101 lines
2.6 KiB
Go
101 lines
2.6 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 apk implements a featurefmt.Lister for APK packages.
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package apk
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import (
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"bufio"
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"bytes"
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"github.com/deckarep/golang-set"
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log "github.com/sirupsen/logrus"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/ext/featurefmt"
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"github.com/coreos/clair/ext/versionfmt"
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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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func init() {
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featurefmt.RegisterLister("apk", "1.0", &lister{})
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}
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type lister struct{}
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func valid(pkg *featurefmt.PackageInfo) bool {
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return pkg.PackageName != "" && pkg.PackageVersion != ""
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}
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func addSourceVersion(pkg *featurefmt.PackageInfo) {
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if pkg.SourceName != "" {
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pkg.SourceVersion = pkg.PackageVersion
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}
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}
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func (l lister) ListFeatures(files tarutil.FilesMap) ([]database.Feature, error) {
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file, exists := files["lib/apk/db/installed"]
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if !exists {
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return []database.Feature{}, nil
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}
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// Iterate over each line in the "installed" file attempting to parse each
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// package into a feature that will be stored in a set to guarantee
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// uniqueness.
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packages := mapset.NewSet()
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pkg := featurefmt.PackageInfo{}
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scanner := bufio.NewScanner(bytes.NewBuffer(file))
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for scanner.Scan() {
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line := scanner.Text()
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if len(line) < 2 {
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if valid(&pkg) {
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addSourceVersion(&pkg)
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packages.Add(pkg)
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pkg.Reset()
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}
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continue
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}
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// Parse the package name or version.
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switch line[:2] {
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case "P:":
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pkg.PackageName = line[2:]
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case "V:":
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version := string(line[2:])
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err := versionfmt.Valid(dpkg.ParserName, version)
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if err != nil {
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log.WithError(err).WithField("version", version).Warning("could not parse package version. skipping")
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continue
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} else {
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pkg.PackageVersion = version
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}
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case "o:":
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pkg.SourceName = line[2:]
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}
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}
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// in case of no terminal line
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if valid(&pkg) {
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addSourceVersion(&pkg)
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packages.Add(pkg)
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}
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return featurefmt.PackageSetToFeatures(dpkg.ParserName, packages), nil
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}
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func (l lister) RequiredFilenames() []string {
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return []string{"lib/apk/db/installed"}
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}
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