From a0b0ccbb19624c6ddc143a7acfc3386b7ffd5240 Mon Sep 17 00:00:00 2001
From: Zach Leatherman <zachleatherman@gmail.com>
Date: Thu, 2 Feb 2023 08:10:43 -0600
Subject: [PATCH] Only addPlugin once

---
 eleventy.config.js      | 21 +++++++++++++++++----
 eleventy.shortcodes.js  |  4 ++--
 package.json            |  2 +-
 sample/sample-config.js |  7 +++++--
 4 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/eleventy.config.js b/eleventy.config.js
index 8668abb..2ac8977 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -1,6 +1,6 @@
 const pkg = require("./package.json");
 const shortcodesPlugin = require("./eleventy.shortcodes.js");
-// const debug = require("debug")("Eleventy:Bundle");
+const debug = require("debug")("Eleventy:Bundle");
 
 function normalizeOptions(options) {
 	let shortcodes = Object.assign({
@@ -23,7 +23,9 @@ function normalizeOptions(options) {
 	return options;
 }
 
-module.exports = function(eleventyConfig, options = {}) {
+let hasExecuted = false;
+
+function eleventyBundlePlugin(eleventyConfig, options = {}) {
 	try {
 		eleventyConfig.versionCheck(pkg["11ty"].compatibility);
 	} catch(e) {
@@ -32,5 +34,16 @@ module.exports = function(eleventyConfig, options = {}) {
 
 	options = normalizeOptions(options);
 
-	eleventyConfig.addPlugin(shortcodesPlugin, options);
-};
\ No newline at end of file
+	eleventyConfig.on("eleventy.before", () => {
+		hasExecuted = false;
+	});
+
+	if(hasExecuted) {
+		debug("Warning: You can only addPlugin @11ty/eleventy-plugin-bundle once per project. Subsequent adds are ignored.");
+	} else {
+		hasExecuted = true;
+		shortcodesPlugin(eleventyConfig, options);
+	}
+};
+
+module.exports = eleventyBundlePlugin;
diff --git a/eleventy.shortcodes.js b/eleventy.shortcodes.js
index ca2b81d..8d5142b 100644
--- a/eleventy.shortcodes.js
+++ b/eleventy.shortcodes.js
@@ -17,7 +17,7 @@ module.exports = function(eleventyConfig, options = {}) {
 			}
 
 			if(addShortcodeName) {
-				eleventyConfig.addPairedShortcode(addShortcodeName, function addContent(content, bucket, urlOverride) {		
+				eleventyConfig.addPairedShortcode(addShortcodeName, function addContent(content, bucket, urlOverride) {
 					let url = urlOverride || this.page.url;
 					managers[name].addToPage(url, content, bucket);
 					return "";
@@ -77,4 +77,4 @@ module.exports = function(eleventyConfig, options = {}) {
 			}
 		});
 	}
-};
\ No newline at end of file
+};
diff --git a/package.json b/package.json
index ef8da16..d4d5ccb 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
 	"description": "Little bundles of code, little bundles of joy.",
 	"main": "eleventy.config.js",
 	"scripts": {
-		"sample": "npx @11ty/eleventy --config=sample/sample-config.js --input=sample",
+		"sample": "DEBUG=Eleventy:Bundle npx @11ty/eleventy --config=sample/sample-config.js --input=sample",
 		"test": "npx ava"
 	},
 	"publishConfig": {
diff --git a/sample/sample-config.js b/sample/sample-config.js
index c265dba..6efdf70 100644
--- a/sample/sample-config.js
+++ b/sample/sample-config.js
@@ -1,3 +1,6 @@
+const bundlePlugin = require("../eleventy.config.js");
+
 module.exports = function(eleventyConfig) {
-	eleventyConfig.addPlugin(require("../eleventy.config.js"));
-};
\ No newline at end of file
+	eleventyConfig.addPlugin(bundlePlugin);
+	eleventyConfig.addPlugin(bundlePlugin);
+};