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fix: parallelize R2 uploads in md-exports child-listings phase #16357

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Merged
BYK merged 1 commit into from
Feb 12, 2026
Merged

fix: parallelize R2 uploads in md-exports child-listings phase #16357

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18 changes: 15 additions & 3 deletions scripts/generate-md-exports.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -301,6 +301,7 @@ ${

// Append child listings to parent index files
let updatedCount = 0;
const r2Uploads = [];
for (const [parentPath, children] of pathsByParent) {
const parentFile = path.join(OUTPUT_DIR, parentPath);
let existingContent;
Expand Down Expand Up @@ -348,17 +349,28 @@ ${
await writeFile(parentFile, updatedContent, {encoding: 'utf8'});
updatedCount++;

// Upload modified parent file to R2 if configured
// Collect R2 uploads needed (will be uploaded in parallel below)
if (accessKeyId && secretAccessKey && existingFilesOnR2) {
const fileHash = md5(updatedContent);
const existingHash = existingFilesOnR2.get(parentPath);
if (existingHash !== fileHash) {
const s3Client = getS3Client();
await uploadToCFR2(s3Client, parentPath, updatedContent);
r2Uploads.push({parentPath, updatedContent});
}
}
}
}

// Upload all modified section index files to R2 in parallel
if (r2Uploads.length > 0) {
const limit = pLimit(50);
const s3Client = getS3Client();
await Promise.all(
r2Uploads.map(({parentPath, updatedContent}) =>
limit(() => uploadToCFR2(s3Client, parentPath, updatedContent))
)
);
console.log(`📤 Uploaded ${r2Uploads.length} section index files to R2`);
}
console.log(`📑 Added child page listings to ${updatedCount} section index files`);

// Upload index.md to R2 if configured
Expand Down