Add blog post author bylines

docs/source/_static/css/custom.css

@@ -72,3 +72,21 @@ html[data-theme=dark] .bd-main img {
   flex-wrap: wrap;
   justify-content: space-between;
 }
+
+.blog-post-author {
+  border-left: 3px solid var(--pst-color-primary);
+  color: var(--pst-color-text-muted);
+  font-size: 1.12rem;
+  line-height: 1.5;
+  margin-top: -0.2rem;
+  margin-bottom: 2rem;
+  padding-left: 0.8rem;
+}
+
+.blog-post-author a {
+  font-weight: 600;
+}
+
+.blog-post-author .line:nth-child(2) {
+  font-size: 1rem;
+}

docs/source/conf.py

@@ -14,6 +14,10 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 
+from ablog.blog import Blog
+from docutils import nodes
+from sphinx.errors import ExtensionError
+
 
 # -- Project information -----------------------------------------------------
 
@@ -95,6 +99,60 @@
         "Authorization": f"Bearer {os.environ.get('GITHUB_TOKEN', '')}",
     },
 }
+
+
+def add_blog_author_byline(app, doctree, docname):
+    """Add ABlog author metadata to individual blog post pages."""
+    posts = getattr(app.env, "ablog_posts", {}).get(docname, [])
+    if len(posts) != 1:
+        return
+
+    post = posts[0]
+    authors = post.get("author", [])
+    date = post.get("date")
+    if not authors or not date:
+        raise ExtensionError(
+            f"Blog post '{docname}' must define both author and date metadata."
+        )
+
+    byline = nodes.line_block(classes=["blog-post-author"])
+
+    if authors:
+        author_line = nodes.line()
+        author_line += nodes.Text("By ")
+
+        blog = Blog(app)
+        author_catalog = blog.catalogs["author"].collections
+        for index, author in enumerate(authors):
+            if index:
+                author_line += nodes.Text(", ")
+
+            author_page = author_catalog.get(author)
+            if author_page is None:
+                author_line += nodes.Text(author)
+                continue
+
+            author_line += nodes.reference(
+                "",
+                author,
+                refuri=app.builder.get_relative_uri(docname, author_page.docname),
+            )
+
+        byline += author_line
+
+    if date:
+        byline += nodes.line(text=date.strftime(app.config["post_date_format"]))
+
+    for section in doctree.findall(nodes.section):
+        if section.children and isinstance(section.children[0], nodes.title):
+            section.insert(1, byline)
+            return
+
+
+def setup(app):
+    app.connect("doctree-resolved", add_blog_author_byline)
+
+
 # Suppress strikethrough warnings - strikethrough is only supported in HTML
 suppress_warnings = ['myst.strikethrough']