Fix Container List API call to return mount info

We are hard coding mounts to return nil in compat API,
since we have the data, we should return it.

Fixes: https://github.com/containers/podman/issues/12734

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

pkg/api/handlers/compat/containers.go

@@ -356,6 +356,15 @@ func LibpodToContainer(l *libpod.Container, sz bool) (*handlers.Container, error
 		return nil, err
 	}
 
+	m, err := json.Marshal(inspect.Mounts)
+	if err != nil {
+		return nil, err
+	}
+	mounts := []types.MountPoint{}
+	if err := json.Unmarshal(m, &mounts); err != nil {
+		return nil, err
+	}
+
 	return &handlers.Container{Container: types.Container{
 		ID:         l.ID(),
 		Names:      []string{fmt.Sprintf("/%s", l.Name())},
@@ -374,7 +383,7 @@ func LibpodToContainer(l *libpod.Container, sz bool) (*handlers.Container, error
 		}{
 			"host"},
 		NetworkSettings: &networkSettings,
-		Mounts:          nil,
+		Mounts:          mounts,
 	},
 		ContainerCreateConfig: types.ContainerCreateConfig{},
 	}, nil

test/apiv2/20-containers.at

@@ -18,7 +18,7 @@ podman rm -a -f &>/dev/null
 
 t GET "libpod/containers/json (at start: clean slate)" 200 length=0
 
-podman run $IMAGE true
+podman run -v /tmp:/tmp $IMAGE true
 
 t GET libpod/containers/json 200 length=0
 
@@ -33,6 +33,7 @@ t GET libpod/containers/json?all=true 200 \
   .[0].Command[0]="true" \
   .[0].State~\\\(exited\\\|stopped\\\) \
   .[0].ExitCode=0 \
+  .[0].Mounts~.*/tmp \
   .[0].IsInfra=false
 
 # Test compat API for Network Settings (.Network is N/A when rootless)
@@ -44,6 +45,7 @@ t GET /containers/json?all=true 200 \
   length=1 \
   .[0].Id~[0-9a-f]\\{64\\} \
   .[0].Image=$IMAGE \
+  .[0].Mounts~.*/tmp \
   $network_expect
 
 # compat API imageid with sha256: prefix