Function packageJsonAffectsRelease

packages/bumpy/src/commands/check.ts:333–375

* Decide whether a package's `package.json` change is release-affecting — i.e. whether * a bump file should be required for it. Diffs the file against the base ref and returns * true if any top-level field changed *other* than the ignored ones (default: * `devDependencies`). A changed `devDepende

(
  rootDir: string,
  baseRef: string,
  pkgRelDir: string,
  ignoredFields: string[],
  releaseTriggeringDevDeps?: string[],
)

 * file, a deleted file, or unparseable JSON.
 */
async function packageJsonAffectsRelease(
  rootDir: string,
  baseRef: string,
  pkgRelDir: string,
  ignoredFields: string[],
  releaseTriggeringDevDeps?: string[],
): Promise<boolean> {
  const relPath = pkgRelDir ? `${pkgRelDir}/package.json` : 'package.json';
  const beforeRaw = readFileAtRef(rootDir, baseRef, relPath);
  if (beforeRaw == null) return true; // not present at base (new package) → release-affecting

  const afterPath = resolve(rootDir, relPath);
  const afterRaw = (await exists(afterPath)) ? await readText(afterPath) : null;
  if (afterRaw == null) return true; // removed in the working tree → be conservative

  let before: Record<string, unknown>;
  let after: Record<string, unknown>;
  try {
    before = JSON.parse(beforeRaw);
    after = JSON.parse(afterRaw);
  } catch {
    return true; // unparseable → can't tell, so require a bump file
  }

  const ignored = new Set(ignoredFields);
  const keys = new Set([...Object.keys(before), ...Object.keys(after)]);
  for (const key of keys) {
    if (deepEqual(before[key], after[key])) continue;
    if (!ignored.has(key)) return true; // a publish-affecting field changed
    // The field is ignored — but a release-relevant devDependency change still affects output.
    if (
      key === 'devDependencies' &&
      releaseTriggeringDevDepsChanged(
        before.devDependencies as Record<string, string> | undefined,
        after.devDependencies as Record<string, string> | undefined,
        releaseTriggeringDevDeps,
      )
    ) {
      return true;
    }
  }
  return false;
}

/** Whether any devDependency matching `releaseTriggeringDevDeps` was added/removed/changed. */
function releaseTriggeringDevDepsChanged(