func IsOLMBundleImage()

in tooling/mcerepkg/internal/olm/extract.go [113:147]

• 32 lines of code
• 11 McCabe index (conditional complexity)

func IsOLMBundleImage(image containerregistrypkgv1.Image) (isOLM bool, err error) {
	var (
		packageManifestFound bool
		manifestsFolderFound bool
		metadataFolderFound  bool
	)

	reader := mutate.Extract(image)
	defer func() {
		if cErr := reader.Close(); err == nil && cErr != nil {
			err = cErr
		}
	}()
	tarReader := tar.NewReader(reader)

	for {
		hdr, err := tarReader.Next()
		if err != nil && errors.Is(err, io.EOF) {
			break
		}

		pkgManifestPath := filepath.Join(OCIPathPrefix, PackageManifestFilename)
		switch hdr.Name {
		case pkgManifestPath + ".yml", pkgManifestPath + ".yaml":
			packageManifestFound = true
		}
		if strings.HasPrefix(hdr.Name, olmManifestFolder+"/") {
			manifestsFolderFound = true
		}
		if strings.HasPrefix(hdr.Name, olmMetadataFolder+"/") {
			metadataFolderFound = true
		}
	}
	return !packageManifestFound && manifestsFolderFound && metadataFolderFound, nil
}