add python author and emil fields + add metadata type

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

syft/pkg/egg_wheel_metadata.go

@@ -0,0 +1,11 @@
+package pkg
+
+// EggWheelMetadata represents all captured data for a python egg or wheel package.
+type EggWheelMetadata struct {
+	Name        string `json:"name" mapstruct:"Name"`
+	Version     string `json:"version" mapstruct:"Version"`
+	License     string `json:"license" mapstruct:"License"`
+	Author      string `json:"author" mapstruct:"Author"`
+	AuthorEmail string `json:"authorEmail" mapstruct:"Author-email"`
+	Platform    string `json:"platform" mapstruct:"Platform"`
+}

syft/pkg/metadata.go

@@ -0,0 +1,14 @@
+package pkg
+
+type MetadataType string
+
+const (
+	UnknownMetadataType        MetadataType = "UnknownMetadata"
+	ApkMetadataType            MetadataType = "apk-metadata"
+	DpkgMetadataType           MetadataType = "dpkg-metadata"
+	GemMetadataType            MetadataType = "gem-metadata"
+	JavaMetadataType           MetadataType = "java-metadata"
+	NpmPackageJsonMetadataType MetadataType = "npm-package-json-metadata"
+	RpmdbMetadataType          MetadataType = "rpmdb-metadata"
+	PythonEggWheelMetadataType MetadataType = "python-egg-wheel-metadata"
+)

syft/pkg/npm_metadata.go

@@ -1,7 +1,7 @@
 package pkg
 
-// NpmMetadata holds extra information that is used in pkg.Package
-type NpmMetadata struct {
+// NpmPackageJsonMetadata holds extra information that is used in pkg.Package
+type NpmPackageJsonMetadata struct {
 	Name        string   `mapstructure:"name" json:"name"`
 	Version     string   `mapstructure:"version" json:"version"`
 	Files       []string `mapstructure:"files" json:"files"`

syft/pkg/package.go

@@ -23,10 +23,11 @@ type Package struct {
 	FoundBy string           `json:"foundBy"`  // the specific cataloger that discovered this package
 	Source  []file.Reference `json:"sources"`  // the locations that lead to the discovery of this package (note: this is not necessarily the locations that make up this package)
 	// TODO: should we move licenses into metadata?
-	Licenses []string    `json:"licenses"`           // licenses discovered with the package metadata
-	Language Language    `json:"language"`           // the language ecosystem this package belongs to (e.g. JavaScript, Python, etc)
-	Type     Type        `json:"type"`               // the package type (e.g. Npm, Yarn, Egg, Wheel, Rpm, Deb, etc)
-	Metadata interface{} `json:"metadata,omitempty"` // additional data found while parsing the package source
+	Licenses     []string     `json:"licenses"`           // licenses discovered with the package metadata
+	Language     Language     `json:"language"`           // the language ecosystem this package belongs to (e.g. JavaScript, Python, etc)
+	Type         Type         `json:"type"`               // the package type (e.g. Npm, Yarn, Python, Rpm, Deb, etc)
+	MetadataType MetadataType `json:"metadataType"`       // the shape of the additional data in the "metadata" field
+	Metadata     interface{}  `json:"metadata,omitempty"` // additional data found while parsing the package source
 }
 
 // ID returns the package ID, which is unique relative to a package catalog.

syft/pkg/package_test.go

@@ -93,7 +93,7 @@ func TestPackage_pURL(t *testing.T) {
 				Name:    "bad-name",
 				Version: "bad-v0.1.0",
 				Type:    RpmPkg,
-				Metadata: RpmMetadata{
+				Metadata: RpmdbMetadata{
 					Name:    "name",
 					Version: "v0.1.0",
 					Epoch:   2,

syft/pkg/rpmdb_metadata.go

@@ -7,8 +7,8 @@ import (
 	"github.com/package-url/packageurl-go"
 )
 
-// RpmMetadata represents all captured data for a RPM DB package entry.
-type RpmMetadata struct {
+// RpmdbMetadata represents all captured data for a RPM DB package entry.
+type RpmdbMetadata struct {
 	Name      string `json:"name"`
 	Version   string `json:"version"`
 	Epoch     int    `json:"epoch"`
@@ -20,7 +20,7 @@ type RpmMetadata struct {
 	Vendor    string `json:"vendor"`
 }
 
-func (m RpmMetadata) PackageURL(d distro.Distro) string {
+func (m RpmdbMetadata) PackageURL(d distro.Distro) string {
 	pURL := packageurl.NewPackageURL(
 		packageurl.TypeRPM,
 		d.Type.String(),

syft/pkg/rpmdb_metadata_test.go

@@ -1,22 +1,23 @@
 package pkg
 
 import (
+	"testing"
+
 	"github.com/anchore/syft/syft/distro"
 	"github.com/sergi/go-diff/diffmatchpatch"
-	"testing"
 )
 
 func TestRpmMetadata_pURL(t *testing.T) {
 	tests := []struct {
 		distro   distro.Distro
-		metadata RpmMetadata
+		metadata RpmdbMetadata
 		expected string
 	}{
 		{
 			distro: distro.Distro{
 				Type: distro.CentOS,
 			},
-			metadata: RpmMetadata{
+			metadata: RpmdbMetadata{
 				Name:    "p",
 				Version: "v",
 				Arch:    "a",
@@ -29,7 +30,7 @@ func TestRpmMetadata_pURL(t *testing.T) {
 			distro: distro.Distro{
 				Type: distro.RedHat,
 			},
-			metadata: RpmMetadata{
+			metadata: RpmdbMetadata{
 				Name:    "p",
 				Version: "v",
 				Arch:    "a",