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Handle empty thumbnail specification #52

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Merged
stefanv merged 2 commits into from
Nov 19, 2025
Merged

Handle empty thumbnail specification #52

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6942887
Handle empty thumbnail specification
stefanv Nov 19, 2025
b1515b9
Avoid changing return type of thumbnailURL
stefanv Nov 19, 2025
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7 changes: 7 additions & 0 deletions src/utils.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -41,8 +41,15 @@ export function downloadUrl(kind: string, source: string, ref: string, isTag = f

// https://raw.githubusercontent.com/myst-templates/arxiv_nips/main/thumbnail.png
export function thumbnailUrl(source: string, thumbnail: string, ref: string) {
// Thumbnail wasn't specified; nothing we can do
if (!thumbnail) return '';

const parts = getGithubParts(source);

// If we don't have a GitHub source URL, then the thumbnail has to be absolute; return as-is
if (!parts) return thumbnail;

// GitHub source and thumbnail path provided; assume thumbnail path is relative
const relative = thumbnail.replace(/^\.?\//, '');
return `https://raw.githubusercontent.com/${parts.org}/${parts.repo}/${ref}/${relative}`;
}
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