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80 lines
2.4 KiB
80 lines
2.4 KiB
// Copyright 2015 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package detectors
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import (
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"fmt"
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"sync"
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"github.com/coreos/clair/database"
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)
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// The FeaturesDetector interface defines a way to detect packages from input data.
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type FeaturesDetector interface {
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// Detect detects a list of FeatureVersion from the input data.
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Detect(map[string][]byte) ([]database.FeatureVersion, error)
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// GetRequiredFiles returns the list of files required for Detect, without
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// leading /.
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GetRequiredFiles() []string
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}
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var (
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featuresDetectorsLock sync.Mutex
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featuresDetectors = make(map[string]FeaturesDetector)
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)
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// RegisterFeaturesDetector makes a FeaturesDetector available for DetectFeatures.
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func RegisterFeaturesDetector(name string, f FeaturesDetector) {
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if name == "" {
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panic("Could not register a FeaturesDetector with an empty name")
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}
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if f == nil {
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panic("Could not register a nil FeaturesDetector")
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}
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featuresDetectorsLock.Lock()
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defer featuresDetectorsLock.Unlock()
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if _, alreadyExists := featuresDetectors[name]; alreadyExists {
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panic(fmt.Sprintf("Detector '%s' is already registered", name))
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}
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featuresDetectors[name] = f
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}
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// DetectFeatures detects a list of FeatureVersion using every registered FeaturesDetector.
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func DetectFeatures(data map[string][]byte) ([]database.FeatureVersion, error) {
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var packages []database.FeatureVersion
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for _, detector := range featuresDetectors {
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pkgs, err := detector.Detect(data)
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if err != nil {
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return []database.FeatureVersion{}, err
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}
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packages = append(packages, pkgs...)
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}
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return packages, nil
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}
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// GetRequiredFilesFeatures returns the list of files required for Detect for every
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// registered FeaturesDetector, without leading /.
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func GetRequiredFilesFeatures() (files []string) {
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for _, detector := range featuresDetectors {
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files = append(files, detector.GetRequiredFiles()...)
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}
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return
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}
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