Updated the distro package to include SLES type to expand support, this change will not include the new sqlite3 rpmDB format

Signed-off-by: Toure Dunnon <toure.dunnon@anchore.com>

syft/distro/identify_test.go

@@ -75,6 +75,11 @@ func TestIdentifyDistro(t *testing.T) {
 			Type:    OpenSuseLeap,
 			Version: "15.2.0",
 		},
+		{
+			fixture: "test-fixtures/os/sles",
+			Type:    SLES,
+			Version: "15.2.0",
+		},
 		{
 			fixture: "test-fixtures/os/photon",
 			Type:    Photon,

syft/distro/test-fixtures/os/sles/etc/os-release

@@ -0,0 +1,9 @@
+NAME="SLES"
+VERSION="15-SP2"
+VERSION_ID="15.2"
+PRETTY_NAME="SUSE Linux Enterprise Server 15 SP2"
+ID="sles"
+ID_LIKE="suse"
+ANSI_COLOR="0;32"
+CPE_NAME="cpe:/o:suse:sles:15:sp2"
+DOCUMENTATION_URL="https://documentation.suse.com/"

syft/distro/type.go

@@ -17,6 +17,7 @@ const (
 	OracleLinux       Type = "oraclelinux"
 	ArchLinux         Type = "archlinux"
 	OpenSuseLeap      Type = "opensuseleap"
+	SLES              Type = "sles"
 	Photon            Type = "photon"
 	Windows           Type = "windows"
 )
@@ -34,6 +35,7 @@ var All = []Type{
 	OracleLinux,
 	ArchLinux,
 	OpenSuseLeap,
+	SLES,
 	Photon,
 	Windows,
 }
@@ -51,6 +53,7 @@ var IDMapping = map[string]Type{
 	"ol":            OracleLinux,
 	"arch":          ArchLinux,
 	"opensuse-leap": OpenSuseLeap,
+	"sles":          SLES,
 	"photon":        Photon,
 	"windows":       Windows,
 }