1 files changed, 62 insertions, 0 deletions
diff --git a/node_modules/@11ty/eleventy/src/Util/ExistsCache.js b/node_modules/@11ty/eleventy/src/Util/ExistsCache.js
new file mode 100644
index 0000000..433d743
--- /dev/null
+++ b/node_modules/@11ty/eleventy/src/Util/ExistsCache.js
@@ -0,0 +1,62 @@
+import fs from "node:fs";
+import { TemplatePath } from "@11ty/eleventy-utils";
+
+// Checks both files and directories
+class ExistsCache {
+	#exists = new Map();
+	#dirs = new Map();
+
+	constructor() {
+		this.lookupCount = 0;
+	}
+
+	get size() {
+		return this.#exists.size;
+	}
+
+	has(path) {
+		return this.#exists.has(path);
+	}
+
+	set(path, isExist) {
+		this.#exists.set(TemplatePath.addLeadingDotSlash(path), Boolean(isExist));
+	}
+
+	// Not yet needed
+	// setDirectory(path, isExist) {}
+
+	// Relative paths (to root directory) expected (but not enforced due to perf costs)
+	exists(path) {
+		if (!this.#exists.has(path)) {
+			let exists = fs.existsSync(path);
+			this.lookupCount++;
+
+			// mark for next time
+			this.#exists.set(path, Boolean(exists));
+
+			return exists;
+		}
+
+		return this.#exists.get(path);
+	}
+
+	isDirectory(path) {
+		if (!this.exists(path)) {
+			return false;
+		}
+
+		if (!this.#dirs.has(path)) {
+			let isDir = fs.statSync(path).isDirectory();
+			this.lookupCount++;
+
+			// mark for next time
+			this.#dirs.set(path, isDir);
+
+			return isDir;
+		}
+
+		return this.#dirs.get(path);
+	}
+}
+
+export default ExistsCache;