makes ESM module

Author: saneef

.eleventy.js

@@ -1,6 +1,6 @@
-module.exports = {
+export default {
   files: ["tests/**/*", "!tests/utils.js"],
   watchMode: {
     ignoreChanges: ["tests/output/**"],
   },
-};
+};

ava.config.cjs ava.config.jsava.config.cjs renamed to ava.config.js

@@ -1,16 +1,22 @@
-const { defineConfig } = require("eslint/config");
-const prettier = require("eslint-plugin-prettier");
-const globals = require("globals");
-const js = require("@eslint/js");
-const { FlatCompat } = require("@eslint/eslintrc");
+import { FlatCompat } from "@eslint/eslintrc";
+import js from "@eslint/js";
+import prettier from "eslint-plugin-prettier";
+import { defineConfig } from "eslint/config";
+import globals from "globals";
+import path from "path";
+import { fileURLToPath } from "url";
+
+// Mimic CommonJS variables -- not needed if using CommonJS
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 const compat = new FlatCompat({
   baseDirectory: __dirname,
   recommendedConfig: js.configs.recommended,
   allConfig: js.configs.all,
 });
 
-module.exports = defineConfig([
+export default defineConfig([
   {
     extends: compat.extends("xo-space", "plugin:prettier/recommended"),
 

eslint.config.js

@@ -0,0 +1,16 @@
+// @ts-check
+import getCollectionNewestGitCommitDate from "./src/getCollectionNewestGitCommitDate.js";
+import getGitCommitDateFromPath from "./src/getGitCommitDateFromPath.js";
+
+export default function (eleventyConfig) {
+  eleventyConfig.addFilter(
+    "getGitCommitDateFromPath",
+    getGitCommitDateFromPath,
+  );
+  eleventyConfig.addFilter(
+    "getCollectionNewestGitCommitDate",
+    getCollectionNewestGitCommitDate,
+  );
+}
+
+export { getCollectionNewestGitCommitDate, getGitCommitDateFromPath };

index.js

@@ -2,7 +2,8 @@
   "name": "eleventy-plugin-git-commit-date",
   "version": "0.1.3",
   "description": "Eleventy plugin to get Git commit time of a file, or a Eleventy collection.",
-  "main": ".eleventy.js",
+  "main": "index.js",
+  "type": "module",
   "repository": {
     "type": "git",
     "url": "git+https://github.com:saneef/eleventy-plugin-git-commit-date.git"

package.json

@@ -3,4 +3,4 @@ const config = {
   plugins: ["prettier-plugin-jsdoc"],
 };
 
-module.exports = config;
+export default config;

prettier.config.js

@@ -1,7 +1,6 @@
 // @ts-check
-
-const getGitCommitDateFromPath = require("./getGitCommitDateFromPath");
-const memoize = require("./utils/memoize");
+import getGitCommitDateFromPath from "./getGitCommitDateFromPath.js";
+import memoize from "./utils/memoize.js";
 
 /**
  * Gets the collection's newest Git commit date.
@@ -26,4 +25,4 @@ function getCollectionNewestGitCommitDate(collection) {
   }
 }
 
-module.exports = memoize(getCollectionNewestGitCommitDate);
+export default memoize(getCollectionNewestGitCommitDate);

src/getCollectionNewestGitCommitDate.js

@@ -1,7 +1,7 @@
 // @ts-check
-const path = require("path");
-const spawn = require("cross-spawn");
-const memoize = require("./utils/memoize");
+import spawn from "cross-spawn";
+import path from "node:path";
+import memoize from "./utils/memoize.js";
 
 /**
  * Gets the Git commit date from path.
@@ -36,4 +36,4 @@ function getGitCommitDateFromPath(filePath) {
   }
 }
 
-module.exports = memoize(getGitCommitDateFromPath);
+export default memoize(getGitCommitDateFromPath);

src/getGitCommitDateFromPath.js

@@ -7,7 +7,7 @@
  * @param {Function} fn The function to memoize
  * @returns {Function}
  */
-function memoize(fn) {
+export default function memoize(fn) {
   const cache = new Map();
 
   return (...args) => {
@@ -25,5 +25,3 @@ function memoize(fn) {
     return cache.get(cacheKey);
   };
 }
-
-module.exports = memoize;

src/utils/memoize.js

@@ -1,10 +1,11 @@
-const test = require("ava");
-const path = require("path");
-const fs = require("fs/promises");
-const { rimraf } = require("rimraf");
-const getCollectionNewestGitCommitDate = require("../src/getCollectionNewestGitCommitDate.js");
+import test from "ava";
+import { mkdir, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { rimraf } from "rimraf";
+import { fileURLToPath } from "url";
+import { getCollectionNewestGitCommitDate } from "../index.js";
 
-const outputBase = path.join("tests/output/");
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 test("Get newest commit date of collection", (t) => {
   const collection = [
@@ -23,15 +24,16 @@ test("Shouldn't get commit date from an empty collection", async (t) => {
 });
 
 test("Shouldn't get commit date from collection of uncommited files", async (t) => {
+  const outputBase = path.join("tests/output/");
   const collection = [
     { inputPath: path.join(outputBase, "test-01.md") },
     { inputPath: path.join(outputBase, "test-02.md") },
   ];
 
   await rimraf(outputBase);
 
-  await fs.mkdir(outputBase, { recursive: true });
-  await Promise.all(collection.map((p) => fs.writeFile(p.inputPath, "")));
+  await mkdir(outputBase, { recursive: true });
+  await Promise.all(collection.map((p) => writeFile(p.inputPath, "")));
 
   t.is(getCollectionNewestGitCommitDate(collection), undefined);