refactor: unify Library and Package structs (#6633)

Signed-off-by: knqyf263 <knqyf263@gmail.com>
Co-authored-by: DmitriyLewen <91113035+DmitriyLewen@users.noreply.github.com>
Co-authored-by: DmitriyLewen <dmitriy.lewen@smartforce.io>

pkg/dependency/parser/python/packaging/parse.go

@@ -7,9 +7,10 @@ import (
 	"net/textproto"
 	"strings"
 
+	"github.com/samber/lo"
 	"golang.org/x/xerrors"
 
-	"github.com/aquasecurity/trivy/pkg/dependency/types"
+	ftypes "github.com/aquasecurity/trivy/pkg/fanal/types"
 	"github.com/aquasecurity/trivy/pkg/log"
 	xio "github.com/aquasecurity/trivy/pkg/x/io"
 )
@@ -18,7 +19,7 @@ type Parser struct {
 	logger *log.Logger
 }
 
-func NewParser() types.Parser {
+func NewParser() *Parser {
 	return &Parser{
 		logger: log.WithPrefix("python"),
 	}
@@ -26,7 +27,7 @@ func NewParser() types.Parser {
 
 // Parse parses egg and wheel metadata.
 // e.g. .egg-info/PKG-INFO and dist-info/METADATA
-func (p *Parser) Parse(r xio.ReadSeekerAt) ([]types.Library, []types.Dependency, error) {
+func (p *Parser) Parse(r xio.ReadSeekerAt) ([]ftypes.Package, []ftypes.Dependency, error) {
 	rd := textproto.NewReader(bufio.NewReader(r))
 	h, err := rd.ReadMIMEHeader()
 	if e := textproto.ProtocolError(""); errors.As(err, &e) {
@@ -82,11 +83,11 @@ func (p *Parser) Parse(r xio.ReadSeekerAt) ([]types.Library, []types.Dependency,
 		license = "file://" + h.Get("License-File")
 	}
 
-	return []types.Library{
+	return []ftypes.Package{
 		{
-			Name:    name,
-			Version: version,
-			License: license,
+			Name:     name,
+			Version:  version,
+			Licenses: lo.Ternary(license != "", []string{license}, nil),
 		},
 	}, nil, nil
 }