Document the blog.js file but also just remove index() since it just called load.

lib/blog.js

@@ -1,3 +1,10 @@
+/*
+ * Implements a simple markdown blog loader that's used primarily in the
+ * `rendered/pages/blog` example.  It supports generating an RSS/Atom/JSON
+ * feed of pages, loading an index of .md pages, and render markdown with
+ * the headers.  It uses the `lib/docgen.js:render_with_code` to do the
+ * main markdown processing.
+ */
 import path from "path";
 import glob from "fast-glob";
 import assert from "assert";
@@ -7,10 +14,18 @@ import { Feed } from "feed";
 // have to use the client config to avoid pino crashing rollup with json errors
 import { base_host } from "../client/config.js";
 
+// caches the posts so we don't load them repeatedly during runs
 const POSTS = {};
+
 // this keeps POSTS alive, for some reason it disappears during processing
 process.POSTS = POSTS;
 
+/*
+  Takes a directory of `.md` files and returns all of them rendered
+  to HTML+Metadata using `lib/docgen.js:render_with_code`.
+
+  + `source string` -- Source directory to read.
+ */
 export const load = (source) => {
   assert(source !== undefined, "source for markdown processing can't be undefined");
   // just a dumb cache to avoid reading the files over and over
@@ -45,6 +60,16 @@ export const load = (source) => {
   }
 }
 
+/*
+  Renders the `/public/feed.rss`, `/public/feed.atom`, and `/public/feed.json` files
+  based on the `index_config` and posts from `load`. The `index_config` is a `.json`
+  file that describes the blog. The current configuration can be
+  found in `renderd/feed_config.json`.
+
+
+  + `index_config string` -- The path to the `feed_config.json` file.
+  + `posts Array` -- List of posts.
+ */
 export const render_feed = (index_config, posts) => {
   const index = JSON.parse(fs.readFileSync(index_config));
   const feed = new Feed(index);
@@ -69,9 +94,4 @@ export const render_feed = (index_config, posts) => {
   fs.writeFileSync('../public/feed.atom', feed.atom1());
 }
 
-export const index = (source) => {
-  assert(source !== undefined, "source must be defined");
-  return load(source);
-}
-
-export default { load, index, render_feed };
+export default { load, render_feed };

rendered/pages/blog/index.svelte

@@ -4,7 +4,7 @@
   import Icon from '$/client/components/Icon.svelte';
   import markdown from "$/lib/blog.js";
 
-  const posts = markdown.index("rendered/posts");
+  const posts = markdown.load("rendered/posts");
 
 
   markdown.render_feed("./feed_index.json", posts);