
     fn can_make_links_to_translated_sections_without_double_trailing_slash() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 +++
@@ -389,7 +389,7 @@ Bonjour le monde"#
     #[test]
     fn can_make_links_to_translated_subsections_with_trailing_slash() {
         let mut config = Config::default();
-        config.languages.push(Language { code: String::from("fr"), rss: false, search: false });
+        config.languages.push(Language { code: String::from("fr"), feed: false, search: false });
         let content = r#"
 +++
 +++

components/library/src/sorting.rs

@@ -6,7 +6,7 @@ use slotmap::DefaultKey;
 
 use crate::content::Page;
 
-/// Used by the RSS feed
+/// Used by the feed
 /// There to not have to import sorting stuff in the site crate
 #[allow(clippy::trivially_copy_pass_by_ref)]
 pub fn sort_actual_pages_by_date(a: &&Page, b: &&Page) -> Ordering {

components/library/src/taxonomies/mod.rs

@@ -458,7 +458,7 @@ mod tests {
     #[test]
     fn can_make_taxonomies_in_multiple_languages() {
         let mut config = Config::default();
-        config.languages.push(Language { rss: false, code: "fr".to_string(), search: false });
+        config.languages.push(Language { feed: false, code: "fr".to_string(), search: false });
         let mut library = Library::new(2, 0, true);
 
         config.taxonomies = vec![
@@ -569,7 +569,7 @@ mod tests {
         let mut config = Config::default();
         config.slugify.taxonomies = SlugifyStrategy::Safe;
         config.languages.push(Language {
-            rss: false,
+            feed: false,
             code: "fr".to_string(),
             ..Language::default()
         });
@@ -602,7 +602,7 @@ mod tests {
         let mut config = Config::default();
         config.slugify.taxonomies = SlugifyStrategy::On;
         config.languages.push(Language {
-            rss: false,
+            feed: false,
             code: "fr".to_string(),
             ..Language::default()
         });

components/rebuild/src/lib.rs

@@ -395,7 +395,9 @@ pub fn after_template_change(site: &mut Site, path: &Path) -> Result<()> {
 
     match filename {
         "sitemap.xml" => site.render_sitemap(),
-        "rss.xml" => site.render_rss_feed(site.library.read().unwrap().pages_values(), None),
+        filename if filename == site.config.feed_filename => {
+            site.render_feed(site.library.read().unwrap().pages_values(), None)
+        }
         "split_sitemap_index.xml" => site.render_sitemap(),
         "robots.txt" => site.render_robots(),
         "single.html" | "list.html" => site.render_taxonomies(),

components/site/benches/gen.py

@@ -108,7 +108,7 @@ base_url = "https://replace-this-with-your-url.com"
 theme = "sample"
 
 taxonomies = [
- {name = "tags", rss = true}, 
+ {name = "tags", feed = true}, 
  {name = "categories"}
 ]
 

components/site/benches/site.rs

@@ -35,12 +35,12 @@ fn bench_render_sitemap(b: &mut test::Bencher) {
 }
 
 #[bench]
-fn bench_render_rss_feed(b: &mut test::Bencher) {
+fn bench_render_feed(b: &mut test::Bencher) {
     let mut site = setup_site("big-blog");
     let tmp_dir = tempdir().expect("create temp dir");
     let public = &tmp_dir.path().join("public");
     site.set_output_path(&public);
-    b.iter(|| site.render_rss_feed(site.library.read().unwrap().pages_values(), None).unwrap());
+    b.iter(|| site.render_feed(site.library.read().unwrap().pages_values(), None).unwrap());
 }
 
 #[bench]

components/site/src/lib.rs

@@ -745,7 +745,7 @@ impl Site {
         self.render_sitemap()?;
 
         let library = self.library.read().unwrap();
-        if self.config.generate_rss {
+        if self.config.generate_feed {
             let pages = if self.config.is_multilingual() {
                 library
                     .pages_values()
@@ -756,16 +756,16 @@ impl Site {
             } else {
                 library.pages_values()
             };
-            self.render_rss_feed(pages, None)?;
+            self.render_feed(pages, None)?;
         }
 
         for lang in &self.config.languages {
-            if !lang.rss {
+            if !lang.feed {
                 continue;
             }
             let pages =
                 library.pages_values().iter().filter(|p| p.lang == lang.code).cloned().collect();
-            self.render_rss_feed(pages, Some(&PathBuf::from(lang.code.clone())))?;
+            self.render_feed(pages, Some(&PathBuf::from(lang.code.clone())))?;
         }
 
         self.render_404()?;
@@ -983,8 +983,8 @@ impl Site {
                     create_file(&path.join("index.html"), &self.inject_livereload(single_output))?;
                 }
 
-                if taxonomy.kind.rss {
-                    self.render_rss_feed(
+                if taxonomy.kind.feed {
+                    self.render_feed(
                         item.pages.iter().map(|p| library.get_page_by_key(*p)).collect(),
                         Some(&PathBuf::from(format!("{}/{}", taxonomy.kind.name, item.slug))),
                     )
@@ -1045,10 +1045,10 @@ impl Site {
         Ok(())
     }
 
-    /// Renders a RSS feed for the given path and at the given path
-    /// If both arguments are `None`, it will render only the RSS feed for the whole
+    /// Renders a feed for the given path and at the given path
+    /// If both arguments are `None`, it will render only the feed for the whole
     /// site at the root folder.
-    pub fn render_rss_feed(
+    pub fn render_feed(
         &self,
         all_pages: Vec<&Page>,
         base_path: Option<&PathBuf>,
@@ -1058,7 +1058,7 @@ impl Site {
         let mut context = Context::new();
         let mut pages = all_pages.into_iter().filter(|p| p.meta.date.is_some()).collect::<Vec<_>>();
 
-        // Don't generate a RSS feed if none of the pages has a date
+        // Don't generate a feed if none of the pages has a date
         if pages.is_empty() {
             return Ok(());
         }
@@ -1068,7 +1068,7 @@ impl Site {
         context.insert("last_build_date", &pages[0].meta.date.clone());
         let library = self.library.read().unwrap();
         // limit to the last n elements if the limit is set; otherwise use all.
-        let num_entries = self.config.rss_limit.unwrap_or_else(|| pages.len());
+        let num_entries = self.config.feed_limit.unwrap_or_else(|| pages.len());
         let p = pages
             .iter()
             .take(num_entries)
@@ -1078,15 +1078,21 @@ impl Site {
         context.insert("pages", &p);
         context.insert("config", &self.config);
 
-        let rss_feed_url = if let Some(ref base) = base_path {
-            self.config.make_permalink(&base.join("rss.xml").to_string_lossy().replace('\\', "/"))
+        let feed_filename = &self.config.feed_filename;
+        let feed_url = if let Some(ref base) = base_path {
+            self.config.make_permalink(
+                &base
+                    .join(feed_filename)
+                    .to_string_lossy()
+                    .replace('\\', "/"),
+            )
         } else {
-            self.config.make_permalink("rss.xml")
+            self.config.make_permalink(feed_filename)
         };
 
-        context.insert("feed_url", &rss_feed_url);
+        context.insert("feed_url", &feed_url);
 
-        let feed = &render_template("rss.xml", &self.tera, context, &self.config.theme)?;
+        let feed = &render_template(feed_filename, &self.tera, context, &self.config.theme)?;
 
         if let Some(ref base) = base_path {
             let mut output_path = self.output_path.clone();
@@ -1096,9 +1102,9 @@ impl Site {
                     create_directory(&output_path)?;
                 }
             }
-            create_file(&output_path.join("rss.xml"), feed)?;
+            create_file(&output_path.join(feed_filename), feed)?;
         } else {
-            create_file(&self.output_path.join("rss.xml"), feed)?;
+            create_file(&self.output_path.join(feed_filename), feed)?;
         }
         Ok(())
     }

components/site/tests/site.rs

@@ -152,7 +152,7 @@ fn can_build_site_without_live_reload() {
     // We do have categories
     assert_eq!(file_exists!(public, "categories/index.html"), true);
     assert_eq!(file_exists!(public, "categories/a-category/index.html"), true);
-    assert_eq!(file_exists!(public, "categories/a-category/rss.xml"), true);
+    assert_eq!(file_exists!(public, "categories/a-category/atom.xml"), true);
     // But no tags
     assert_eq!(file_exists!(public, "tags/index.html"), false);
 
@@ -232,7 +232,7 @@ fn can_build_site_with_live_reload_and_drafts() {
     // We do have categories
     assert_eq!(file_exists!(public, "categories/index.html"), true);
     assert_eq!(file_exists!(public, "categories/a-category/index.html"), true);
-    assert_eq!(file_exists!(public, "categories/a-category/rss.xml"), true);
+    assert_eq!(file_exists!(public, "categories/a-category/atom.xml"), true);
     // But no tags
     assert_eq!(file_exists!(public, "tags/index.html"), false);
 
@@ -294,11 +294,11 @@ fn can_build_site_with_taxonomies() {
     assert!(file_exists!(public, "categories/index.html"));
     assert!(file_exists!(public, "categories/a/index.html"));
     assert!(file_exists!(public, "categories/b/index.html"));
-    assert!(file_exists!(public, "categories/a/rss.xml"));
+    assert!(file_exists!(public, "categories/a/atom.xml"));
     assert!(file_contains!(
         public,
-        "categories/a/rss.xml",
-        "https://replace-this-with-your-url.com/categories/a/rss.xml"
+        "categories/a/atom.xml",
+        "https://replace-this-with-your-url.com/categories/a/atom.xml"
     ));
     // Extending from a theme works
     assert!(file_contains!(public, "categories/a/index.html", "EXTENDED"));
@@ -513,7 +513,7 @@ fn can_build_site_with_pagination_for_taxonomy() {
             name: "tags".to_string(),
             paginate_by: Some(2),
             paginate_path: None,
-            rss: true,
+            feed: true,
             lang: site.config.default_language.clone(),
         });
         site.load().unwrap();
@@ -547,9 +547,9 @@ fn can_build_site_with_pagination_for_taxonomy() {
 
     // Tags
     assert!(file_exists!(public, "tags/index.html"));
-    // With RSS
-    assert!(file_exists!(public, "tags/a/rss.xml"));
-    assert!(file_exists!(public, "tags/b/rss.xml"));
+    // With Atom
+    assert!(file_exists!(public, "tags/a/atom.xml"));
+    assert!(file_exists!(public, "tags/b/atom.xml"));
     // And pagination!
     assert!(file_exists!(public, "tags/a/page/1/index.html"));
     assert!(file_exists!(public, "tags/b/page/1/index.html"));
@@ -588,15 +588,15 @@ fn can_build_site_with_pagination_for_taxonomy() {
 }
 
 #[test]
-fn can_build_rss_feed() {
+fn can_build_feed() {
     let (_, _tmp_dir, public) = build_site("test_site");
 
     assert!(&public.exists());
-    assert!(file_exists!(public, "rss.xml"));
+    assert!(file_exists!(public, "atom.xml"));
     // latest article is posts/extra-syntax.md
-    assert!(file_contains!(public, "rss.xml", "Extra Syntax"));
+    assert!(file_contains!(public, "atom.xml", "Extra Syntax"));
     // Next is posts/simple.md
-    assert!(file_contains!(public, "rss.xml", "Simple article with shortcodes"));
+    assert!(file_contains!(public, "atom.xml", "Simple article with shortcodes"));
 }
 
 #[test]

components/site/tests/site_i18n.rs

@@ -115,15 +115,15 @@ fn can_build_multilingual_site() {
     assert!(file_contains!(public, "sitemap.xml", "https://example.com/fr/blog/something-else/"));
     assert!(file_contains!(public, "sitemap.xml", "https://example.com/it/blog/something-else/"));
 
-    // one rss per language
-    assert!(file_exists!(public, "rss.xml"));
-    assert!(file_contains!(public, "rss.xml", "https://example.com/blog/something-else/"));
-    assert!(!file_contains!(public, "rss.xml", "https://example.com/fr/blog/something-else/"));
-    assert!(file_exists!(public, "fr/rss.xml"));
-    assert!(!file_contains!(public, "fr/rss.xml", "https://example.com/blog/something-else/"));
-    assert!(file_contains!(public, "fr/rss.xml", "https://example.com/fr/blog/something-else/"));
-    // Italian doesn't have RSS enabled
-    assert!(!file_exists!(public, "it/rss.xml"));
+    // one feed per language
+    assert!(file_exists!(public, "atom.xml"));
+    assert!(file_contains!(public, "atom.xml", "https://example.com/blog/something-else/"));
+    assert!(!file_contains!(public, "atom.xml", "https://example.com/fr/blog/something-else/"));
+    assert!(file_exists!(public, "fr/atom.xml"));
+    assert!(!file_contains!(public, "fr/atom.xml", "https://example.com/blog/something-else/"));
+    assert!(file_contains!(public, "fr/atom.xml", "https://example.com/fr/blog/something-else/"));
+    // Italian doesn't have feed enabled
+    assert!(!file_exists!(public, "it/atom.xml"));
 
     // Taxonomies are per-language
     // English
@@ -131,7 +131,7 @@ fn can_build_multilingual_site() {
     assert!(file_contains!(public, "authors/index.html", "Queen"));
     assert!(!file_contains!(public, "authors/index.html", "Vincent"));
     assert!(!file_exists!(public, "auteurs/index.html"));
-    assert!(file_exists!(public, "authors/queen-elizabeth/rss.xml"));
+    assert!(file_exists!(public, "authors/queen-elizabeth/atom.xml"));
 
     assert!(file_exists!(public, "tags/index.html"));
     assert!(file_contains!(public, "tags/index.html", "hello"));
@@ -142,7 +142,7 @@ fn can_build_multilingual_site() {
     assert!(file_exists!(public, "fr/auteurs/index.html"));
     assert!(!file_contains!(public, "fr/auteurs/index.html", "Queen"));
     assert!(file_contains!(public, "fr/auteurs/index.html", "Vincent"));
-    assert!(!file_exists!(public, "fr/auteurs/vincent-prouillet/rss.xml"));
+    assert!(!file_exists!(public, "fr/auteurs/vincent-prouillet/atom.xml"));
 
     assert!(file_exists!(public, "fr/tags/index.html"));
     assert!(file_contains!(public, "fr/tags/index.html", "bonjour"));

components/templates/src/builtins/atom.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="{{ config.default_language }}">
+	<title>{{ config.title }}</title>
+	<subtitle>{{ config.description }}</subtitle>
+	<link href="{{ feed_url | safe }}" rel="self" type="application/atom+xml"/>
+	<link href="{{ config.base_url | safe }}"/>
+	<generator uri="https://www.getzola.org/">Zola</generator>
+	<updated>{{ last_build_date | date(format="%+") }}</updated>
+	<id>{{ feed_url | safe }}</id>
+	{%- for page in pages %}
+	<entry
+		{%- if page.lang != config.default_language %} xml:lang="{{ page.lang }}"{% endif -%}
+	>
+		<title>{{ page.title }}</title>
+		<published>{{ page.date | date(format="%+") }}</published>
+		<link href="{{ page.permalink | safe }}" type="text/html"/>
+		<id>{{ page.permalink | safe }}</id>
+		<content type="html">{{ page.content }}</description>
+	</item>
+	{%- endfor %}
+</feed>

components/templates/src/lib.rs

@@ -11,6 +11,7 @@ lazy_static! {
         let mut tera = Tera::default();
         tera.add_raw_templates(vec![
             ("__zola_builtins/404.html", include_str!("builtins/404.html")),
+            ("__zola_builtins/atom.xml", include_str!("builtins/atom.xml")),
             ("__zola_builtins/rss.xml", include_str!("builtins/rss.xml")),
             ("__zola_builtins/sitemap.xml", include_str!("builtins/sitemap.xml")),
             ("__zola_builtins/robots.txt", include_str!("builtins/robots.txt")),

docs/content/documentation/content/multilingual.md

@@ -11,9 +11,9 @@ to your `config.toml`. For example:
 
 ```toml
 languages = [
-    {code = "fr", rss = true}, # there will be a RSS feed for French content
+    {code = "fr", feed = true}, # there will be a feed for French content
     {code = "fr", search = true}, # there will be a Search Index for French content
-    {code = "it"}, # there won't be a RSS feed for Italian content
+    {code = "it"}, # there won't be a feed for Italian content
 ]
 ```
 

docs/content/documentation/content/taxonomies.md

@@ -13,7 +13,7 @@ A taxonomy has five variables:
 - `paginate_by`: if this is set to a number, each term page will be paginated by this much.
 - `paginate_path`: if set, this path will be used by the paginated page and the page number will be appended after it.
 For example the default would be page/1.
-- `rss`: if set to `true`, an RSS feed will be generated for each term.
+- `feed`: if set to `true`, a feed will be generated for each term.
 - `lang`: only set this if you are making a multilingual site and want to indicate which language this taxonomy is for
 
 **Example 1:** (one language)

docs/content/documentation/getting-started/configuration.md

@@ -17,11 +17,11 @@ used by Zola as well as their default values are listed below:
 # The base URL of the site; the only required configuration variable.
 base_url = "mywebsite.com"
 
-# The site title and description; used in RSS by default.
+# The site title and description; used in feeds by default.
 title = ""
 description = ""
 
-# The default language; used in RSS.
+# The default language; used in feeds.
 default_language = "en"
 
 # The site theme to use.
@@ -34,12 +34,17 @@ highlight_code = false
 # See below for list of allowed values.
 highlight_theme = "base16-ocean-dark"
 
-# When set to "true", an RSS feed is automatically generated.
-generate_rss = false
+# When set to "true", a feed is automatically generated.
+generate_feed = false
 
-# The number of articles to include in the RSS feed. All items are included if
+# The filename to use for the feed. Used as the template filename, too.
+# Defaults to "atom.xml", which has a builtin template that renders an Atom 1.0 feed.
+# There is also a builtin template "rss.xml" that renders an RSS 2.0 feed.
+# feed_filename = "atom.xml"
+
+# The number of articles to include in the feed. All items are included if
 # this limit is not set (the default).
-# rss_limit = 20
+# feed_limit = 20
 
 # When set to "true", files in the `static` directory are hard-linked. Useful for large
 # static files. Note that for this to work, both `static` and the
@@ -50,10 +55,10 @@ generate_rss = false
 # The taxonomies to be rendered for the site and their configuration.
 # Example:
 #     taxonomies = [
-#       {name = "tags", rss = true}, # each tag will have its own RSS feed
+#       {name = "tags", feed = true}, # each tag will have its own feed
 #       {name = "tags", lang = "fr"}, # you can have taxonomies with the same name in multiple languages
 #       {name = "categories", paginate_by = 5},  # 5 items per page for a term
-#       {name = "authors"}, # Basic definition: no RSS or pagination
+#       {name = "authors"}, # Basic definition: no feed or pagination
 #     ]
 #
 taxonomies = []
@@ -61,9 +66,9 @@ taxonomies = []
 # The additional languages for the site.
 # Example:
 #     languages = [
-#       {code = "fr", rss = true}, # there will be a RSS feed for French content
+#       {code = "fr", feed = true}, # there will be a feed for French content
 #       {code = "fr", search = true}, # there will be a Search Index for French content
-#       {code = "it"}, # there won't be a RSS feed for Italian content
+#       {code = "it"}, # there won't be a feed for Italian content
 #     ]
 #
 languages = []

docs/content/documentation/templates/feeds.md

@@ -0,0 +1,25 @@
++++
+title = "Feeds"
+weight = 50
+aliases = ["/documentation/templates/rss/"]
++++
+
+If the site `config.toml` file sets `generate_feed = true`, then Zola will
+generate a feed file for the site, named according to the `feed_filename`
+setting in `config.toml`, which defaults to `atom.xml`. Given the feed filename
+`atom.xml`, the generated file will live at `base_url/atom.xml`, based upon the
+`atom.xml` file in the `templates` directory, or the built-in Atom template.
+
+`feed_filename` can be set to any value, but built-in templates are provided
+for `atom.xml` (in the preferred Atom 1.0 format), and `rss.xml` (in the RSS
+2.0 format). If you choose a different filename (e.g. `feed.xml`), you will
+need to provide a template yourself.
+
+**Only pages with a date will be available.**
+
+The feed template gets three variables in addition to `config`:
+
+- `feed_url`: the full url to that specific feed
+- `last_build_date`: the date of the latest post
+- `pages`: see [page variables](@/documentation/templates/pages-sections.md#page-variables) for
+a detailed description of what this contains

docs/content/documentation/templates/overview.md

@@ -13,7 +13,7 @@ to learn more about it first.
 All templates live in the `templates` directory.  If you are not sure what variables are available in a template,
 you can place `{{ __tera_context }}` in the template to print the whole context.
 
-A few variables are available on all templates except RSS and the sitemap:
+A few variables are available on all templates except feeds and the sitemap:
 
 - `config`: the [configuration](@/documentation/getting-started/configuration.md) without any modifications
 - `current_path`: the path (full URL without `base_url`) of the current page, never starting with a `/`
@@ -36,12 +36,13 @@ section variables.  The `page.html` template has access to the page variables.
 The page and section variables are described in more detail in the next section.
 
 ## Built-in templates
-Zola comes with three built-in templates: `rss.xml`, `sitemap.xml` and
-`robots.txt` (each is described in its own section of this documentation).
+Zola comes with four built-in templates: `atom.xml` and `rss.xml` (described in
+[Feeds](@/documentation/templates/feeds.md)), `sitemap.xml` (described in [Sitemap](@/documentation/templates/sitemap.md)),
+and `robots.txt` (described in [Robots.txt](@/documentation/templates/robots.md)).
 Additionally, themes can add their own templates, which will be applied if not
 overridden.  You can override built-in or theme templates by creating a template with
-the same name in the correct path. For example, you can override the RSS template by
-creating a `templates/rss.xml` file.
+the same name in the correct path. For example, you can override the Atom template by
+creating a `templates/atom.xml` file.
 
 ## Custom templates
 In addition to the standard `index.html`, `section.html` and `page.html` templates,

docs/content/documentation/templates/rss.md

@@ -1,18 +0,0 @@
-+++
-title = "RSS"
-weight = 50
-+++
-
-If the site `config.toml` file sets `generate_rss = true`, then Zola will
-generate an `rss.xml` page for the site, which will live at `base_url/rss.xml`. To
-generate the `rss.xml` page, Zola will look for an `rss.xml` file in the `templates`
-directory or, if one does not exist, it will use the use the built-in rss template.
-
-**Only pages with a date will be available.**
-
-The RSS template gets three variables in addition to `config`:
-
-- `feed_url`: the full url to that specific feed
-- `last_build_date`: the date of the latest post
-- `pages`: see [page variables](@/documentation/templates/pages-sections.md#page-variables) for
-a detailed description of what this contains

docs/content/documentation/templates/taxonomies.md

@@ -23,7 +23,7 @@ and `TaxonomyConfig` has the following fields:
 name: String,
 paginate_by: Number?;
 paginate_path: String?;
-rss: Bool;
+feed: Bool;
 lang: String;
 ```
 

docs/content/themes/Zulma/index.md

@@ -100,8 +100,8 @@ Zulma has 3 taxonomies already set internally: `tags`, `cateogories` and `author
 ```toml
 taxonomies = [
     {name = "categories"},
-    {name = "tags", paginate_by = 5, rss = true},
-    {name = "authors", rss = true},
+    {name = "tags", paginate_by = 5, feed = true},
+    {name = "authors", feed = true},
 ]
 ```
 

docs/content/themes/after-dark/index.md

@@ -55,9 +55,9 @@ The theme requires tags and categories taxonomies to be enabled in your `config.
 
 ```toml
 taxonomies = [
-    # You can enable/disable RSS
-    {name = "categories", rss = true},
-    {name = "tags", rss = true},
+    # You can enable/disable feeds
+    {name = "categories", feed = true},
+    {name = "tags", feed = true},
 ]
 ```
 If you want to paginate taxonomies pages, you will need to overwrite the templates

docs/content/themes/even/index.md

@@ -48,9 +48,9 @@ The theme requires tags and categories taxonomies to be enabled in your `config.
 
 ```toml
 taxonomies = [
-    # You can enable/disable RSS
-    {name = "categories", rss = true},
-    {name = "tags", rss = true},
+    # You can enable/disable feeds
+    {name = "categories", feed = true},
+    {name = "tags", feed = true},
 ]
 ```
 If you want to paginate taxonomies pages, you will need to overwrite the templates

test_site/config.toml

@@ -2,12 +2,12 @@ title = "My site"
 base_url = "https://replace-this-with-your-url.com"
 highlight_code = true
 compile_sass = true
-generate_rss = true
+generate_feed = true
 theme = "sample"
 slugify_paths = true
 
 taxonomies = [
-    {name = "categories", rss = true},
+    {name = "categories", feed = true},
 ]
 
 extra_syntaxes = ["syntaxes"]

test_site_i18n/config.toml

@@ -13,18 +13,18 @@ build_search_index = true
 
 default_language = "en"
 
-generate_rss = true
+generate_feed = true
 
 taxonomies = [
-    {name = "authors", rss = true},
+    {name = "authors", feed = true},
     {name = "auteurs", lang = "fr"},
     {name = "tags"},
     {name = "tags", lang = "fr"},
 ]
 
 languages = [
- {code = "fr", rss = true},
- {code = "it", rss = false, search = true },
+ {code = "fr", feed = true},
+ {code = "it", feed = false, search = true },
 ]
 
 [extra]