Align the podman pod ps --filter behavior with podman ps

Filters with the same key work inclusive with the only exception being
`label` which is exclusive. Filters with different keys always work exclusive.

Also update the documentation with the new behavior.

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

2 files changed, 13 insertions, 18 deletions

diff --git a/pkg/api/handlers/utils/pods.go b/pkg/api/handlers/utils/pods.go
index 54ebe2d29..7506dbfd1 100644
--- a/pkg/api/handlers/utils/pods.go
+++ b/pkg/api/handlers/utils/pods.go
@@ -11,8 +11,7 @@ import (
 
 func GetPods(w http.ResponseWriter, r *http.Request) ([]*entities.ListPodsReport, error) {
 	var (
-		pods    []*libpod.Pod
-		filters []libpod.PodFilter
+		pods []*libpod.Pod
 	)
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
 	decoder := r.Context().Value("decoder").(*schema.Decoder)
@@ -30,14 +29,13 @@ func GetPods(w http.ResponseWriter, r *http.Request) ([]*entities.ListPodsReport
 		UnSupportedParameter("digests")
 	}
 
+	filters := make([]libpod.PodFilter, 0, len(query.Filters))
 	for k, v := range query.Filters {
-		for _, filter := range v {
-			f, err := lpfilters.GeneratePodFilterFunc(k, filter)
-			if err != nil {
-				return nil, err
-			}
-			filters = append(filters, f)
+		f, err := lpfilters.GeneratePodFilterFunc(k, v)
+		if err != nil {
+			return nil, err
 		}
+		filters = append(filters, f)
 	}
 	pods, err := runtime.Pods(filters...)
 	if err != nil {
diff --git a/pkg/domain/infra/abi/pods.go b/pkg/domain/infra/abi/pods.go
index 258640a81..11374e513 100644
--- a/pkg/domain/infra/abi/pods.go
+++ b/pkg/domain/infra/abi/pods.go
@@ -282,20 +282,17 @@ func (ic *ContainerEngine) PodTop(ctx context.Context, options entities.PodTopOp
 
 func (ic *ContainerEngine) PodPs(ctx context.Context, options entities.PodPSOptions) ([]*entities.ListPodsReport, error) {
 	var (
-		err     error
-		filters = []libpod.PodFilter{}
-		pds     = []*libpod.Pod{}
+		err error
+		pds = []*libpod.Pod{}
 	)
 
+	filters := make([]libpod.PodFilter, 0, len(options.Filters))
 	for k, v := range options.Filters {
-		for _, filter := range v {
-			f, err := lpfilters.GeneratePodFilterFunc(k, filter)
-			if err != nil {
-				return nil, err
-			}
-			filters = append(filters, f)
-
+		f, err := lpfilters.GeneratePodFilterFunc(k, v)
+		if err != nil {
+			return nil, err
 		}
+		filters = append(filters, f)
 	}
 	if options.Latest {
 		pod, err := ic.Libpod.GetLatestPod()