Function buildCacheKey

src/ui/diff/useHighlightedDiff.ts:82–84

Cache key that includes a content fingerprint so stale entries are never served * after reload. Unchanged files keep their cache hit across reloads.

(theme: AppTheme, file: DiffFile)

/** Cache key that includes a content fingerprint so stale entries are never served
 *  after reload. Unchanged files keep their cache hit across reloads. */
function buildCacheKey(theme: AppTheme, file: DiffFile) {
  return `${theme.id}:${theme.syntaxTheme ?? theme.appearance}:${file.id}:${patchFingerprint(file)}`;
}

/** Only commit a highlight result if the promise is still the active one for that key.
 *  Prevents a superseded or late-resolving promise from overwriting a newer entry. */