vendor latest c/common

Includes the default db backend changes.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/containers/common/pkg/config/db_backend.go

@@ -13,6 +13,12 @@ const (
 	// SQLite backend.
 	DBBackendSQLite
 
+	// DBBackendDefault describes that no explicit backend has been set.
+	// It should default to sqlite unless there is already an existing boltdb,
+	// this allows for backwards compatibility on upgrades. The actual detection
+	// logic must live in podman as we only know there were to look for the file.
+	DBBackendDefault
+
 	stringBoltDB = "boltdb"
 	stringSQLite = "sqlite"
 )
@@ -24,6 +30,8 @@ func (d DBBackend) String() string {
 		return stringBoltDB
 	case DBBackendSQLite:
 		return stringSQLite
+	case DBBackendDefault:
+		return ""
 	default:
 		return fmt.Sprintf("unsupported database backend: %d", d)
 	}
@@ -32,7 +40,7 @@ func (d DBBackend) String() string {
 // Validate returns whether the DBBackend is supported.
 func (d DBBackend) Validate() error {
 	switch d {
-	case DBBackendBoltDB, DBBackendSQLite:
+	case DBBackendBoltDB, DBBackendSQLite, DBBackendDefault:
 		return nil
 	default:
 		return fmt.Errorf("unsupported database backend: %d", d)
@@ -49,12 +57,9 @@ func ParseDBBackend(raw string) (DBBackend, error) {
 		return DBBackendBoltDB, nil
 	case stringSQLite:
 		return DBBackendSQLite, nil
+	case "":
+		return DBBackendDefault, nil
 	default:
 		return DBBackendUnsupported, fmt.Errorf("unsupported database backend: %q", raw)
 	}
 }
-
-// DBBackend returns the configured database backend.
-func (c *Config) DBBackend() (DBBackend, error) {
-	return ParseDBBackend(c.Engine.DBBackend)
-}