Add support for podman image digests

internal/pkg/cli/deploy/workload.go

@@ -593,6 +593,7 @@ func buildArgsPerContainer(name, workspacePath string, img ContainerImageIdentif
 			CacheFrom:  buildArgs.CacheFrom,
 			Target:     aws.StringValue(buildArgs.Target),
 			Platform:   mf.ContainerPlatform(),
+			Engine:     aws.StringValue(buildArgs.Engine),
 			Tags:       tags,
 			Labels:     labels,
 		}

internal/pkg/docker/dockerengine/dockerengine.go

@@ -90,6 +90,7 @@ type BuildArguments struct {
 	Platform          string            // Optional. OS/Arch to pass to `docker build`.
 	Args              map[string]string // Optional. Build args to pass via `--build-arg` flags. Equivalent to ARG directives in dockerfile.
 	Labels            map[string]string // Required. Set metadata for an image.
+	Engine            string            // Optional. Currently supported options are "docker" and "podman". Defaults to "docker".
 }
 
 // RunOptions holds the options for running a Docker container.
@@ -232,12 +233,22 @@ func (c DockerCmdClient) Exec(ctx context.Context, container string, out io.Writ
 }
 
 // Push pushes the images with the specified tags and ecr repository URI, and returns the image digest on success.
-func (c DockerCmdClient) Push(ctx context.Context, uri string, w io.Writer, tags ...string) (digest string, err error) {
+func (c DockerCmdClient) Push(ctx context.Context, uri string, engine string, w io.Writer, tags ...string) (digest string, err error) {
 	images := []string{}
 	for _, tag := range tags {
 		images = append(images, imageName(uri, tag))
 	}
 	var args []string
+	// Podman image digests are based on the compressed image, so need to be gathered from podman.
+	var digestFile *os.File
+	if engine == "podman" {
+		digestFile, err = os.CreateTemp("", "copilot-digest")
+		if err != nil {
+			return "", fmt.Errorf("create temp file for digest: %w", err)
+		}
+		defer os.Remove(digestFile.Name())
+		args = append(args, "--digestfile", digestFile.Name())
+	}
 	if ci, _ := c.lookupEnv("CI"); ci == "true" {
 		args = append(args, "--quiet")
 	}
@@ -247,6 +258,14 @@ func (c DockerCmdClient) Push(ctx context.Context, uri string, w io.Writer, tags
 			return "", fmt.Errorf("docker push %s: %w", img, err)
 		}
 	}
+	if engine == "podman" {
+		digest, err := os.ReadFile(digestFile.Name())
+		if err != nil {
+			return "", fmt.Errorf("read digest file: %w", err)
+		}
+		return string(digest), nil
+	}
+
 	buf := new(strings.Builder)
 	// The container image will have the same digest regardless of the associated tag.
 	// Pick the first tag and get the image's digest.

internal/pkg/docker/dockerengine/dockerengine_test.go

@@ -45,6 +45,7 @@ func TestDockerCommand_Build(t *testing.T) {
 		args              map[string]string
 		target            string
 		cacheFrom         []string
+		engine            string
 		envVars           map[string]string
 		labels            map[string]string
 		setupMocks        func(controller *gomock.Controller)
@@ -313,7 +314,7 @@ func TestDockerCommand_Push(t *testing.T) {
 			lookupEnv: emptyLookupEnv,
 		}
 		buf := new(strings.Builder)
-		digest, err := cmd.Push(ctx, "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", buf, "latest", "g123bfc")
+		digest, err := cmd.Push(ctx, "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", "docker", buf, "latest", "g123bfc")
 
 		// THEN
 		require.NoError(t, err)
@@ -343,7 +344,7 @@ func TestDockerCommand_Push(t *testing.T) {
 			},
 		}
 		buf := new(strings.Builder)
-		digest, err := cmd.Push(context.Background(), "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", buf, "latest")
+		digest, err := cmd.Push(context.Background(), "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", "docker", buf, "latest")
 
 		// THEN
 		require.NoError(t, err)
@@ -362,7 +363,7 @@ func TestDockerCommand_Push(t *testing.T) {
 			lookupEnv: emptyLookupEnv,
 		}
 		buf := new(strings.Builder)
-		_, err := cmd.Push(ctx, "uri", buf, "latest")
+		_, err := cmd.Push(ctx, "uri", "docker", buf, "latest")
 
 		// THEN
 		require.EqualError(t, err, "docker push uri:latest: some error")
@@ -381,7 +382,7 @@ func TestDockerCommand_Push(t *testing.T) {
 			lookupEnv: emptyLookupEnv,
 		}
 		buf := new(strings.Builder)
-		_, err := cmd.Push(ctx, "uri", buf, "latest")
+		_, err := cmd.Push(ctx, "uri", "docker", buf, "latest")
 
 		// THEN
 		require.EqualError(t, err, "inspect image digest for uri: some error")
@@ -406,7 +407,7 @@ func TestDockerCommand_Push(t *testing.T) {
 			lookupEnv: emptyLookupEnv,
 		}
 		buf := new(strings.Builder)
-		_, err := cmd.Push(ctx, "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", buf, "latest", "g123bfc")
+		_, err := cmd.Push(ctx, "aws_account_id.dkr.ecr.region.amazonaws.com/my-web-app", "docker", buf, "latest", "g123bfc")
 
 		// THEN
 		require.EqualError(t, err, "parse the digest from the repo digest ''")

internal/pkg/manifest/workload.go

@@ -178,6 +178,7 @@ func (i *ImageLocationOrBuild) BuildConfig(rootDirectory string) *DockerBuildArg
 		Args:       i.args(),
 		Target:     i.target(),
 		CacheFrom:  i.cacheFrom(),
+		Engine:     i.engine(),
 	}
 }
 
@@ -238,6 +239,14 @@ func (i *ImageLocationOrBuild) cacheFrom() []string {
 	return i.Build.BuildArgs.CacheFrom
 }
 
+// engine returns the engine to use for building the image if it exists, otherwise "docker"
+func (i *ImageLocationOrBuild) engine() *string {
+	if i.Build.BuildArgs.Engine != nil {
+		return i.Build.BuildArgs.Engine
+	}
+	return aws.String("docker")
+}
+
 // ImageOverride holds fields that override Dockerfile image defaults.
 type ImageOverride struct {
 	EntryPoint EntryPointOverride `yaml:"entrypoint"`
@@ -398,6 +407,7 @@ type DockerBuildArgs struct {
 	Args       map[string]string `yaml:"args,omitempty"`
 	Target     *string           `yaml:"target,omitempty"`
 	CacheFrom  []string          `yaml:"cache_from,omitempty"`
+	Engine     *string           `yaml:"engine,omitempty"`
 }
 
 func (b *DockerBuildArgs) isEmpty() bool {

internal/pkg/repository/repository.go

@@ -18,7 +18,7 @@ import (
 type ContainerLoginBuildPusher interface {
 	Build(ctx context.Context, args *dockerengine.BuildArguments, w io.Writer) error
 	Login(uri, username, password string) error
-	Push(ctx context.Context, uri string, w io.Writer, tags ...string) (digest string, err error)
+	Push(ctx context.Context, uri string, engine string, w io.Writer, tags ...string) (digest string, err error)
 	IsEcrCredentialHelperEnabled(uri string) bool
 }
 
@@ -77,10 +77,11 @@ func (r *Repository) BuildAndPush(ctx context.Context, args *dockerengine.BuildA
 		return "", fmt.Errorf("build Dockerfile at %s: %w", args.Dockerfile, err)
 	}
 
-	digest, err = r.docker.Push(ctx, args.URI, w, args.Tags...)
+	digest, err = r.docker.Push(ctx, args.URI, args.Engine, w, args.Tags...)
 	if err != nil {
 		return "", fmt.Errorf("push to repo %s: %w", r.name, err)
 	}
+
 	return digest, nil
 }