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91 lines
2.5 KiB
91 lines
2.5 KiB
// Copyright 2016 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
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import (
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"bufio"
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"bytes"
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"github.com/coreos/pkg/capnslog"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/ext/versionfmt"
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"github.com/coreos/clair/worker/detectors"
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// dpkg versioning is used to parse apk packages.
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_ "github.com/coreos/clair/ext/versionfmt/dpkg"
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)
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var log = capnslog.NewPackageLogger("github.com/coreos/clair", "worker/detectors/packages")
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func init() {
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detectors.RegisterFeaturesDetector("apk", &detector{})
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}
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type detector struct{}
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func (d *detector) Detect(data map[string][]byte) ([]database.FeatureVersion, error) {
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file, exists := data["lib/apk/db/installed"]
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if !exists {
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return []database.FeatureVersion{}, 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.FeatureVersion)
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ipkg := database.FeatureVersion{}
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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.Feature.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", version)
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if err != nil {
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log.Warningf("could not parse package version '%s': %s. skipping", version, err.Error())
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} else {
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ipkg.Version = version
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}
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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.Feature.Name != "" && ipkg.Version != "" {
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pkgSet[ipkg.Feature.Name+"#"+ipkg.Version] = ipkg
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ipkg = database.FeatureVersion{}
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}
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}
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// Convert the map into a slice.
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pkgs := make([]database.FeatureVersion, 0, len(pkgSet))
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for _, pkg := range pkgSet {
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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 (d *detector) GetRequiredFiles() []string {
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return []string{"lib/apk/db/installed"}
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}
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