Further improved auto-changelogs (#7600)

tools/pull_request_hooks/changelogParser.js

@@ -0,0 +1,80 @@
+import * as changelogConfig from "./changelogConfig.js";
+
+const REGEX_CHANGELOG_LINE = /^(\w+): (.+)$/;
+
+const CHANGELOG_KEYS_TO_ENTRY = {};
+for (const [types, entry] of changelogConfig.CHANGELOG_ENTRIES) {
+	const entryWithChangelogKey = {
+		...entry,
+		changelogKey: types[0],
+	};
+
+	for (const type of types) {
+		CHANGELOG_KEYS_TO_ENTRY[type] = entryWithChangelogKey;
+	}
+}
+
+function parseChangelogBody(lines, openTag) {
+	const [changelogOpening] = lines.splice(0, 1);
+
+	const author =
+		changelogOpening.substring(openTag.length).trim() || undefined;
+
+	const changelog = {
+		author,
+		changes: [],
+	};
+
+	for (const line of lines) {
+		if (line.trim().length === 0) {
+			continue;
+		}
+
+		for (const closeTag of changelogConfig.CHANGELOG_CLOSE_TAGS) {
+			if (line.startsWith(closeTag)) {
+				return changelog;
+			}
+		}
+
+		const match = line.match(REGEX_CHANGELOG_LINE);
+		if (match) {
+			const [_, type, description] = match;
+
+			const entry = CHANGELOG_KEYS_TO_ENTRY[type];
+
+			if (entry.placeholders.includes(description)) {
+				continue;
+			}
+
+			if (entry) {
+				changelog.changes.push({
+					type: entry,
+					description,
+				});
+			}
+		} else {
+			const lastChange = changelog.changes[changelog.changes.length - 1];
+			if (lastChange) {
+				lastChange.description += `\n${line}`;
+			}
+		}
+	}
+
+	return changelog;
+}
+
+export function parseChangelog(text) {
+	const lines = text.split("\n").map((line) => line.trim());
+
+	for (let index = 0; index < lines.length; index++) {
+		const line = lines[index];
+
+		for (const openTag of changelogConfig.CHANGELOG_OPEN_TAGS) {
+			if (line.startsWith(openTag)) {
+				return parseChangelogBody(lines.slice(index), openTag);
+			}
+		}
+	}
+
+	return undefined;
+}