Multiple IANA codegen enhancement

- JWS/JWE algorithms are properly splitted
 - Enums now have a proper description
 - They implement FromStr and Display
 - mas-jose does not reexport mas-iana anymore

crates/iana-codegen/src/main.rs

@@ -27,8 +27,7 @@ struct File {
     client: Arc<Client>,
     registry_name: &'static str,
     registry_url: &'static str,
-    sections: Vec<&'static str>,
-    sources: Vec<&'static str>,
+    sections: Vec<Section>,
     items: HashMap<&'static str, Vec<EnumMember>>,
 }
 
@@ -46,7 +45,6 @@ impl File {
             client,
             registry_name,
             registry_url,
-            sources: Vec::new(),
             sections: Vec::new(),
             items: HashMap::new(),
         }
@@ -55,8 +53,7 @@ impl File {
     #[tracing::instrument(skip_all, fields(url))]
     async fn load<T: EnumEntry>(mut self) -> anyhow::Result<Self> {
         tracing::Span::current().record("url", &T::URL);
-        self.sections.extend_from_slice(T::SECTIONS);
-        self.sources.push(T::URL);
+        self.sections.extend(T::sections());
         for (key, value) in T::fetch(&self.client).await? {
             self.items.entry(key).or_default().push(value);
         }
@@ -99,43 +96,43 @@ impl Display for File {
 
 //! Enums from the {:?} IANA registry
 //! See <{}>
-//!
-//! Generated from:"#,
+
+// Do not edit this file manually
+
+use parse_display::{{Display, FromStr}};
+use schemars::JsonSchema;
+use serde::{{Deserialize, Serialize}};"#,
             self.registry_name, self.registry_url,
         )?;
 
-        for source in &self.sources {
-            writeln!(f, "//!  - <{}>", source)?;
-        }
-
-        writeln!(
-            f,
-            r#"
-// Do not edit this file manually
-
-use schemars::JsonSchema;
-use serde::{{Deserialize, Serialize}};"#
-        )?;
-
-        for key in &self.sections {
-            let list = if let Some(list) = self.items.get(key) {
+        for section in &self.sections {
+            let list = if let Some(list) = self.items.get(section.key) {
                 list
             } else {
                 continue;
             };
 
-            writeln!(f)?;
-            writeln!(
+            write!(
                 f,
-                "#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema)]"
+                r#"
+/// {}
+///
+/// Source: <{}>
+#[derive(
+    Debug, Clone, Copy, PartialEq, Eq, Hash, Display, FromStr, Serialize, Deserialize, JsonSchema,
+)]
+pub enum {} {{"#,
+                section.doc,
+                section.url.unwrap(),
+                section.key,
             )?;
-            write!(f, "pub enum {} {{", key)?;
             for member in list {
                 writeln!(f)?;
                 if let Some(description) = &member.description {
                     writeln!(f, "    /// {}", description)?;
                 }
                 writeln!(f, "    #[serde(rename = \"{}\")]", member.value)?;
+                writeln!(f, "    #[display(\"{}\")]", member.value)?;
                 writeln!(f, "    {},", member.enum_name)?;
             }
             writeln!(f, "}}")?;