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87 lines
2.8 KiB
87 lines
2.8 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 updater
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import "github.com/coreos/clair/database"
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var fetchers = make(map[string]Fetcher)
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// Fetcher represents anything that can fetch vulnerabilities.
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type Fetcher interface {
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FetchUpdate(database.Datastore) (FetcherResponse, error)
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}
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// FetcherResponse represents the sum of results of an update.
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type FetcherResponse struct {
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FlagName string
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FlagValue string
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Notes []string
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Vulnerabilities []database.Vulnerability
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}
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// RegisterFetcher makes a Fetcher available by the provided name.
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// If Register is called twice with the same name or if driver is nil,
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// it panics.
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func RegisterFetcher(name string, f Fetcher) {
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if name == "" {
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panic("updater: could not register a Fetcher with an empty name")
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}
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if f == nil {
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panic("updater: could not register a nil Fetcher")
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}
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if _, dup := fetchers[name]; dup {
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panic("updater: RegisterFetcher called twice for " + name)
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}
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fetchers[name] = f
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}
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// DoVulnerabilityNamespacing is an helper function for fetchers.
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//
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// It takes a Vulnerability that doesn't have a Namespace and split it into
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// potentially multiple vulnerabilities that have a Namespace and only contains the FixedIn
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// FeatureVersions corresponding to their Namespace.
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//
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// It helps simplifying the fetchers that share the same metadata about a Vulnerability regardless
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// of their actual namespace (ie. same vulnerability information for every version of a distro).
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func DoVulnerabilityNamespacing(v database.Vulnerability) []database.Vulnerability {
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vulnerabilitiesMap := make(map[string]*database.Vulnerability)
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featureVersions := v.FixedIn
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v.FixedIn = []database.FeatureVersion{}
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for _, fv := range featureVersions {
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if vulnerability, ok := vulnerabilitiesMap[fv.Feature.Namespace.Name]; !ok {
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newVulnerability := v
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newVulnerability.Namespace.Name = fv.Feature.Namespace.Name
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newVulnerability.FixedIn = []database.FeatureVersion{fv}
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vulnerabilitiesMap[fv.Feature.Namespace.Name] = &newVulnerability
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} else {
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vulnerability.FixedIn = append(vulnerability.FixedIn, fv)
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}
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}
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// Convert map into a slice.
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var vulnerabilities []database.Vulnerability
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for _, vulnerability := range vulnerabilitiesMap {
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vulnerabilities = append(vulnerabilities, *vulnerability)
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}
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return vulnerabilities
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}
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