upgrade libcompose to fbdac0a6a80837c63eb6c8f43514f7bb3f32df6c

vendor/github.com/docker/libcompose/project/project_ps.go

@@ -0,0 +1,24 @@
+package project
+
+import (
+	"golang.org/x/net/context"
+)
+
+// Ps list containers for the specified services.
+func (p *Project) Ps(ctx context.Context, services ...string) (InfoSet, error) {
+	allInfo := InfoSet{}
+	for _, name := range p.ServiceConfigs.Keys() {
+		service, err := p.CreateService(name)
+		if err != nil {
+			return nil, err
+		}
+
+		info, err := service.Info(ctx)
+		if err != nil {
+			return nil, err
+		}
+
+		allInfo = append(allInfo, info...)
+	}
+	return allInfo, nil
+}