build: update changelog creation script to impose a 500 character lim…

…it (#23)

scripts/convert-markdown-to-plain-text.mjs

@@ -2,10 +2,14 @@
  * Converts markdown to plain text, but retains ordered and unordered lists.
  *
  * @param {string} markdown - The markdown.
+ * @param {number} maxCharacterLimit - Maximum character limit.
  * @returns {string | null} The markdown converted to plaintext, or null if no markdown is specified.
  */
-function convertMarkdownToPlainText(markdown) {
+function convertMarkdownToPlainText(markdown, maxCharacterLimit = 500) {
+  let charCount = 0;
+  let lines;
   let plainText;
+  let truncatedText = '';
 
   if (!markdown) {
     console.log('no makrdown specified');
@@ -23,8 +27,23 @@ function convertMarkdownToPlainText(markdown) {
   // remove inline code (`code`) and code blocks (```) -> code
   plainText = plainText.replace(/`([^`]+)`/g, '$1');
   plainText = plainText.replace(/```[\s\S]*?```/g, '');
+  // remove multiple blank lines
+  plainText = plainText.replace(/\n\s*\n+/g, '\n\n');
 
-  return plainText;
+  // split the text
+  lines = plainText.split('\n');
+
+  // truncate
+  for (const line of lines) {
+    if (charCount + line.length > maxCharacterLimit) {
+      break;
+    }
+
+    truncatedText += (truncatedText ? '\n' : '') + line;
+    charCount += line.length + 1;
+  }
+
+  return truncatedText;
 }
 
 export default convertMarkdownToPlainText;

scripts/create-store-release-notes.mjs

@@ -28,7 +28,10 @@ function main(version, notes) {
     process.exit(1);
   }
 
-  releaseNotes = convertMarkdownToPlainText(notes);
+  releaseNotes = convertMarkdownToPlainText(
+    notes,
+    500 // google imposes a 500 character limit on changelogs
+  );
 
   if (!releaseNotes) {
     console.error('failed to convert the release notes to plain text');