Add option to run custom architecture (container platform) (#525)

* Add QEMU to run different architectures

* Update dependencies in `go.mod`

* Add `--container-architecture` flag to specify custom image architecture

Co-authored-by: Casey Lee <cplee@nektos.com>

act/container/docker_images.go

@@ -2,14 +2,15 @@ package container
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
 )
 
 // ImageExistsLocally returns a boolean indicating if an image with the
-// requested name (and tag) exist in the local docker image store
-func ImageExistsLocally(ctx context.Context, imageName string) (bool, error) {
+// requested name, tag and architecture exists in the local docker image store
+func ImageExistsLocally(ctx context.Context, imageName string, platform string) (bool, error) {
 	cli, err := GetDockerClient(ctx)
 	if err != nil {
 		return false, err
@@ -27,5 +28,61 @@ func ImageExistsLocally(ctx context.Context, imageName string) (bool, error) {
 		return false, err
 	}
 
-	return len(images) > 0, nil
+	if len(images) > 0 {
+		if platform == "any" {
+			return true, nil
+		}
+		for _, v := range images {
+			inspectImage, _, err := cli.ImageInspectWithRaw(ctx, v.ID)
+			if err != nil {
+				return false, err
+			}
+
+			if fmt.Sprintf("%s/%s", inspectImage.Os, inspectImage.Architecture) == platform {
+				return true, nil
+			}
+		}
+		return false, nil
+	}
+
+	return false, nil
+}
+
+// DeleteImage removes image from local store, the function is used to run different
+// container image architectures
+func DeleteImage(ctx context.Context, imageName string) (bool, error) {
+	if exists, err := ImageExistsLocally(ctx, imageName, "any"); !exists {
+		return false, err
+	}
+
+	cli, err := GetDockerClient(ctx)
+	if err != nil {
+		return false, err
+	}
+
+	filters := filters.NewArgs()
+	filters.Add("reference", imageName)
+
+	imageListOptions := types.ImageListOptions{
+		Filters: filters,
+	}
+
+	images, err := cli.ImageList(ctx, imageListOptions)
+	if err != nil {
+		return false, err
+	}
+
+	if len(images) > 0 {
+		for _, v := range images {
+			if _, err = cli.ImageRemove(ctx, v.ID, types.ImageRemoveOptions{
+				Force:         true,
+				PruneChildren: true,
+			}); err != nil {
+				return false, err
+			}
+		}
+		return true, nil
+	}
+
+	return false, nil
 }