Add handling of "local-registry"

Signed-off-by: C0D3 M4513R <[email protected]>

syft/pkg/cataloger/rust/repository.go

@@ -12,6 +12,7 @@ import (
 	"github.com/go-git/go-git/v5/storage/memory"
 	"io"
 	"net/http"
+	"os"
 	"strings"
 )
 
@@ -55,6 +56,13 @@ var RegistryConfig = make(map[string]RepositoryConfig)
 const RepositoryConfigName = "config.json"
 
 func (i *SourceId) GetConfig() (*RepositoryConfig, error) {
+	if i.kind == SourceKindLocalRegistry {
+		return &RepositoryConfig{
+			Download:     i.url,
+			API:          "",
+			AuthRequired: false,
+		}, nil
+	}
 	if repoConfig, ok := RegistryConfig[i.url]; ok {
 		return &repoConfig, nil
 	}
@@ -74,6 +82,11 @@ func (i *SourceId) GetConfig() (*RepositoryConfig, error) {
 func (i *SourceId) GetPath(path string) ([]byte, error) {
 	var content []byte
 	switch i.kind {
+	case SourceKindLocalRegistry:
+		if path == RepositoryConfigName {
+			return nil, nil
+		}
+		return os.ReadFile(fmt.Sprintf("%s/index/%s", i.url, path))
 	case SourceKindSparse:
 		var resp, err = http.Get(fmt.Sprintf("%s/%s", i.url, path))
 		if err != nil {