chore: update tag archive

Author: TrebledJ

content/tags/music/style/worship.md

@@ -1,4 +1,5 @@
 ---
+archived: true
 ---
 
 Music to praise and honour the one true God.

content/tags/software/embedded/esp32.md

@@ -1,5 +1,6 @@
 ---
 title: ESP32
+archived: true
 ---
 
 A series of low-cost, low-power system-on-a-chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. Reliable.

content/tags/software/embedded/iot.md

@@ -1,5 +1,6 @@
 ---
 title: IoT
+archived: true
 ---
 
 The Internet of Things (IoT) describes physical objects with sensors, processing ability, software and other technologies that connect and exchange data with other devices and systems over the internet or other communications networks.

content/tags/tags.11tydata.js

@@ -11,7 +11,7 @@ export default {
   sortByLatest: true,
   date: '2022-08-01',
   eleventyComputed: {
-    permalink: data => `/tags/${data.page.fileSlug}/index.html`,
+    permalink: data => data.archived ? false : (data.permalink ?? `/tags/${data.page.fileSlug}/index.html`),
     title: data => data.title || toTitleCase(data.page.fileSlug),
     tag: data => data.page.fileSlug,
 

eleventy/filters.js

@@ -246,4 +246,19 @@ export default function (eleventyConfig) {
     const db = new Date(b);
     return da > db ? da : db;
   });
+
+  eleventyConfig.addNunjucksGlobal('checkNonEmptyTag', (xs, tag, archived) => {
+    if (typeof xs.length !== 'number') {
+      throw new Error(`expected array but got ${xs.length}`);
+    }
+    if (!archived) {
+      if (xs.length === 0) {
+        console.warn(`Detected tag with no post: ${tag}. Consider adding \`archive: true\` to the frontmatter.`);
+      }
+    } else {
+      if (xs.length > 0) {
+        console.warn(`Detected tag with posts, and tag is archived. Consider removing the tag from the posts:\n${xs.map(x => x.page.filePathStem).join('\n')}.`)
+      }
+    }
+  });
 };

partials/_includes/layouts/page-tag.njk

@@ -3,6 +3,8 @@ layout: layouts/page-default
 logo: tag
 ---
 
+{% set _xxx = checkNonEmptyTag(collections[tag], tag, archived) %}
+
 {# See Note [with context]. #}
 {% from "post/preview.html" import render_post_preview with context %}
 {% from "sidebars/sidebar-utils.html" import tags_sidebar with context %}
@@ -11,8 +13,10 @@ logo: tag
 
 <div class="page-content-container row gx-lg-5">
     <div class="col-lg-4">
-        {% set groups = [tag] | getRelatedTags(collections.tags, collections.tagcount) %}
-        {{ tags_sidebar("Related Tags", groups) }}
+        {% if not archived %} {# Avoid calling getRelatedTags on archived tags... #}
+            {% set groups = [tag] | getRelatedTags(collections.tags, collections.tagcount) %}
+            {{ tags_sidebar("Related Tags", groups) }}
+        {% endif %}
     </div>
 
     <div class="col-lg-8">