feat: report unknowns in sbom (#2998)

Signed-off-by: Keith Zantow <kzantow@gmail.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/pkg/cataloger/swift/parse_package_resolved.go

@@ -8,6 +8,7 @@ import (
 	"io"
 
 	"github.com/anchore/syft/internal/log"
+	"github.com/anchore/syft/internal/unknown"
 	"github.com/anchore/syft/syft/artifact"
 	"github.com/anchore/syft/syft/file"
 	"github.com/anchore/syft/syft/pkg"
@@ -71,7 +72,7 @@ func parsePackageResolved(_ context.Context, _ file.Resolver, _ *generic.Environ
 
 	if packageResolvedData["version"] == nil {
 		log.Trace("no version found in Package.resolved file, skipping")
-		return nil, nil, nil
+		return nil, nil, fmt.Errorf("no version found in Package.resolved file")
 	}
 
 	version, ok := packageResolvedData["version"].(float64)
@@ -97,7 +98,7 @@ func parsePackageResolved(_ context.Context, _ file.Resolver, _ *generic.Environ
 			),
 		)
 	}
-	return pkgs, nil, nil
+	return pkgs, nil, unknown.IfEmptyf(pkgs, "unable to determine packages")
 }
 
 func pinsForVersion(data map[string]interface{}, version float64) ([]packagePin, error) {

syft/pkg/cataloger/swift/parse_package_resolved_test.go

@@ -134,3 +134,10 @@ func TestParsePackageResolved_versionNotANumber(t *testing.T) {
 
 	pkgtest.NewCatalogTester().FromFile(t, fixture).WithError().TestParser(t, parsePackageResolved)
 }
+
+func Test_corruptPackageResolved(t *testing.T) {
+	pkgtest.NewCatalogTester().
+		FromFile(t, "test-fixtures/bad-version-packages.resolved").
+		WithError().
+		TestParser(t, parsePackageResolved)
+}

syft/pkg/cataloger/swift/parse_podfile_lock.go

@@ -8,6 +8,7 @@ import (
 
 	"gopkg.in/yaml.v3"
 
+	"github.com/anchore/syft/internal/unknown"
 	"github.com/anchore/syft/syft/artifact"
 	"github.com/anchore/syft/syft/file"
 	"github.com/anchore/syft/syft/pkg"
@@ -71,5 +72,5 @@ func parsePodfileLock(_ context.Context, _ file.Resolver, _ *generic.Environment
 		)
 	}
 
-	return pkgs, nil, nil
+	return pkgs, nil, unknown.IfEmptyf(pkgs, "unable to determine packages")
 }

syft/pkg/cataloger/swift/parse_podfile_lock_test.go

@@ -273,3 +273,10 @@ func TestParsePodfileLock(t *testing.T) {
 
 	pkgtest.TestFileParser(t, fixture, parsePodfileLock, expectedPkgs, expectedRelationships)
 }
+
+func Test_corruptPodfile(t *testing.T) {
+	pkgtest.NewCatalogTester().
+		FromFile(t, "test-fixtures/glob-paths/src/Podfile.lock").
+		WithError().
+		TestParser(t, parsePodfileLock)
+}