build: add explicit failure if attestations are not supported on buil…

…dkitd Signed-off-by: Justin Chadwell <me@jedevc.com>
docker · Nov 24, 2022 · 78fc5ed · 78fc5ed
1 parent 884ef62
commit 78fc5ed
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/build/build.go b/build/build.go
@@ -592,6 +592,11 @@ func toSolveOpt(ctx context.Context, di DriverInfo, multiDriver bool, opt Option
 		}
 	}
 
+	if len(opt.Attests) > 0 {
+		if !bopts.LLBCaps.Contains(apicaps.CapID("exporter.image.attestations")) {
+			return nil, nil, errors.Errorf("attestations are not supported by the current buildkitd")
+		}
+	}
 	for k, v := range opt.Attests {
 		so.FrontendAttrs[k] = v
 	}