@mintlify/prebuild/dist/prebuild/update/preserveAutoGeneratedMetadata.js

Helpful functions for Mintlify's prebuild step

import { parseFrontmatter } from '@mintlify/common';
/**
 * When user MDX doesn't explicitly set title/description, preserve the
 * auto-generated values (e.g. from OpenAPI schemas) that already exist
 * in pagesAcc. Mutates pageMetadata and pagesAcc in place.
 */
export const preserveAutoGeneratedMetadata = (contentStr, slug, pageMetadata, pagesAcc) => {
    const existing = pagesAcc[slug];
    if (existing) {
        try {
            const frontmatter = parseFrontmatter(contentStr).attributes;
            if (!frontmatter.title && existing.title)
                pageMetadata.title = existing.title;
            if (!frontmatter.description && existing.description)
                pageMetadata.description = existing.description;
            if (!frontmatter.sidebarTitle && existing.sidebarTitle)
                pageMetadata.sidebarTitle = existing.sidebarTitle;
        }
        catch { }
    }
    pagesAcc[slug] = pageMetadata;
};