b

src/remark-modified-time.mjs

@@ -0,0 +1,22 @@
+import { execSync } from "child_process";
+import { statSync } from "fs";
+
+export function remarkModifiedTime() {
+  return function (tree, file) {
+    const filepath = file.history[0];
+    try {
+        const result = execSync(`git log -1 --pretty="format:%cI" "${filepath}"`);
+        // If  result is empty or undefined, fallback to fs stat
+        if (!result || !result.toString().trim()) {
+            throw new Error("No git history");
+        } 
+        file.data.astro.frontmatter.lastModified = result.toString();
+        return;
+    } catch (e) {
+        // Ignore, fallback to fs stat
+        const result = statSync(filepath);
+        file.data.astro.frontmatter.lastModified = result.mtime.toISOString();
+        return;
+    }
+  };
+}