Make Go not panic on a partial container update

Right now, if you call Update with only part of the options struct added, it panics. This fixes that by only adding them if they are not nil.

Signed-off-by: Astrid Gealer <astrid@gealer.email>

pkg/bindings/containers/update.go

@@ -26,13 +26,21 @@ func Update(ctx context.Context, options *types.ContainerUpdateOptions) (string,
 			params.Set("restartRetries", strconv.Itoa(int(*options.RestartRetries)))
 		}
 	}
+
 	updateEntities := &handlers.UpdateEntities{
-		LinuxResources:               *options.Resources,
-		UpdateHealthCheckConfig:      *options.ChangedHealthCheckConfiguration,
-		UpdateContainerDevicesLimits: *options.DevicesLimits,
-		Env:                          options.Env,
-		UnsetEnv:                     options.UnsetEnv,
+		Env:      options.Env,
+		UnsetEnv: options.UnsetEnv,
 	}
+	if options.Resources != nil {
+		updateEntities.LinuxResources = *options.Resources
+	}
+	if options.ChangedHealthCheckConfiguration != nil {
+		updateEntities.UpdateHealthCheckConfig = *options.ChangedHealthCheckConfiguration
+	}
+	if options.DevicesLimits != nil {
+		updateEntities.UpdateContainerDevicesLimits = *options.DevicesLimits
+	}
+
 	requestData, err := jsoniter.MarshalToString(updateEntities)
 	if err != nil {
 		return "", err

pkg/bindings/test/containers_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/containers/podman/v5/pkg/bindings"
 	"github.com/containers/podman/v5/pkg/bindings/containers"
 	"github.com/containers/podman/v5/pkg/domain/entities/reports"
+	"github.com/containers/podman/v5/pkg/domain/entities/types"
 	"github.com/containers/podman/v5/pkg/specgen"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
@@ -802,4 +803,15 @@ var _ = Describe("Podman containers ", func() {
 		Expect(c).To(HaveLen(1))
 		Expect(c[0].PodName).To(Equal(podName))
 	})
+
+	It("Update container allows for partial updates", func() {
+		var name = "top"
+		_, err := bt.RunTopContainer(&name, nil)
+		Expect(err).ToNot(HaveOccurred())
+
+		_, err = containers.Update(bt.conn, &types.ContainerUpdateOptions{
+			NameOrID: name,
+		})
+		Expect(err).ToNot(HaveOccurred())
+	})
 })