Handle the 'enabled' property in bp2build

Also fix some bugs pertaining to configurable attribute handling of bool
attributes and label sttributes, so that they may support values across
multiple different axes at the same time.

Test: unit tests for bp2build
Test: mixed_droid

Change-Id: I411efcfddf02d55dbc0775962068a11348a8bb2c

android/module.go

@@ -869,6 +869,13 @@ type CommonAttributes struct {
 	Data bazel.LabelListAttribute
 }
 
+// constraintAttributes represents Bazel attributes pertaining to build constraints,
+// which make restrict building a Bazel target for some set of platforms.
+type constraintAttributes struct {
+	// Constraint values this target can be built for.
+	Target_compatible_with bazel.LabelListAttribute
+}
+
 type distProperties struct {
 	// configuration to distribute output files from this module to the distribution
 	// directory (default: $OUT/dist, configurable with $DIST_DIR)
@@ -1089,7 +1096,8 @@ func InitCommonOSAndroidMultiTargetsArchModule(m Module, hod HostOrDeviceSupport
 	m.base().commonProperties.CreateCommonOSVariant = true
 }
 
-func (attrs *CommonAttributes) fillCommonBp2BuildModuleAttrs(ctx *topDownMutatorContext) {
+func (attrs *CommonAttributes) fillCommonBp2BuildModuleAttrs(ctx *topDownMutatorContext,
+	enabledPropertyOverrides bazel.BoolAttribute) constraintAttributes {
 	// Assert passed-in attributes include Name
 	name := attrs.Name
 	if len(name) == 0 {
@@ -1107,14 +1115,45 @@ func (attrs *CommonAttributes) fillCommonBp2BuildModuleAttrs(ctx *topDownMutator
 
 	required := depsToLabelList(props.Required)
 	archVariantProps := mod.GetArchVariantProperties(ctx, &commonProperties{})
+
+	var enabledProperty bazel.BoolAttribute
+	if props.Enabled != nil {
+		enabledProperty.Value = props.Enabled
+	}
+
 	for axis, configToProps := range archVariantProps {
 		for config, _props := range configToProps {
 			if archProps, ok := _props.(*commonProperties); ok {
 				required.SetSelectValue(axis, config, depsToLabelList(archProps.Required).Value)
+				if archProps.Enabled != nil {
+					enabledProperty.SetSelectValue(axis, config, archProps.Enabled)
+				}
 			}
 		}
 	}
+
+	if enabledPropertyOverrides.Value != nil {
+		enabledProperty.Value = enabledPropertyOverrides.Value
+	}
+	for _, axis := range enabledPropertyOverrides.SortedConfigurationAxes() {
+		configToBools := enabledPropertyOverrides.ConfigurableValues[axis]
+		for cfg, val := range configToBools {
+			enabledProperty.SetSelectValue(axis, cfg, &val)
+		}
+	}
+
 	data.Append(required)
+
+	var err error
+	constraints := constraintAttributes{}
+	constraints.Target_compatible_with, err = enabledProperty.ToLabelListAttribute(
+		bazel.LabelList{[]bazel.Label{bazel.Label{Label: "@platforms//:incompatible"}}, nil},
+		bazel.LabelList{[]bazel.Label{}, nil})
+
+	if err != nil {
+		ctx.ModuleErrorf("Error processing enabled attribute: %s", err)
+	}
+	return constraints
 }
 
 // A ModuleBase object contains the properties that are common to all Android
@@ -1233,10 +1272,11 @@ type ModuleBase struct {
 
 // A struct containing all relevant information about a Bazel target converted via bp2build.
 type bp2buildInfo struct {
-	Dir         string
-	BazelProps  bazel.BazelTargetModuleProperties
-	CommonAttrs CommonAttributes
-	Attrs       interface{}
+	Dir             string
+	BazelProps      bazel.BazelTargetModuleProperties
+	CommonAttrs     CommonAttributes
+	ConstraintAttrs constraintAttributes
+	Attrs           interface{}
 }
 
 // TargetName returns the Bazel target name of a bp2build converted target.
@@ -1262,7 +1302,7 @@ func (b bp2buildInfo) BazelRuleLoadLocation() string {
 
 // BazelAttributes returns the Bazel attributes of a bp2build converted target.
 func (b bp2buildInfo) BazelAttributes() []interface{} {
-	return []interface{}{&b.CommonAttrs, b.Attrs}
+	return []interface{}{&b.CommonAttrs, &b.ConstraintAttrs, b.Attrs}
 }
 
 func (m *ModuleBase) addBp2buildInfo(info bp2buildInfo) {