add event for image build

upon image build completion, a new image type event is written for "build". more intricate details, like pulling an image, that might be done by build must be implemented in different vendored packages only after libpod is split from podman.

Fixes: #7022

Signed-off-by: Brent Baude <bbaude@redhat.com>

libpod/events/config.go

@@ -101,6 +101,8 @@ const (
 	Attach Status = "attach"
 	// AutoUpdate ...
 	AutoUpdate Status = "auto-update"
+	// Build ...
+	Build Status = "build"
 	// Checkpoint ...
 	Checkpoint Status = "checkpoint"
 	// Cleanup ...

libpod/events/events.go

@@ -127,6 +127,8 @@ func StringToStatus(name string) (Status, error) {
 	switch name {
 	case Attach.String():
 		return Attach, nil
+	case Build.String():
+		return Build, nil
 	case Checkpoint.String():
 		return Checkpoint, nil
 	case Cleanup.String():

libpod/runtime_img.go

@@ -17,6 +17,7 @@ import (
 	"github.com/containers/image/v5/oci/layout"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/podman/v2/libpod/define"
+	"github.com/containers/podman/v2/libpod/events"
 	"github.com/containers/podman/v2/libpod/image"
 	"github.com/containers/podman/v2/pkg/util"
 	"github.com/containers/storage"
@@ -150,9 +151,21 @@ func removeStorageContainers(ctrIDs []string, store storage.Store) error {
 	return nil
 }
 
+// newBuildEvent creates a new event based on completion of a built image
+func (r *Runtime) newImageBuildCompleteEvent(idOrName string) {
+	e := events.NewEvent(events.Build)
+	e.Type = events.Image
+	e.Name = idOrName
+	if err := r.eventer.Write(e); err != nil {
+		logrus.Errorf("unable to write build event: %q", err)
+	}
+}
+
 // Build adds the runtime to the imagebuildah call
 func (r *Runtime) Build(ctx context.Context, options imagebuildah.BuildOptions, dockerfiles ...string) (string, reference.Canonical, error) {
 	id, ref, err := imagebuildah.BuildDockerfiles(ctx, r.store, options, dockerfiles...)
+	// Write event for build completion
+	r.newImageBuildCompleteEvent(id)
 	return id, ref, err
 }