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parse-maven-lock.go
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parse-maven-lock.go
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package lockfile
import (
"encoding/xml"
"fmt"
"os"
"path/filepath"
"github.com/google/osv-scanner/internal/cachedregexp"
)
type MavenLockDependency struct {
XMLName xml.Name `xml:"dependency"`
GroupID string `xml:"groupId"`
ArtifactID string `xml:"artifactId"`
Version string `xml:"version"`
}
func (mld MavenLockDependency) parseResolvedVersion(version string) string {
versionRequirementReg := cachedregexp.MustCompile(`[[(]?(.*?)(?:,|[)\]]|$)`)
results := versionRequirementReg.FindStringSubmatch(version)
if results == nil || results[1] == "" {
return "0"
}
return results[1]
}
func (mld MavenLockDependency) resolveVersionValue(lockfile MavenLockFile) string {
interpolationReg := cachedregexp.MustCompile(`\${(.+)}`)
results := interpolationReg.FindStringSubmatch(mld.Version)
// no interpolation, so just return the version as-is
if results == nil {
return mld.Version
}
if val, ok := lockfile.Properties.m[results[1]]; ok {
return val
}
fmt.Fprintf(
os.Stderr,
"Failed to resolve version of %s: property \"%s\" could not be found for \"%s\"\n",
mld.GroupID+":"+mld.ArtifactID,
results[1],
lockfile.GroupID+":"+lockfile.ArtifactID,
)
return "0"
}
func (mld MavenLockDependency) ResolveVersion(lockfile MavenLockFile) string {
version := mld.resolveVersionValue(lockfile)
return mld.parseResolvedVersion(version)
}
type MavenLockFile struct {
XMLName xml.Name `xml:"project"`
ModelVersion string `xml:"modelVersion"`
GroupID string `xml:"groupId"`
ArtifactID string `xml:"artifactId"`
Properties MavenLockProperties `xml:"properties"`
Dependencies []MavenLockDependency `xml:"dependencies>dependency"`
ManagedDependencies []MavenLockDependency `xml:"dependencyManagement>dependencies>dependency"`
}
const MavenEcosystem Ecosystem = "Maven"
type MavenLockProperties struct {
m map[string]string
}
func (p *MavenLockProperties) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
p.m = map[string]string{}
for {
t, err := d.Token()
if err != nil {
return err
}
switch tt := t.(type) {
case xml.StartElement:
var s string
if err := d.DecodeElement(&s, &tt); err != nil {
return fmt.Errorf("%w", err)
}
p.m[tt.Name.Local] = s
case xml.EndElement:
if tt.Name == start.Name {
return nil
}
}
}
}
type MavenLockExtractor struct{}
func (e MavenLockExtractor) ShouldExtract(path string) bool {
return filepath.Base(path) == "pom.xml"
}
func (e MavenLockExtractor) Extract(f DepFile) ([]PackageDetails, error) {
var parsedLockfile *MavenLockFile
err := xml.NewDecoder(f).Decode(&parsedLockfile)
if err != nil {
return []PackageDetails{}, fmt.Errorf("could not extract from %s: %w", f.Path(), err)
}
details := map[string]PackageDetails{}
for _, lockPackage := range parsedLockfile.Dependencies {
finalName := lockPackage.GroupID + ":" + lockPackage.ArtifactID
details[finalName] = PackageDetails{
Name: finalName,
Version: lockPackage.ResolveVersion(*parsedLockfile),
Ecosystem: MavenEcosystem,
CompareAs: MavenEcosystem,
}
}
// managed dependencies take precedent over standard dependencies
for _, lockPackage := range parsedLockfile.ManagedDependencies {
finalName := lockPackage.GroupID + ":" + lockPackage.ArtifactID
details[finalName] = PackageDetails{
Name: finalName,
Version: lockPackage.ResolveVersion(*parsedLockfile),
Ecosystem: MavenEcosystem,
CompareAs: MavenEcosystem,
}
}
return pkgDetailsMapToSlice(details), nil
}
var _ Extractor = MavenLockExtractor{}
//nolint:gochecknoinits
func init() {
registerExtractor("pom.xml", MavenLockExtractor{})
}
func ParseMavenLock(pathToLockfile string) ([]PackageDetails, error) {
return extractFromFile(pathToLockfile, MavenLockExtractor{})
}