91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Copyright 2017 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 aptsources implements a featurens.Detector for apt based container
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// image layers.
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//
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// This detector is necessary to determine the precise Debian version when it
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// is an unstable version for instance.
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package aptsources
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import (
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"bufio"
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"strings"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/ext/featurens"
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"github.com/coreos/clair/ext/versionfmt/dpkg"
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"github.com/coreos/clair/pkg/tarutil"
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)
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type detector struct{}
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func init() {
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featurens.RegisterDetector("apt-sources", &detector{})
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}
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func (d detector) Detect(files tarutil.FilesMap) (*database.Namespace, error) {
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f, hasFile := files["etc/apt/sources.list"]
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if !hasFile {
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return nil, nil
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}
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var OS, version string
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scanner := bufio.NewScanner(strings.NewReader(string(f)))
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for scanner.Scan() {
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// Format: man sources.list | https://wiki.debian.org/SourcesList)
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// deb uri distribution component1 component2 component3
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// deb-src uri distribution component1 component2 component3
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line := strings.Split(scanner.Text(), " ")
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if len(line) > 3 {
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// Only consider main component
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isMainComponent := false
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for _, component := range line[3:] {
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if component == "main" {
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isMainComponent = true
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break
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}
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}
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if !isMainComponent {
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continue
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}
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var found bool
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version, found = database.DebianReleasesMapping[line[2]]
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if found {
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OS = "debian"
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break
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}
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version, found = database.UbuntuReleasesMapping[line[2]]
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if found {
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OS = "ubuntu"
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break
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}
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}
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}
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if OS != "" && version != "" {
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return &database.Namespace{
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Name: OS + ":" + version,
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VersionFormat: dpkg.ParserName,
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}, nil
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}
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return nil, nil
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}
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func (d detector) RequiredFilenames() []string {
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return []string{"etc/apt/sources.list"}
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}
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