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server: Add comment to clarify use of regex
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@ -61,6 +61,7 @@ async function exportToZip(taskContext: TaskContext, branch: BBranch, format: "h
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// Crop fileName to avoid its length exceeding 30 and prevent cutting into the extension.
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if (fileName.length > 30) {
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// We use regex to match the extension to preserve multiple dots in extensions (e.g. .tar.gz).
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let match = fileName.match(/(\.[a-zA-Z0-9_.!#-]+)$/);
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let ext = match ? match[0] : '';
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// Crop the extension if extension length exceeds 30
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