Worker/osbuild: include osbuild version in OSBuildJobResult

This will make it easier to reproduce image builds using the same
tooling which was used by the worker.

This change will enable to include the osbuild version in Koji build
metadata.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

cmd/osbuild-worker/jobimpl-osbuild.go

@@ -341,6 +341,13 @@ func (impl *OSBuildJobImpl) Run(job worker.Job) error {
 		}
 	}()
 
+	osbuildVersion, err := osbuild.OSBuildVersion()
+	if err != nil {
+		osbuildJobResult.JobError = clienterrors.WorkerClientError(clienterrors.ErrorBuildJob, "Error getting osbuild binary version", err)
+		return err
+	}
+	osbuildJobResult.OSBuildVersion = osbuildVersion
+
 	// Read the job specification
 	var jobArgs worker.OSBuildJob
 	err = job.Args(&jobArgs)

internal/worker/json.go

@@ -63,6 +63,8 @@ type OSBuildJobResult struct {
 	// Boot mode supported by the image
 	// (string representation of distro.BootMode values)
 	ImageBootMode string `json:"image_boot_mode,omitempty"`
+	// Version of the osbuild binary used by the worker to build the image
+	OSBuildVersion string `json:"osbuild_version,omitempty"`
 	JobResult
 }