ValidateGodeps invokes hack/godep-restore.sh whenever it finds at least one commit modifying Godeps/Godeps.json file or vendor/ directory.

ValidateUpstreamCommitModifiesOnlyDeclaredGodepRepo ensures that an upstream commit only modifies the Godep repo the summary declares.

ValidateUpstreamCommitModifiesOnlyGodeps ensures that any Godeps commits modify ONLY Godeps files.

ValidateUpstreamCommitModifiesOnlyKubernetes ensures that an upstream commit doesn't modify any code outside of kube/kube.

ValidateUpstreamCommitModifiesSingleGodepsRepo returns an error if any upstream commits have changes that span more than one Godeps repo.

ValidateUpstreamCommitSummaries ensures that any commits which declare to be upstream match the regular expressions for UPSTREAM summaries.

ValidateUpstreamCommitsWithoutGodepsChanges returns an error if any upstream commits have no Godeps changes.