Function diffCatalogMaps

packages/bumpy/src/utils/package-manager.ts:205–225

(before: CatalogMap, after: CatalogMap)

 * Includes added, removed, and version-changed entries.
 */
export function diffCatalogMaps(before: CatalogMap, after: CatalogMap): Map<string, Set<string>> {
  const changes = new Map<string, Set<string>>();
  const catalogNames = new Set([...before.keys(), ...after.keys()]);

  for (const catalogName of catalogNames) {
    const beforeDeps = before.get(catalogName) ?? {};
    const afterDeps = after.get(catalogName) ?? {};
    const depNames = new Set([...Object.keys(beforeDeps), ...Object.keys(afterDeps)]);
    const changedDeps = new Set<string>();
    for (const depName of depNames) {
      if (beforeDeps[depName] !== afterDeps[depName]) {
        changedDeps.add(depName);
      }
    }
    if (changedDeps.size > 0) {
      changes.set(catalogName, changedDeps);
    }
  }

  return changes;
}

/**
 * Given a set of catalog entries that have changed, return the set of catalog