add Arch for amazon linux scan (fanal#21)

Author: tomoyamachi

analyzer/analyzer.go

@@ -58,17 +58,13 @@ type Package struct {
 	Version    string
 	Release    string
 	Epoch      int
+	Arch       string
 	SrcName    string
 	SrcVersion string
 	SrcRelease string
 	SrcEpoch   int
 }
 
-var (
-	TypeBinary = "binary"
-	TypeSource = "source"
-)
-
 type SrcPackage struct {
 	Name        string   `json:"name"`
 	Version     string   `json:"version"`
@@ -161,7 +157,7 @@ func GetPackages(filesMap extractor.FileMap) ([]Package, error) {
 		}
 		return pkgs, nil
 	}
-	return nil, ErrUnknownOS
+	return nil, ErrPkgAnalysis
 }
 
 func GetPackagesFromCommands(targetOS OS, filesMap extractor.FileMap) ([]Package, error) {

analyzer/pkg/rpm/rpm.go

@@ -62,11 +62,16 @@ func (a rpmPkgAnalyzer) parsePkgInfo(packageBytes []byte) (pkgs []analyzer.Packa
 	}
 
 	for _, pkg := range pkgList {
+		arch := pkg.Arch
+		if arch == "" {
+			arch = "(none)"
+		}
 		p := analyzer.Package{
 			Name:    pkg.Name,
 			Epoch:   pkg.Epoch,
 			Version: pkg.Version,
 			Release: pkg.Release,
+			Arch:    arch,
 		}
 		pkgs = append(pkgs, p)
 	}