Further unify the scripts

utility/amend-readme/generate-change-log.mjs

@@ -0,0 +1,33 @@
+import fs from "fs";
+import path from "path";
+import url from "url";
+
+import semver from "semver";
+
+import { MdCol } from "./md-format-tools.mjs";
+
+const __dirname = url.fileURLToPath(new URL(".", import.meta.url));
+
+const ChangeFileDir = path.join(__dirname, "../../changes");
+async function GenerateChangeList(argv, out) {
+	const changeFiles = await fs.promises.readdir(ChangeFileDir);
+	const fragments = new Map();
+	for (const file of changeFiles) {
+		const filePath = path.join(ChangeFileDir, file);
+		const fileParts = path.parse(filePath);
+		if (fileParts.ext !== ".md") continue;
+		if (!semver.valid(fileParts.name) || semver.lt(argv.version, fileParts.name)) continue;
+		fragments.set(fileParts.name, await fs.promises.readFile(filePath, "utf8"));
+	}
+	const sortedFragments = Array.from(fragments).sort((a, b) => semver.compare(b[0], a[0]));
+	out.log(`## Modifications since last major version`);
+	for (const [version, notes] of sortedFragments) {
+		out.log(`\n### ${version}\n`);
+		out.log(notes.trimEnd() + "\n");
+	}
+}
+export default (async function main(argv) {
+	const out = new MdCol();
+	await GenerateChangeList(argv, out);
+	await fs.promises.writeFile(argv.outputPath, out.data);
+});