Create Tags(Output) class and move tag rendering there from Site

omicron/ssg/output/__init__.py

@@ -3,6 +3,7 @@ from omicron.ssg.output.content import Content, ContentError
 from omicron.ssg.output.factory import create_content, is_content
 from omicron.ssg.output.index import Index, discover_index
 from omicron.ssg.output.memory import Memory
+from omicron.ssg.output.tags import Tags, discover_tags
 
 __all__ = [
     "Output",
@@ -13,4 +14,6 @@ __all__ = [
     "Index",
     "discover_index",
     "Memory",
+    "Tags",
+    "discover_tags",
 ]

omicron/ssg/output/tags.py

@@ -0,0 +1,28 @@
+import logging
+from typing import TYPE_CHECKING
+from omicron.ssg.output.output import Output
+
+log = logging.getLogger(__name__)
+
+if TYPE_CHECKING:
+    from omicron.ssg.site import Site
+else:
+    Site = "omicron.ssg.site.Site"
+
+
+class Tags(Output):
+    def __init__(self, tags: list[tuple[str, int]]):
+        super().__init__("tags/index.html")
+        self.tags = tags
+
+    def write(self, site: Site) -> None:
+        template = site.jinja_env.get_template("tags.html")
+        html = template.render(site=site, tags=self.tags)
+        dest = site.output_path / self.uri
+        dest.parent.mkdir(parents=True, exist_ok=True)
+        dest.write_text(html, encoding="utf-8")
+        log.debug("Wrote %s", dest)
+
+
+def discover_tags(site: Site) -> Tags:
+    return Tags(site.tags_by_count)

omicron/ssg/site.py

@@ -10,6 +10,7 @@ from omicron.ssg.output import (
     create_content,
     Memory,
     discover_index,
+    discover_tags,
 )
 from omicron.ssg.markdown import highlight_style
 
@@ -120,15 +121,11 @@ class Site:
         for index in discover_index(self):
             self.add_by_uri(index)
             self.other_outputs.append(index)
+        tags_page = discover_tags(self)
+        self.add_by_uri(tags_page)
+        self.other_outputs.append(tags_page)
         log.info("Discovered %d content items", len(self.content))
 
-    def render_tags_page(self) -> None:
-        template = self.jinja_env.get_template("tags.html")
-        html = template.render(site=self, tags=self.tags_by_count)
-        tags_dir = self.output_path / "tags"
-        tags_dir.mkdir(parents=True, exist_ok=True)
-        (tags_dir / "index.html").write_text(html, encoding="utf-8")
-
     def build(self) -> None:
         if not self.origin:
             log.warning(
@@ -141,6 +138,5 @@ class Site:
         self.output_path.mkdir(parents=True, exist_ok=True)
         for content in self.content:
             content.write(self)
-        self.render_tags_page()
         for output in self.other_outputs:
             output.write(self)