From f41419a436252f7b320e295f6f6172315cc10ad8 Mon Sep 17 00:00:00 2001
From: "Graham F. Scott" <gfscott@gmail.com>
Date: Sun, 8 Dec 2024 14:43:06 -0500
Subject: [PATCH 1/2] Deduplicate active plugin list when using 'add' option

---
 packages/everything/lib/configOptions.js       |  3 ++-
 packages/everything/test/test-configOptions.js | 11 +++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/packages/everything/lib/configOptions.js b/packages/everything/lib/configOptions.js
index a1cf6e55..7f5df983 100644
--- a/packages/everything/lib/configOptions.js
+++ b/packages/everything/lib/configOptions.js
@@ -21,8 +21,9 @@ module.exports = function(options = {}) {
 function setActivePlugins(obj) {
 	let active = [...defaultPlugins]; // default
 	// Add to default plugin list
+	// The `Set` ensures there are no duplicates
 	if (obj.add) {
-		active = [...defaultPlugins, ...obj.add];
+		active = [...new Set([...defaultPlugins, ...obj.add])];
 	}
 	// Define custom plugin list from scratch.
 	// Will always override `add`
diff --git a/packages/everything/test/test-configOptions.js b/packages/everything/test/test-configOptions.js
index a8465b17..58204bdb 100644
--- a/packages/everything/test/test-configOptions.js
+++ b/packages/everything/test/test-configOptions.js
@@ -70,6 +70,17 @@ test(
 	},
 );
 
+test(
+	`Config "add" option returns deduplicated output when adding plugins already included by default`,
+	(t) => {
+		let output = config({
+			// These are already active by default, so `add`ing should do nothing
+			add: ["youtube", "vimeo"],
+		});
+		t.deepEqual(output, defaultOptions);
+	},
+)
+
 test(
 	`Config returns expected output with valid "use" option`,
 	(t) => {

From 1fd1ba81d920f65d9ba9cb32d2d9b2a5ac79e9a3 Mon Sep 17 00:00:00 2001
From: "Graham F. Scott" <gfscott@gmail.com>
Date: Sun, 8 Dec 2024 14:51:51 -0500
Subject: [PATCH 2/2] Changeset

---
 .changeset/green-cameras-invent.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/green-cameras-invent.md

diff --git a/.changeset/green-cameras-invent.md b/.changeset/green-cameras-invent.md
new file mode 100644
index 00000000..911f2889
--- /dev/null
+++ b/.changeset/green-cameras-invent.md
@@ -0,0 +1,5 @@
+---
+"eleventy-plugin-embed-everything": patch
+---
+
+Deduplicate list of active plugins when using the 'add' option