Support dots in Kind name segment

SPEC.md

@@ -27,6 +27,7 @@ Released versions of the spec are available as Git tags.
 | v0.4.0 |   | Added `type` field to Mount specification |
 | v0.5.0 |   | Add `HostPath` to `DeviceNodes` |
 | v0.6.0 |   | Add `Annotations` field to `Spec` and `Device` specifications |
+|            |    | Allow dots (`.`)  in name segment of `Kind` field |
 
 *Note*: The initial release of a **spec** with version `v0.x.0` will be tagged as
 `v0.x.0` with subsequent changes to the API applicable to this version tagged as `v0.x.y`.

pkg/cdi/qualified-device.go

@@ -25,14 +25,10 @@ import (
 //
 //	"<vendor>/<class>=<name>".
 //
-// A valid vendor name may contain the following runes:
+// A valid vendor and class name may contain the following runes:
 //
 //	'A'-'Z', 'a'-'z', '0'-'9', '.', '-', '_'.
 //
-// A valid class name may contain the following runes:
-//
-//	'A'-'Z', 'a'-'z', '0'-'9', '-', '_'.
-//
 // A valid device name may containe the following runes:
 //
 //	'A'-'Z', 'a'-'z', '0'-'9', '-', '_', '.', ':'
@@ -98,7 +94,7 @@ func ValidateVendorName(vendor string) error {
 // A class name may contain the following ASCII characters:
 //   - upper- and lowercase letters ('A'-'Z', 'a'-'z')
 //   - digits ('0'-'9')
-//   - underscore and dash ('_', '-')
+//   - underscore, dash, and dot ('_', '-', and '.')
 //
 // Deprecated: use parser.ValidateClassName instead
 func ValidateClassName(class string) error {

pkg/cdi/qualified-device_test.go

@@ -54,6 +54,13 @@ func TestQualifiedName(t *testing.T) {
 			name:        "dev1",
 			isQualified: true,
 		},
+		{
+			device:      "vendor1.com/class.subclass=dev1",
+			vendor:      "vendor1.com",
+			class:       "class.subclass",
+			name:        "dev1",
+			isQualified: true,
+		},
 		{
 			device:      "other-vendor1.com/class_1=dev_1",
 			vendor:      "other-vendor1.com",

pkg/cdi/spec_test.go

@@ -662,6 +662,13 @@ func TestRequiredVersion(t *testing.T) {
 			},
 			expectedVersion: "0.6.0",
 		},
+		{
+			description: "dotted name (class) label require v0.6.0",
+			spec: &cdi.Spec{
+				Kind: "vendor.com/class.sub",
+			},
+			expectedVersion: "0.6.0",
+		},
 	}
 
 	for _, tc := range testCases {

pkg/cdi/version.go

@@ -132,6 +132,14 @@ func requiresV060(spec *cdi.Spec) bool {
 		}
 	}
 
+	// The v0.6.0 spec allows dots "." in Kind name label (class)
+	vendor, class := parser.ParseQualifier(spec.Kind)
+	if vendor != "" {
+		if strings.ContainsRune(class, '.') {
+			return true
+		}
+	}
+
 	return false
 }
 

pkg/parser/parser.go

@@ -26,14 +26,10 @@ import (
 //
 //	"<vendor>/<class>=<name>".
 //
-// A valid vendor name may contain the following runes:
+// A valid vendor and class name may contain the following runes:
 //
 //	'A'-'Z', 'a'-'z', '0'-'9', '.', '-', '_'.
 //
-// A valid class name may contain the following runes:
-//
-//	'A'-'Z', 'a'-'z', '0'-'9', '-', '_'.
-//
 // A valid device name may containe the following runes:
 //
 //	'A'-'Z', 'a'-'z', '0'-'9', '-', '_', '.', ':'
@@ -122,52 +118,51 @@ func ParseQualifier(kind string) (string, string) {
 //   - digits ('0'-'9')
 //   - underscore, dash, and dot ('_', '-', and '.')
 func ValidateVendorName(vendor string) error {
-	if vendor == "" {
-		return fmt.Errorf("invalid (empty) vendor name")
-	}
-	if !IsLetter(rune(vendor[0])) {
-		return fmt.Errorf("invalid vendor %q, should start with letter", vendor)
-	}
-	for _, c := range string(vendor[1 : len(vendor)-1]) {
-		switch {
-		case IsAlphaNumeric(c):
-		case c == '_' || c == '-' || c == '.':
-		default:
-			return fmt.Errorf("invalid character '%c' in vendor name %q",
-				c, vendor)
-		}
-	}
-	if !IsAlphaNumeric(rune(vendor[len(vendor)-1])) {
-		return fmt.Errorf("invalid vendor %q, should end with a letter or digit", vendor)
+	err := validateVendorOrClassName(vendor)
+	if err != nil {
+		err = fmt.Errorf("invalid vendor. %w", err)
 	}
-
-	return nil
+	return err
 }
 
 // ValidateClassName checks the validity of class name.
 // A class name may contain the following ASCII characters:
 //   - upper- and lowercase letters ('A'-'Z', 'a'-'z')
 //   - digits ('0'-'9')
-//   - underscore and dash ('_', '-')
+//   - underscore, dash, and dot ('_', '-', and '.')
 func ValidateClassName(class string) error {
-	if class == "" {
-		return fmt.Errorf("invalid (empty) device class")
+	err := validateVendorOrClassName(class)
+	if err != nil {
+		err = fmt.Errorf("invalid class. %w", err)
 	}
-	if !IsLetter(rune(class[0])) {
-		return fmt.Errorf("invalid class %q, should start with letter", class)
+	return err
+}
+
+// validateVendorOrClassName checks the validity of vendor or class name.
+// A name may contain the following ASCII characters:
+//   - upper- and lowercase letters ('A'-'Z', 'a'-'z')
+//   - digits ('0'-'9')
+//   - underscore, dash, and dot ('_', '-', and '.')
+func validateVendorOrClassName(name string) error {
+	if name == "" {
+		return fmt.Errorf("empty name")
 	}
-	for _, c := range string(class[1 : len(class)-1]) {
+	if !IsLetter(rune(name[0])) {
+		return fmt.Errorf("%q, should start with letter", name)
+	}
+	for _, c := range string(name[1 : len(name)-1]) {
 		switch {
 		case IsAlphaNumeric(c):
-		case c == '_' || c == '-':
+		case c == '_' || c == '-' || c == '.':
 		default:
-			return fmt.Errorf("invalid character '%c' in device class %q",
-				c, class)
+			return fmt.Errorf("invalid character '%c' in name %q",
+				c, name)
 		}
 	}
-	if !IsAlphaNumeric(rune(class[len(class)-1])) {
-		return fmt.Errorf("invalid class %q, should end with a letter or digit", class)
+	if !IsAlphaNumeric(rune(name[len(name)-1])) {
+		return fmt.Errorf("%q, should end with a letter or digit", name)
 	}
+
 	return nil
 }
 

pkg/parser/parser_test.go

@@ -54,6 +54,13 @@ func TestQualifiedName(t *testing.T) {
 			name:        "dev1",
 			isQualified: true,
 		},
+		{
+			device:      "vendor1.com/class.subclass=dev1",
+			vendor:      "vendor1.com",
+			class:       "class.subclass",
+			name:        "dev1",
+			isQualified: true,
+		},
 		{
 			device:      "other-vendor1.com/class_1=dev_1",
 			vendor:      "other-vendor1.com",