add db curator

Signed-off-by: Alex Goodman <[email protected]>

grype/db/v6/db.go

@@ -35,6 +35,14 @@ type Writer interface {
 	io.Closer
 }
 
+type Curator interface {
+	Reader() (Reader, error)
+	Status() Status
+	Delete() error
+	Update() (bool, error)
+	Import(dbArchivePath string) error
+}
+
 type Config struct {
 	DBDirPath string
 }

grype/db/v6/description.go

@@ -1,7 +1,9 @@
 package v6
 
 import (
+	"encoding/json"
 	"fmt"
+	"io"
 	"path"
 	"time"
 
@@ -85,3 +87,17 @@ func NewDescriptionFromDir(fs afero.Fs, dir string) (*Description, error) {
 func (m Description) String() string {
 	return fmt.Sprintf("DB(version=%s built=%s checksum=%s)", m.SchemaVersion, m.Built, m.Checksum)
 }
+
+func writeDescription(writer io.Writer, m Description) error {
+	if m.SchemaVersion == "" {
+		return fmt.Errorf("missing schema version")
+	}
+
+	contents, err := json.MarshalIndent(m, "", " ")
+	if err != nil {
+		return fmt.Errorf("failed to encode metadata file: %w", err)
+	}
+
+	_, err = writer.Write(contents)
+	return err
+}

grype/db/v6/description_test.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"os"
 	"path"
+	"strings"
 	"testing"
 	"time"
 
@@ -125,3 +126,24 @@ func TestTime_JSONUnmarshalling(t *testing.T) {
 		})
 	}
 }
+
+func TestDatabaseDescription_Write(t *testing.T) {
+
+	validDescription := Description{
+		SchemaVersion: "1.0.0",
+		Built:         Time{Time: time.Date(2023, 9, 26, 12, 2, 3, 0, time.UTC)},
+		Checksum:      "xxh64:dummychecksum",
+	}
+
+	sb := strings.Builder{}
+
+	err := writeDescription(&sb, validDescription)
+	require.NoError(t, err)
+
+	expected := fmt.Sprintf(`{
+ "schemaVersion": "1.0.0",
+ "built": "2023-09-26T12:02:03Z",
+ "checksum": "xxh64:dummychecksum"
+}`)
+	assert.Equal(t, expected, sb.String())
+}

grype/db/v6/distribution/client.go

@@ -28,8 +28,7 @@ type Config struct {
 	CACert    string
 
 	// validations
-	ValidateByHashOnGet bool
-	RequireUpdateCheck  bool
+	RequireUpdateCheck bool
 
 	// timeouts
 	CheckTimeout  time.Duration
@@ -50,11 +49,10 @@ type client struct {
 
 func DefaultConfig() Config {
 	return Config{
-		LatestURL:           "https://grype.anchore.io/databases/latest.json",
-		ValidateByHashOnGet: true,
-		RequireUpdateCheck:  false,
-		CheckTimeout:        30 * time.Second,
-		UpdateTimeout:       300 * time.Second,
+		LatestURL:          "https://grype.anchore.io/databases/latest.json",
+		RequireUpdateCheck: false,
+		CheckTimeout:       30 * time.Second,
+		UpdateTimeout:      300 * time.Second,
 	}
 }