chore: add script to format GitHub changelog (#12158)

packages/vant/docs/formatChangelog.mjs

@@ -0,0 +1,60 @@
+/**
+ * This script is used to format changelog which is generated by GitHub
+ * because we need to paste it to the changelog page of Vant website.
+ */
+
+// paste changelog here
+const changelog = ``;
+
+changelog.split('\n').map((line) => {
+  // Skip unused lines
+  if (
+    line.startsWith('> Please refer to') ||
+    line.startsWith('release:') ||
+    line.includes("What's Changed") ||
+    line.includes('Full Changelog') ||
+    line.includes('docs(changelog)')
+  ) {
+    return;
+  }
+
+  if (line.startsWith('<!-- Release notes generated')) {
+    const version = line.match(/v\d+\.\d+\.\d+/)[0];
+    if (version) {
+      console.log(`### ${version}`);
+      // log the current date
+      const now = new Date();
+      const padZero = (num) => (num < 10 ? `0${num}` : num);
+      console.log(
+        `\`${now.getFullYear()}-${padZero(now.getMonth() + 1)}-${padZero(
+          now.getDate(),
+        )}\``,
+      );
+    }
+    return;
+  }
+
+  // format title
+  if (line.startsWith('### ')) {
+    line = line.replace('### ', '#### ');
+  } else if (line.startsWith('## ')) {
+    line = line.replace('## ', '#### ');
+  }
+
+  // format PR link
+  const regex = /https:\/\/github\.com\/(\w+\/\w+)\/pull\/(\d+)/;
+  const match = line.match(regex);
+  const repoName = match ? match[1] : null;
+  const pullRequestNumber = match ? match[2] : null;
+
+  if (repoName && pullRequestNumber) {
+    line = line.replace(
+      regex,
+      `[#${pullRequestNumber}](https://github.com/${repoName}/pull/${pullRequestNumber})`,
+    );
+  }
+
+  // format author
+  line = line.replace(/@([\w-]+)/, '[$1](https://github.com/$1)');
+  console.log(line);
+});