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88 lines
2.6 KiB
88 lines
2.6 KiB
// 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 redhatrelease implements a featurens.Detector for container image
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// layers containing an redhat-release-like files.
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//
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// This detector is typically useful for detecting CentOS and Red-Hat like
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// systems.
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package redhatrelease
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import (
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"regexp"
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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/rpm"
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"github.com/coreos/clair/pkg/tarutil"
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)
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var (
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oracleReleaseRegexp = regexp.MustCompile(`(?P<os>Oracle) (Linux Server release) (?P<version>[\d]+)`)
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centosReleaseRegexp = regexp.MustCompile(`(?P<os>[^\s]*) (Linux release|release) (?P<version>[\d]+)`)
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redhatReleaseRegexp = regexp.MustCompile(`(?P<os>Red Hat Enterprise Linux) (Client release|Server release|Workstation release) (?P<version>[\d]+)`)
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)
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type detector struct{}
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func init() {
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featurens.RegisterDetector("redhat-release", &detector{})
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}
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func (d detector) Detect(files tarutil.FilesMap) (*database.Namespace, error) {
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for _, filePath := range d.RequiredFilenames() {
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f, hasFile := files[filePath]
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if !hasFile {
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continue
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}
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var r []string
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// Attempt to match Oracle Linux.
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r = oracleReleaseRegexp.FindStringSubmatch(string(f))
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if len(r) == 4 {
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return &database.Namespace{
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Name: strings.ToLower(r[1]) + ":" + r[3],
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VersionFormat: rpm.ParserName,
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}, nil
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}
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// Attempt to match RHEL.
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r = redhatReleaseRegexp.FindStringSubmatch(string(f))
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if len(r) == 4 {
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// TODO(vbatts): this is a hack until https://github.com/coreos/clair/pull/193
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return &database.Namespace{
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Name: "centos" + ":" + r[3],
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VersionFormat: rpm.ParserName,
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}, nil
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}
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// Atempt to match CentOS.
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r = centosReleaseRegexp.FindStringSubmatch(string(f))
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if len(r) == 4 {
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return &database.Namespace{
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Name: strings.ToLower(r[1]) + ":" + r[3],
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VersionFormat: rpm.ParserName,
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}, nil
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}
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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/oracle-release", "etc/centos-release", "etc/redhat-release", "etc/system-release"}
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}
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