move prune filter parsing to common

there was some eerily similar code in c/common and in podman for
creating filter functions for various types. Move some of it here
and add support for the label!= filter in libimage and libnetwork that basically creates the inverse
function of label=

after this merges, will file a PR with the fix for containers within podman as well

there is already a label!= test in libimage/filters_test. Libimage somehow lets this syntax slide
even though it does not actually imact anything in podman

see containers/podman#14182

Signed-off-by: Charlie Doern <[email protected]>

libimage/filters.go

@@ -159,8 +159,9 @@ func (r *Runtime) compileImageFilters(ctx context.Context, options *ListImagesOp
 			filter = filterIntermediate(ctx, intermediate, t)
 
 		case "label":
-			filter = filterLabel(ctx, value)
-
+			filter = filterLabel(ctx, value, false)
+		case "label!":
+			filter = filterLabel(ctx, value, true)
 		case "readonly":
 			readOnly, err := r.bool(duplicate, key, value)
 			if err != nil {
@@ -309,13 +310,17 @@ func filterReferences(value string) filterFunc {
 }
 
 // filterLabel creates a label for matching the specified value.
-func filterLabel(ctx context.Context, value string) filterFunc {
+func filterLabel(ctx context.Context, value string, inverse bool) filterFunc {
 	return func(img *Image) (bool, error) {
 		labels, err := img.Labels(ctx)
 		if err != nil {
 			return false, err
 		}
-		return filtersPkg.MatchLabelFilters([]string{value}, labels), nil
+		val := filtersPkg.MatchLabelFilters([]string{value}, labels)
+		if inverse {
+			return !val, nil
+		}
+		return val, nil
 	}
 }
 

libnetwork/util/filters.go

@@ -65,7 +65,10 @@ func createPruneFilterFuncs(key string, filterValues []string) (types.FilterFunc
 		return func(net types.Network) bool {
 			return filters.MatchLabelFilters(filterValues, net.Labels)
 		}, nil
-
+	case "label!":
+		return func(net types.Network) bool {
+			return !filters.MatchLabelFilters(filterValues, net.Labels)
+		}, nil
 	case "until":
 		until, err := filters.ComputeUntilTimestamp(filterValues)
 		if err != nil {

pkg/filters/filters.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -112,11 +113,24 @@ outer:
 			filterValue = ""
 		}
 		for labelKey, labelValue := range labels {
-			if labelKey == filterKey && (filterValue == "" || labelValue == filterValue) {
-				continue outer
+			if filterValue == "" || labelValue == filterValue {
+				if labelKey == filterKey || matchPattern(filterKey, labelKey) {
+					continue outer
+				}
 			}
 		}
 		return false
 	}
 	return true
 }
+
+func matchPattern(pattern string, value string) bool {
+	if strings.Contains(pattern, "*") {
+		filter := fmt.Sprintf("*%s*", pattern)
+		filter = strings.ReplaceAll(filter, string(filepath.Separator), "|")
+		newName := strings.ReplaceAll(value, string(filepath.Separator), "|")
+		match, _ := filepath.Match(filter, newName)
+		return match
+	}
+	return false
+}