Fix podman-remote run --attach stdin to show container ID

Signed-off-by: Boaz Shuster <boaz.shuster.github@gmail.com>

pkg/domain/infra/tunnel/containers.go

@@ -620,6 +620,9 @@ func (ic *ContainerEngine) ContainerExecDetached(ctx context.Context, nameOrID s
 }
 
 func startAndAttach(ic *ContainerEngine, name string, detachKeys *string, input, output, errput *os.File) error {
+	if output == nil && errput == nil {
+		fmt.Printf("%s\n", name)
+	}
 	attachErr := make(chan error)
 	attachReady := make(chan bool)
 	options := new(containers.AttachOptions).WithStream(true)

test/system/030-run.bats

@@ -892,4 +892,14 @@ $IMAGE--c_ok" \
     run_podman container rm -f -t 0 c_ok c_fail_no_rm
 }
 
+@test "podman run --attach stdin prints container ID" {
+    ctr_name="container-$(random_string 5)"
+    run_podman run --name $ctr_name --attach stdin $IMAGE echo hello
+    run_output=$output
+    run_podman inspect --format "{{.Id}}" $ctr_name
+    ctr_id=$output
+    is "$run_output" "$ctr_id" "Did not find container ID in the output"
+    run_podman rm $ctr_name
+}
+
 # vim: filetype=sh