25 lines
1.0 KiB
TypeScript
25 lines
1.0 KiB
TypeScript
/**
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* Pure, deterministic dedup key for maintenance threads.
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*
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* Derives a stable key from the merge-base + head SHAs so that repeated
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* scheduled sync runs against the same upstream state collapse onto a single
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* maintenance thread instead of creating a new one each run. NEVER involves
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* Date.now()/random — the key must be identical for identical inputs.
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*
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* Returns `null` when the head SHA is missing/empty (unresolvable head → the
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* caller cannot dedup and should SKIP thread creation rather than mint a
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* unique key).
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*/
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export const maintenanceDedupKey = (input: {
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mergeBaseSha?: string;
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headSha?: string;
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}): string | null => {
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const head = input.headSha?.trim();
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if (!head) return null;
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// Intentional `||`: an empty/whitespace merge base must collapse to the
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// 'nobase' sentinel, which `??` would not do (it keeps the empty string).
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// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
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const base = input.mergeBaseSha?.trim() || 'nobase';
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return `${base}:${head}`;
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};
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