1 files changed, 55 insertions, 0 deletions
diff --git a/node_modules/@11ty/eleventy/src/Util/JavaScriptDependencies.js b/node_modules/@11ty/eleventy/src/Util/JavaScriptDependencies.js
new file mode 100644
index 0000000..7f6e809
--- /dev/null
+++ b/node_modules/@11ty/eleventy/src/Util/JavaScriptDependencies.js
@@ -0,0 +1,55 @@
+import dependencyTree from "@11ty/dependency-tree";
+import { find } from "@11ty/dependency-tree-esm";
+import { TemplatePath } from "@11ty/eleventy-utils";
+
+import EleventyBaseError from "../Errors/EleventyBaseError.js";
+
+class JavaScriptDependencies {
+	static getErrorMessage(file, type) {
+		return `A problem was encountered looking for JavaScript dependencies in ${type} file: ${file}. This only affects --watch and --serve behavior and does not affect your build.`;
+	}
+
+	static async getDependencies(inputFiles, isProjectUsingEsm) {
+		let depSet = new Set();
+
+		// TODO does this need to work with aliasing? what other JS extensions will have deps?
+		let commonJsFiles = inputFiles.filter(
+			(file) => (!isProjectUsingEsm && file.endsWith(".js")) || file.endsWith(".cjs"),
+		);
+
+		for (let file of commonJsFiles) {
+			try {
+				let modules = dependencyTree(file, {
+					nodeModuleNames: "exclude",
+					allowNotFound: true,
+				}).map((dependency) => {
+					return TemplatePath.addLeadingDotSlash(TemplatePath.relativePath(dependency));
+				});
+
+				for (let dep of modules) {
+					depSet.add(dep);
+				}
+			} catch (e) {
+				throw new EleventyBaseError(this.getErrorMessage(file, "CommonJS"), e);
+			}
+		}
+
+		let esmFiles = inputFiles.filter(
+			(file) => (isProjectUsingEsm && file.endsWith(".js")) || file.endsWith(".mjs"),
+		);
+		for (let file of esmFiles) {
+			try {
+				let modules = await find(file);
+				for (let dep of modules) {
+					depSet.add(dep);
+				}
+			} catch (e) {
+				throw new EleventyBaseError(this.getErrorMessage(file, "ESM"), e);
+			}
+		}
+
+		return Array.from(depSet).sort();
+	}
+}
+
+export default JavaScriptDependencies;