export function assertChangesAllowForTargetLabel()

in ng-dev/pr/common/validation/validations.ts [26:71]
38 lines of code
12 McCabe index (conditional complexity)

export function assertChangesAllowForTargetLabel(
  commits: Commit[],
  label: TargetLabel,
  config: PullRequestConfig,
  releaseTrains: ActiveReleaseTrains,
) {
  /**
   * List of commit scopes which are exempted from target label content requirements. i.e. no `feat`
   * scopes in patch branches, no breaking changes in minor or patch changes.
   */
  const exemptedScopes = config.targetLabelExemptScopes || [];
  /** List of commits which are subject to content requirements for the target label. */
  commits = commits.filter((commit) => !exemptedScopes.includes(commit.scope));
  const hasBreakingChanges = commits.some((commit) => commit.breakingChanges.length !== 0);
  const hasDeprecations = commits.some((commit) => commit.deprecations.length !== 0);
  const hasFeatureCommits = commits.some((commit) => commit.type === 'feat');
  switch (label.name) {
    case TargetLabelName.MAJOR:
      break;
    case TargetLabelName.MINOR:
      if (hasBreakingChanges) {
        throw PullRequestFailure.hasBreakingChanges(label);
      }
      break;
    case TargetLabelName.RELEASE_CANDIDATE:
    case TargetLabelName.LONG_TERM_SUPPORT:
    case TargetLabelName.PATCH:
      if (hasBreakingChanges) {
        throw PullRequestFailure.hasBreakingChanges(label);
      }
      if (hasFeatureCommits) {
        throw PullRequestFailure.hasFeatureCommits(label);
      }
      // Deprecations should not be merged into RC, patch or LTS branches.
      // https://semver.org/#spec-item-7. Deprecations should be part of
      // minor releases, or major releases according to SemVer.
      if (hasDeprecations && !releaseTrains.isFeatureFreeze()) {
        throw PullRequestFailure.hasDeprecations(label);
      }
      break;
    default:
      warn(red('WARNING: Unable to confirm all commits in the pull request are eligible to be'));
      warn(red(`merged into the target branch: ${label.name}`));
      break;
  }
}