[cmd/mdatagen]: Add feature gates support to metadata-schema.yaml

cmd/mdatagen/internal/loader.go

@@ -40,6 +40,16 @@ func (mn AttributeName) RenderUnexported() (string, error) {
 	return FormatIdentifier(string(mn), false)
 }
 
+type featureGateName string
+
+func (mn featureGateName) Render() (string, error) {
+	return formatIdentifier(string(mn), true)
+}
+
+func (mn featureGateName) RenderUnexported() (string, error) {
+	return formatIdentifier(string(mn), false)
+}
+
 // ValueType defines an attribute value type.
 type ValueType struct {
 	// ValueType is type of the attribute value.
@@ -296,6 +306,8 @@ type Metadata struct {
 	ShortFolderName string `mapstructure:"-"`
 	// Tests is the set of tests generated with the component
 	Tests tests `mapstructure:"tests"`
+	// FeatureGates that can be used for the component.
+	FeatureGates map[featureGateName]featureGate `mapstructure:"feature_gates"`
 }
 
 func setAttributesFullName(attrs map[AttributeName]Attribute) {
@@ -373,3 +385,25 @@ func packageName() (string, error) {
 	}
 	return strings.TrimSpace(string(output)), nil
 }
+
+type featureGate struct {
+	// Optional.
+	Id string `mapstructure:"id"`
+	// Description describes the purpose of the attribute.
+	Description string `mapstructure:"description"`
+	// Stage current stage at which the feature gate is in the development lifecyle
+	Stage string `mapstructure:"stage"`
+	// ReferenceURL can optionally give the url of the feature_gate
+	ReferenceURL string `mapstructure:"referenceURL"`
+	// FromVersion optional field which gives the release version from which the gate has been given the current stage
+	FromVersion string `mapstructure:"fromVersion"`
+	// ToVersion optional field which gives the release version till which the gate the gate had the given lifecycle stage
+	ToVersion string `mapstructure:"toVersion"`
+	// FeatureGateName name of the feature gate
+	FeatureGateName featureGateName `mapstructure:"-"`
+}
+
+// Name returns the name of the feature gate
+func (fg featureGate) Name() featureGateName {
+	return fg.FeatureGateName
+}

cmd/mdatagen/metadata-schema.yaml

@@ -175,3 +175,20 @@ telemetry:
       # Optional: array of attributes that were defined in the attributes section that are emitted by this metric.
       # Note: Only the following attribute types are supported: <string|int|double|bool>
       attributes: [string]
+
+#Optional: Gate is an immutable object that is owned by the Registry and represents an individual feature that
+# may be enabled or disabled based on the lifecycle state of the feature and CLI flags specified by the user.
+feature_gates:
+  <feature_gate.name>:
+    #Optional: id of the feature gate
+    id:
+    #Required: description of the gate
+    description:
+    #Required: current stage at which the feature gate is in the development lifecyle
+    stage:
+    #Optional: link to the issue where the gate has been discussed
+    referenceURL:
+    #Optional: the release version from which the gate has been given the current stage
+    fromVersion:
+    #Optional: the release version till which the gate had the given lifecycle stage
+    toVersion: