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cli/registry/client: remove some redundant conditions 

Remove some redundant error-checks or combine them. Also made a small
optimisation when initialising a slice.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2023-08-29 09:36:18 +02:00
parent bd9f60b70d
commit 9ad0792443
No known key found for this signature in database
GPG Key ID: 76698F39D527CE8C
1 changed files with 9 additions and 25 deletions
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34
cli/registry/client/fetcher.go
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@ -31,17 +31,9 @@ func fetchManifest(ctx context.Context, repo distribution.Repository, ref refere
switch v := manifest.(type) {
// Removed Schema 1 support
case *schema2.DeserializedManifest:
imageManifest, err := pullManifestSchemaV2(ctx, ref, repo, *v)
if err != nil {
return types.ImageManifest{}, err
}
return imageManifest, nil
return pullManifestSchemaV2(ctx, ref, repo, *v)
case *ocischema.DeserializedManifest:
imageManifest, err := pullManifestOCISchema(ctx, ref, repo, *v)
if err != nil {
return types.ImageManifest{}, err
}
return imageManifest, nil
return pullManifestOCISchema(ctx, ref, repo, *v)
case *manifestlist.DeserializedManifestList:
return types.ImageManifest{}, errors.Errorf("%s is a manifest list", ref)
}
@ -56,11 +48,7 @@ func fetchList(ctx context.Context, repo distribution.Repository, ref reference.
switch v := manifest.(type) {
case *manifestlist.DeserializedManifestList:
imageManifests, err := pullManifestList(ctx, ref, repo, *v)
if err != nil {
return nil, err
}
return imageManifests, nil
return pullManifestList(ctx, ref, repo, *v)
default:
return nil, errors.Errorf("unsupported manifest format: %v", v)
}
@ -154,11 +142,8 @@ func validateManifestDigest(ref reference.Named, mfst distribution.Manifest) (oc
}
// If pull by digest, then verify the manifest digest.
if digested, isDigested := ref.(reference.Canonical); isDigested {
if digested.Digest() != desc.Digest {
err := errors.Errorf("manifest verification failed for digest %s", digested.Digest())
return ocispec.Descriptor{}, err
}
if digested, isDigested := ref.(reference.Canonical); isDigested && digested.Digest() != desc.Digest {
return ocispec.Descriptor{}, errors.Errorf("manifest verification failed for digest %s", digested.Digest())
}
return desc, nil
@ -167,12 +152,11 @@ func validateManifestDigest(ref reference.Named, mfst distribution.Manifest) (oc
// pullManifestList handles "manifest lists" which point to various
// platform-specific manifests.
func pullManifestList(ctx context.Context, ref reference.Named, repo distribution.Repository, mfstList manifestlist.DeserializedManifestList) ([]types.ImageManifest, error) {
infos := []types.ImageManifest{}
if _, err := validateManifestDigest(ref, mfstList); err != nil {
return nil, err
}
infos := make([]types.ImageManifest, 0, len(mfstList.Manifests))
for _, manifestDescriptor := range mfstList.Manifests {
manSvc, err := repo.Manifests(ctx)
if err != nil {
@ -217,12 +201,12 @@ func continueOnError(err error) bool {
}
return continueOnError(v[0])
case errcode.Error:
e := err.(errcode.Error)
switch e.Code {
switch e := err.(errcode.Error); e.Code {
case errcode.ErrorCodeUnauthorized, v2.ErrorCodeManifestUnknown, v2.ErrorCodeNameUnknown:
return true
}
default:
return false
}
case *distclient.UnexpectedHTTPResponseError:
return true
}