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aptsources.go
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aptsources.go
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// Copyright 2015 clair 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 aptsources
import (
"bufio"
"strings"
"github.com/coreos/clair/database"
"github.com/coreos/clair/worker/detectors"
)
// AptSourcesNamespaceDetector implements NamespaceDetector and detects the Namespace from the
// /etc/apt/sources.list file.
//
// This detector is necessary to determine precise Debian version when it is
// an unstable version for instance.
type AptSourcesNamespaceDetector struct{}
func init() {
detectors.RegisterNamespaceDetector("apt-sources", &AptSourcesNamespaceDetector{})
}
func (detector *AptSourcesNamespaceDetector) Detect(data map[string][]byte) *database.Namespace {
f, hasFile := data["etc/apt/sources.list"]
if !hasFile {
return nil
}
var OS, version string
scanner := bufio.NewScanner(strings.NewReader(string(f)))
for scanner.Scan() {
// Format: man sources.list | https://wiki.debian.org/SourcesList)
// deb uri distribution component1 component2 component3
// deb-src uri distribution component1 component2 component3
line := strings.Split(scanner.Text(), " ")
if len(line) > 3 {
// Only consider main component
isMainComponent := false
for _, component := range line[3:] {
if component == "main" {
isMainComponent = true
break
}
}
if !isMainComponent {
continue
}
var found bool
version, found = database.DebianReleasesMapping[line[2]]
if found {
OS = "debian"
break
}
version, found = database.UbuntuReleasesMapping[line[2]]
if found {
OS = "ubuntu"
break
}
}
}
if OS != "" && version != "" {
return &database.Namespace{Name: OS + ":" + version}
}
return nil
}
func (detector *AptSourcesNamespaceDetector) GetRequiredFiles() []string {
return []string{"etc/apt/sources.list"}
}