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tag_filter.go
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tag_filter.go
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// Copyright Project Harbor Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package source
import (
"strings"
"github.com/goharbor/harbor/src/common/utils/log"
"github.com/goharbor/harbor/src/replication"
"github.com/goharbor/harbor/src/replication/models"
"github.com/goharbor/harbor/src/replication/registry"
)
// TagFilter implements Filter interface to filter tag
type TagFilter struct {
pattern string
converter Converter
}
// NewTagFilter returns an instance of TagFilter
func NewTagFilter(pattern string, registry registry.Adaptor) *TagFilter {
return &TagFilter{
pattern: pattern,
converter: NewTagConverter(registry),
}
}
// Init ...
func (t *TagFilter) Init() error {
return nil
}
// GetConverter ...
func (t *TagFilter) GetConverter() Converter {
return t.converter
}
// DoFilter filters tag of the image
func (t *TagFilter) DoFilter(items []models.FilterItem) []models.FilterItem {
candidates := []string{}
for _, item := range items {
candidates = append(candidates, item.Value)
}
log.Debugf("tag filter candidates: %v", candidates)
result := []models.FilterItem{}
for _, item := range items {
if item.Kind != replication.FilterItemKindTag {
log.Warningf("unsupported type %s for tag filter, dropped", item.Kind)
continue
}
if len(t.pattern) == 0 {
log.Debugf("pattern is null, add %s to the tag filter result list", item.Value)
result = append(result, item)
continue
}
tag := strings.SplitN(item.Value, ":", 2)[1]
matched, err := match(t.pattern, tag)
if err != nil {
log.Errorf("failed to match pattern %s to value %s: %v, skip it", t.pattern, tag, err)
continue
}
if matched {
log.Debugf("pattern %s matched, add %s to the tag filter result list", t.pattern, item.Value)
result = append(result, item)
}
}
return result
}