Add support for CBL-Mariner distroless images (#1045)

test/integration/mariner_distroless_test.go

@@ -0,0 +1,22 @@
+package integration
+
+import (
+	"testing"
+
+	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/source"
+)
+
+func TestMarinerDistroless(t *testing.T) {
+	sbom, _ := catalogFixtureImage(t, "image-mariner-distroless", source.SquashedScope)
+
+	expectedPkgs := 12
+	actualPkgs := 0
+	for range sbom.Artifacts.PackageCatalog.Enumerate(pkg.RpmPkg) {
+		actualPkgs += 1
+	}
+
+	if actualPkgs != expectedPkgs {
+		t.Errorf("unexpected number of RPM packages: %d != %d", expectedPkgs, actualPkgs)
+	}
+}

test/integration/test-fixtures/image-mariner-distroless/Dockerfile

@@ -0,0 +1 @@
+FROM mcr.microsoft.com/cbl-mariner/distroless/base:2.0.202205275@sha256:f550c5428df17b145851ad75983aca6d613ad4b51ca7983b2a83e67d0ac91a5d