80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
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// 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 PackagesDetector interface defines a way to detect packages from input data
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type PackagesDetector interface {
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// Detect detects packages from the input data
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Detect(map[string][]byte) ([]*database.Package, 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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packagesDetectorsLock sync.Mutex
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packagesDetectors = make(map[string]PackagesDetector)
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)
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// RegisterPackagesDetector makes a PackagesDetector available for DetectPackages
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func RegisterPackagesDetector(name string, f PackagesDetector) {
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if name == "" {
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panic("Could not register a PackagesDetector 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 PackagesDetector")
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}
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packagesDetectorsLock.Lock()
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defer packagesDetectorsLock.Unlock()
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if _, alreadyExists := packagesDetectors[name]; alreadyExists {
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panic(fmt.Sprintf("Detector '%s' is already registered", name))
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}
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packagesDetectors[name] = f
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}
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// DetectPackages detects packages using every registered PackagesDetector
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func DetectPackages(data map[string][]byte) ([]*database.Package, error) {
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var packages []*database.Package
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for _, detector := range packagesDetectors {
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pkgs, err := detector.Detect(data)
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if err != nil {
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return []*database.Package{}, 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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// GetRequiredFilesPackages returns the list of files required for Detect for every
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// registered PackagesDetector, without leading /
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func GetRequiredFilesPackages() (files []string) {
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for _, detector := range packagesDetectors {
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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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