refactor: docker build BuildContext field (#1914)

The old Container input parameter was not flexible enough

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/container/container_types.go

@@ -55,7 +55,7 @@ type Container interface {
 type NewDockerBuildExecutorInput struct {
 	ContextDir   string
 	Dockerfile   string
-	Container  Container
+	BuildContext io.Reader
 	ImageTag     string
 	Platform     string
 }

pkg/container/docker_build.go

@@ -48,8 +48,8 @@ func NewDockerBuildExecutor(input NewDockerBuildExecutorInput) common.Executor {
 			Dockerfile:  input.Dockerfile,
 		}
 		var buildContext io.ReadCloser
-		if input.Container != nil {
+		if input.BuildContext != nil {
-			buildContext, err = input.Container.GetContainerArchive(ctx, input.ContextDir+"/.")
+			buildContext = io.NopCloser(input.BuildContext)
 		} else {
 			buildContext, err = createBuildContext(ctx, input.ContextDir, input.Dockerfile)
 		}

pkg/runner/action.go

@@ -257,15 +257,19 @@ func execAsDocker(ctx context.Context, step actionStep, actionName string, based
 
 		if !correctArchExists || rc.Config.ForceRebuild {
 			logger.Debugf("image '%s' for architecture '%s' will be built from context '%s", image, rc.Config.ContainerArchitecture, contextDir)
-			var actionContainer container.Container
+			var buildContext io.ReadCloser
 			if localAction {
-				actionContainer = rc.JobContainer
+				buildContext, err = rc.JobContainer.GetContainerArchive(ctx, contextDir+"/.")
+				if err != nil {
+					return err
+				}
+				defer buildContext.Close()
 			}
 			prepImage = container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
 				ContextDir:   contextDir,
 				Dockerfile:   fileName,
 				ImageTag:     image,
-				Container:  actionContainer,
+				BuildContext: buildContext,
 				Platform:     rc.Config.ContainerArchitecture,
 			})
 		} else {