add rss feed

.eleventy.js

@@ -1,6 +1,35 @@
+const fs = require("fs");
+
+// generate hash of a string
+String.prototype.hashCode = function () {
+  var hash = 0,
+    i,
+    chr;
+  if (this.length === 0) return hash;
+  for (i = 0; i < this.length; i++) {
+    chr = this.charCodeAt(i);
+    hash = (hash << 5) - hash + chr;
+    hash |= 0; // Convert to 32bit integer
+  }
+  return hash;
+};
+
 module.exports = function (eleventyConfig) {
   // static files
   eleventyConfig.addPassthroughCopy({ public: "/" });
   eleventyConfig.addPassthroughCopy({ springy: "/" });
   eleventyConfig.addPassthroughCopy("polycule.json");
+
+  eleventyConfig.addFilter("fullisodate", (dt) => {
+    return dt.toISOString();
+  });
+  eleventyConfig.addFilter("now", () => {
+    return new Date();
+  });
+  eleventyConfig.addFilter("polycule", () => {
+    return fs.readFileSync("polycule.json").toString();
+  });
+  eleventyConfig.addFilter("id", (toid) => {
+    return toid.hashCode();
+  });
 };

rss.hbs

@@ -0,0 +1,20 @@
+---
+permalink: index.xml
+---
+<?xml version='1.0' encoding='UTF-8'?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+    <title>polycule</title>
+    <link href='{{log URIs.root}}/polycule/index.xml' rel='self' />
+    <updated>{{fullisodate (now)}}</updated>
+    <author>
+        <name>alifeee</name>
+    </author>
+    <id>{{URIs.root}}/</id>
+    <entry>
+        <title>polycule</title>
+        <link href='{{URIs.root}}/polycule/' />
+        <id>uuid:{{id (polycule)}}</id>
+        <updated>{{fullisodate (now)}}</updated>
+        <summary>updated!</summary>
+    </entry>
+</feed>