124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
// 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 nodejs
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import (
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"bufio"
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"io/ioutil"
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"os"
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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/utils"
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"github.com/coreos/clair/worker/detectors"
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"github.com/coreos/pkg/capnslog"
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)
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var (
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log = capnslog.NewPackageLogger("github.com/coreos/clair", "worker/detectors/packages")
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defaultNodejsVersion = "all"
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nodejsPkg = "nodejs"
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nodejsNSRegexp = regexp.MustCompile(`bin/(node|nodejs|npm)$`)
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nodejsNSRpmRegexp = regexp.MustCompile(`^var/lib/rpm/Packages$`)
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nodejsNSDpkgRegexp = regexp.MustCompile(`^var/lib/dpkg/status$`)
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)
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// NodejsNamespaceDetector implements NamespaceDetector and detects Nodejs
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// from /var/lib/dpkg/status, /var/lib/rpm/Packages or node binary installed manually
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type NodejsNamespaceDetector struct{}
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func init() {
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detectors.RegisterNamespaceDetector("nodejs", &NodejsNamespaceDetector{})
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}
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func (detector *NodejsNamespaceDetector) Detect(data map[string][]byte) *database.Namespace {
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if ns := detectDpkgNodejs(data); ns != nil {
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return ns
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} else if ns := detectRpmNodejs(data); ns != nil {
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return ns
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} else if ns := detectNodejs(data); ns != nil {
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return ns
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}
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return nil
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}
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func detectNodejs(data map[string][]byte) *database.Namespace {
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for filename, _ := range data {
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if nodejsNSRegexp.MatchString(filename) {
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return &database.Namespace{Name: nodejsPkg + ":" + defaultNodejsVersion}
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}
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}
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return nil
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}
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func detectDpkgNodejs(data map[string][]byte) *database.Namespace {
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f, hasFile := data["var/lib/dpkg/status"]
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if !hasFile {
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return nil
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}
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scanner := bufio.NewScanner(strings.NewReader(string(f)))
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for scanner.Scan() {
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line := scanner.Text()
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if strings.HasPrefix(line, "Package: ") {
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if pkgName := strings.TrimSpace(strings.TrimPrefix(line, "Package: ")); pkgName == nodejsPkg {
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return &database.Namespace{Name: nodejsPkg + ":" + defaultNodejsVersion}
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}
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}
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}
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return nil
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}
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func detectRpmNodejs(data map[string][]byte) *database.Namespace {
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f, hasFile := data["var/lib/rpm/Packages"]
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if !hasFile {
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return nil
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}
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// Write the required "Packages" file to disk
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tmpDir, err := ioutil.TempDir(os.TempDir(), "rpm")
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defer os.RemoveAll(tmpDir)
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if err != nil {
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log.Errorf("could not create temporary folder for RPM %s detection: %s", nodejsPkg, err)
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return nil
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}
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err = ioutil.WriteFile(tmpDir+"/Packages", f, 0700)
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if err != nil {
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log.Errorf("could not create temporary file for RPM %s detection: %s", nodejsPkg, err)
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return nil
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}
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out, err := utils.Exec(tmpDir, "rpm", "--dbpath", tmpDir, "-qi", nodejsPkg)
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if err != nil {
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log.Errorf("could not query RPM %s: %s. output: %s", nodejsPkg, err, string(out))
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return nil
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}
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return &database.Namespace{Name: nodejsPkg + ":" + defaultNodejsVersion}
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}
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// GetRequiredFiles returns the list of files that are required for Detect()
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func (detector *NodejsNamespaceDetector) GetRequiredFiles() []*regexp.Regexp {
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return []*regexp.Regexp{nodejsNSRegexp, nodejsNSRpmRegexp, nodejsNSDpkgRegexp}
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}
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