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94 lines
2.6 KiB
94 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 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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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", dpkg.ParserName, &lister{})
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}
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type lister struct{}
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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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pkgSet := make(map[string]database.Feature)
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ipkg := database.Feature{}
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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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continue
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}
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// Parse the package name or version.
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switch {
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case line[:2] == "P:":
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ipkg.Name = line[2:]
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case line[:2] == "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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} else {
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ipkg.Version = version
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}
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case line == "":
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// Restart if the parser reaches another package definition before
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// creating a valid package.
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ipkg = database.Feature{}
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}
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// If we have a whole feature, store it in the set and try to parse a new
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// one.
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if ipkg.Name != "" && ipkg.Version != "" {
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pkgSet[ipkg.Name+"#"+ipkg.Version] = ipkg
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ipkg = database.Feature{}
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}
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}
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// Convert the map into a slice and attach the version format
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pkgs := make([]database.Feature, 0, len(pkgSet))
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for _, pkg := range pkgSet {
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pkg.VersionFormat = dpkg.ParserName
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pkgs = append(pkgs, pkg)
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}
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return pkgs, 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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