Add new distro and mapping to support Rocky Linux distro identification (#624)

Signed-off-by: Swathi Gangisetty <swathi@anchore.com>

syft/distro/identify_test.go

@@ -123,6 +123,11 @@ func TestIdentifyDistro(t *testing.T) {
 			Type:    Mariner,
 			Version: "1.0.0",
 		},
+		{
+			fixture: "test-fixtures/os/rockylinux",
+			Type:    RockyLinux,
+			Version: "8.4.0",
+		},
 	}
 
 	observedDistros := internal.NewStringSet()

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

@@ -0,0 +1,13 @@
+NAME="Rocky Linux"
+VERSION="8.4 (Green Obsidian)"
+ID="rocky"
+ID_LIKE="rhel fedora"
+VERSION_ID="8.4"
+PLATFORM_ID="platform:el8"
+PRETTY_NAME="Rocky Linux 8.4 (Green Obsidian)"
+ANSI_COLOR="0;32"
+CPE_NAME="cpe:/o:rocky:rocky:8.4:GA"
+HOME_URL="https://rockylinux.org/"
+BUG_REPORT_URL="https://bugs.rockylinux.org/"
+ROCKY_SUPPORT_PRODUCT="Rocky Linux"
+ROCKY_SUPPORT_PRODUCT_VERSION="8"

syft/distro/type.go

@@ -21,6 +21,7 @@ const (
 	Photon            Type = "photon"
 	Windows           Type = "windows"
 	Mariner           Type = "mariner"
+	RockyLinux        Type = "rockylinux"
 )
 
 // All contains all Linux distribution options
@@ -40,6 +41,7 @@ var All = []Type{
 	Photon,
 	Windows,
 	Mariner,
+	RockyLinux,
 }
 
 // IDMapping connects a distro ID like "ubuntu" to a Distro type
@@ -59,6 +61,7 @@ var IDMapping = map[string]Type{
 	"photon":        Photon,
 	"windows":       Windows,
 	"mariner":       Mariner,
+	"rocky":         RockyLinux,
 }
 
 // String returns the string representation of the given Linux distribution.