clair/worker/detectors/namespace/lsbrelease/lsbrelease.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 lsbrelease
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import (
"bufio"
"regexp"
"strings"
"github.com/coreos/clair/database"
"github.com/coreos/clair/ext/versionfmt/dpkg"
"github.com/coreos/clair/ext/versionfmt/rpm"
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"github.com/coreos/clair/worker/detectors"
)
var (
lsbReleaseOSRegexp = regexp.MustCompile(`^DISTRIB_ID=(.*)`)
lsbReleaseVersionRegexp = regexp.MustCompile(`^DISTRIB_RELEASE=(.*)`)
)
// LsbReleaseNamespaceDetector implements NamespaceDetector and detects the
// Namespace from the /etc/lsb-release file.
//
// This detector is necessary for Ubuntu Precise.
type LsbReleaseNamespaceDetector struct{}
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func init() {
detectors.RegisterNamespaceDetector("lsb-release", &LsbReleaseNamespaceDetector{})
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}
func (detector *LsbReleaseNamespaceDetector) Detect(data map[string][]byte) *database.Namespace {
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f, hasFile := data["etc/lsb-release"]
if !hasFile {
return nil
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}
var OS, version string
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scanner := bufio.NewScanner(strings.NewReader(string(f)))
for scanner.Scan() {
line := scanner.Text()
r := lsbReleaseOSRegexp.FindStringSubmatch(line)
if len(r) == 2 {
OS = strings.Replace(strings.ToLower(r[1]), "\"", "", -1)
}
r = lsbReleaseVersionRegexp.FindStringSubmatch(line)
if len(r) == 2 {
version = strings.Replace(strings.ToLower(r[1]), "\"", "", -1)
// We care about the .04 for Ubuntu but not for Debian / CentOS
if OS == "centos" || OS == "debian" {
i := strings.Index(version, ".")
if i >= 0 {
version = version[:i]
}
}
}
}
// Determine the VersionFormat.
var versionFormat string
switch OS {
case "debian", "ubuntu":
versionFormat = dpkg.ParserName
case "centos", "rhel", "fedora", "amzn", "ol", "oracle":
versionFormat = rpm.ParserName
default:
return nil
}
if OS != "" && version != "" {
return &database.Namespace{
Name: OS + ":" + version,
VersionFormat: versionFormat,
}
}
return nil
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}
// GetRequiredFiles returns the list of files that are required for Detect()
func (detector *LsbReleaseNamespaceDetector) GetRequiredFiles() []string {
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return []string{"etc/lsb-release"}
}