From ba451a6b9ba283b4c519283a45aa523662854677 Mon Sep 17 00:00:00 2001
From: Kumar Damani <me@kumardamani.net>
Date: Mon, 3 Aug 2026 12:55:54 -0400
Subject: added rss2 feed

---
 feed.typ | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 feed.typ

(limited to 'feed.typ')

diff --git a/feed.typ b/feed.typ
new file mode 100644
index 0000000..75639e0
--- /dev/null
+++ b/feed.typ
@@ -0,0 +1,54 @@
+// RSS 2.0 feed for the blog posts, emitted as feed.xml by main.typ.
+// Items are built from the metadata in site-info.pages (newest first).
+
+#import "/global/common.typ": baseurl
+
+#let xml-escape(s) = s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
+
+// ISO date ("2026-07-28") to RFC 822 ("Tue, 28 Jul 2026 00:00:00 GMT").
+#let rfc822(iso) = {
+    let (y, m, d) = iso.split("-").map(int)
+    datetime(year: y, month: m, day: d).display(
+        "[weekday repr:short], [day] [month repr:short] [year] 00:00:00 GMT"
+    )
+}
+
+#let feed-xml(site-info) = {
+    let pages = site-info.pages
+    let ids = pages.keys().filter(k => k.starts-with("post/"))
+
+    let items = ()
+    for id in ids {
+        let p = pages.at(id)
+        let title = if "long-title" in p { p.long-title } else { p.title }
+        let url = baseurl + "/" + id + ".html"
+
+        let lines = (
+            "  <item>",
+            "    <title>" + xml-escape(title) + "</title>",
+            "    <link>" + url + "</link>",
+            "    <guid>" + url + "</guid>",
+        )
+        if "date" in p {
+            lines.push("    <pubDate>" + rfc822(p.date) + "</pubDate>")
+        }
+        if "description" in p {
+            lines.push("    <description>" + xml-escape(p.description) + "</description>")
+        }
+        lines.push("  </item>")
+        items.push(lines.join("\n"))
+    }
+
+    (
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>",
+        "<rss version=\"2.0\">",
+        "<channel>",
+        "  <title>" + xml-escape(site-info.title) + "</title>",
+        "  <link>" + baseurl + "/</link>",
+        "  <description>Posts from " + xml-escape(site-info.title) + " (" + baseurl + ")</description>",
+        items.join("\n"),
+        "</channel>",
+        "</rss>",
+        "",
+    ).join("\n")
+}
-- 
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