Create build settings for all product config variables

Bug: 269577299
Test: Presubmits
Change-Id: Id8b7d65d657fa20ad8591e58d5173445b0e4f4df
diff --git a/bp2build/Android.bp b/bp2build/Android.bp
index f889693..4a3786f 100644
--- a/bp2build/Android.bp
+++ b/bp2build/Android.bp
@@ -46,6 +46,7 @@
         "apex_conversion_test.go",
         "apex_key_conversion_test.go",
         "build_conversion_test.go",
+        "bp2build_product_config_test.go",
         "bzl_conversion_test.go",
         "cc_binary_conversion_test.go",
         "cc_library_conversion_test.go",
diff --git a/bp2build/bp2build_product_config.go b/bp2build/bp2build_product_config.go
index c8067af..f56e6d8 100644
--- a/bp2build/bp2build_product_config.go
+++ b/bp2build/bp2build_product_config.go
@@ -7,6 +7,7 @@
 	"fmt"
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 
 	"github.com/google/blueprint/proptools"
@@ -151,16 +152,17 @@
 	if err != nil {
 		return "", err
 	}
-	result := "platforms:\n"
-	result += platformMappingSingleProduct(mainProductLabel, mainProductVariables)
+	var result strings.Builder
+	result.WriteString("platforms:\n")
+	platformMappingSingleProduct(mainProductLabel, mainProductVariables, &result)
 	for product, productVariablesStarlark := range productsForTesting {
 		productVariables, err := starlarkMapToProductVariables(productVariablesStarlark)
 		if err != nil {
 			return "", err
 		}
-		result += platformMappingSingleProduct("@//build/bazel/tests/products:"+product, &productVariables)
+		platformMappingSingleProduct("@//build/bazel/tests/products:"+product, &productVariables, &result)
 	}
-	return result, nil
+	return result.String(), nil
 }
 
 var bazelPlatformSuffixes = []string{
@@ -177,42 +179,107 @@
 	"_windows_x86_64",
 }
 
-func platformMappingSingleProduct(label string, productVariables *android.ProductVariables) string {
-	buildSettings := ""
-	buildSettings += fmt.Sprintf("    --//build/bazel/product_config:apex_global_min_sdk_version_override=%s\n", proptools.String(productVariables.ApexGlobalMinSdkVersionOverride))
-	buildSettings += fmt.Sprintf("    --//build/bazel/product_config:cfi_include_paths=%s\n", strings.Join(productVariables.CFIIncludePaths, ","))
-	buildSettings += fmt.Sprintf("    --//build/bazel/product_config:cfi_exclude_paths=%s\n", strings.Join(productVariables.CFIExcludePaths, ","))
-	buildSettings += fmt.Sprintf("    --//build/bazel/product_config:enable_cfi=%t\n", proptools.BoolDefault(productVariables.EnableCFI, true))
-	buildSettings += fmt.Sprintf("    --//build/bazel/product_config:device_abi=%s\n", strings.Join(productVariables.DeviceAbi, ","))
-	result := ""
-	for _, suffix := range bazelPlatformSuffixes {
-		result += "  " + label + suffix + "\n" + buildSettings
+func platformMappingSingleProduct(label string, productVariables *android.ProductVariables, result *strings.Builder) {
+	targetBuildVariant := "user"
+	if proptools.Bool(productVariables.Eng) {
+		targetBuildVariant = "eng"
+	} else if proptools.Bool(productVariables.Debuggable) {
+		targetBuildVariant = "userdebug"
 	}
-	return result
+
+	for _, suffix := range bazelPlatformSuffixes {
+		result.WriteString("  ")
+		result.WriteString(label)
+		result.WriteString(suffix)
+		result.WriteString("\n")
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:always_use_prebuilt_sdks=%t\n", proptools.Bool(productVariables.Always_use_prebuilt_sdks)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:apex_global_min_sdk_version_override=%s\n", proptools.String(productVariables.ApexGlobalMinSdkVersionOverride)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:build_id=%s\n", proptools.String(productVariables.BuildId)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:build_version_tags=%s\n", strings.Join(productVariables.BuildVersionTags, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:certificate_overrides=%s\n", strings.Join(productVariables.CertificateOverrides, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:cfi_exclude_paths=%s\n", strings.Join(productVariables.CFIExcludePaths, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:cfi_include_paths=%s\n", strings.Join(productVariables.CFIIncludePaths, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:compressed_apex=%t\n", proptools.Bool(productVariables.CompressedApex)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:default_app_certificate=%s\n", proptools.String(productVariables.DefaultAppCertificate)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:device_abi=%s\n", strings.Join(productVariables.DeviceAbi, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:device_max_page_size_supported=%s\n", proptools.String(productVariables.DeviceMaxPageSizeSupported)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:device_name=%s\n", proptools.String(productVariables.DeviceName)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:device_product=%s\n", proptools.String(productVariables.DeviceProduct)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:enable_cfi=%t\n", proptools.BoolDefault(productVariables.EnableCFI, true)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:manifest_package_name_overrides=%s\n", strings.Join(productVariables.ManifestPackageNameOverrides, ",")))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:platform_version_name=%s\n", proptools.String(productVariables.Platform_version_name)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:product_brand=%s\n", productVariables.ProductBrand))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:product_manufacturer=%s\n", productVariables.ProductManufacturer))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:target_build_variant=%s\n", targetBuildVariant))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:tidy_checks=%s\n", proptools.String(productVariables.TidyChecks)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:unbundled_build=%t\n", proptools.Bool(productVariables.Unbundled_build)))
+		result.WriteString(fmt.Sprintf("    --//build/bazel/product_config:unbundled_build_apps=%s\n", strings.Join(productVariables.Unbundled_build_apps, ",")))
+	}
 }
 
 func starlarkMapToProductVariables(in map[string]starlark.Value) (android.ProductVariables, error) {
-	var err error
 	result := android.ProductVariables{}
-	result.ApexGlobalMinSdkVersionOverride, err = starlark_import.UnmarshalNoneable[string](in["ApexGlobalMinSdkVersionOverride"])
-	if err != nil {
-		return result, err
+	productVarsReflect := reflect.ValueOf(&result).Elem()
+	for i := 0; i < productVarsReflect.NumField(); i++ {
+		field := productVarsReflect.Field(i)
+		fieldType := productVarsReflect.Type().Field(i)
+		name := fieldType.Name
+		if name == "BootJars" || name == "ApexBootJars" || name == "VendorVars" ||
+			name == "VendorSnapshotModules" || name == "RecoverySnapshotModules" {
+			// These variables have more complicated types, and we don't need them right now
+			continue
+		}
+		if _, ok := in[name]; ok {
+			switch field.Type().Kind() {
+			case reflect.Bool:
+				val, err := starlark_import.Unmarshal[bool](in[name])
+				if err != nil {
+					return result, err
+				}
+				field.SetBool(val)
+			case reflect.String:
+				val, err := starlark_import.Unmarshal[string](in[name])
+				if err != nil {
+					return result, err
+				}
+				field.SetString(val)
+			case reflect.Slice:
+				if field.Type().Elem().Kind() != reflect.String {
+					return result, fmt.Errorf("slices of types other than strings are unimplemented")
+				}
+				val, err := starlark_import.UnmarshalReflect(in[name], field.Type())
+				if err != nil {
+					return result, err
+				}
+				field.Set(val)
+			case reflect.Pointer:
+				switch field.Type().Elem().Kind() {
+				case reflect.Bool:
+					val, err := starlark_import.UnmarshalNoneable[bool](in[name])
+					if err != nil {
+						return result, err
+					}
+					field.Set(reflect.ValueOf(val))
+				case reflect.String:
+					val, err := starlark_import.UnmarshalNoneable[string](in[name])
+					if err != nil {
+						return result, err
+					}
+					field.Set(reflect.ValueOf(val))
+				case reflect.Int:
+					val, err := starlark_import.UnmarshalNoneable[int](in[name])
+					if err != nil {
+						return result, err
+					}
+					field.Set(reflect.ValueOf(val))
+				default:
+					return result, fmt.Errorf("pointers of types other than strings/bools are unimplemented: %s", field.Type().Elem().Kind().String())
+				}
+			default:
+				return result, fmt.Errorf("unimplemented type: %s", field.Type().String())
+			}
+		}
 	}
-	result.CFIIncludePaths, err = starlark_import.Unmarshal[[]string](in["CFIIncludePaths"])
-	if err != nil {
-		return result, err
-	}
-	result.CFIExcludePaths, err = starlark_import.Unmarshal[[]string](in["CFIExcludePaths"])
-	if err != nil {
-		return result, err
-	}
-	result.EnableCFI, err = starlark_import.UnmarshalNoneable[bool](in["EnableCFI"])
-	if err != nil {
-		return result, err
-	}
-	result.DeviceAbi, err = starlark_import.Unmarshal[[]string](in["DeviceAbi"])
-	if err != nil {
-		return result, err
-	}
+
 	return result, nil
 }
diff --git a/bp2build/bp2build_product_config_test.go b/bp2build/bp2build_product_config_test.go
new file mode 100644
index 0000000..3dd53ce
--- /dev/null
+++ b/bp2build/bp2build_product_config_test.go
@@ -0,0 +1,88 @@
+package bp2build
+
+import (
+	"android/soong/android"
+	"android/soong/starlark_import"
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	"github.com/google/blueprint/proptools"
+	"go.starlark.net/starlark"
+)
+
+func createStarlarkValue(t *testing.T, code string) starlark.Value {
+	t.Helper()
+	result, err := starlark.ExecFile(&starlark.Thread{}, "main.bzl", "x = "+code, nil)
+	if err != nil {
+		t.Error(err)
+	}
+	return result["x"]
+}
+
+func createStarlarkProductVariablesMap(t *testing.T, code string) map[string]starlark.Value {
+	t.Helper()
+	rawValue := createStarlarkValue(t, code)
+	value, err := starlark_import.Unmarshal[map[string]starlark.Value](rawValue)
+	if err != nil {
+		t.Error(err)
+	}
+	return value
+}
+
+func TestStarlarkMapToProductVariables(t *testing.T) {
+	thirty := 30
+	cases := []struct {
+		starlark string
+		result   android.ProductVariables
+	}{
+		{
+			starlark: `{"CompressedApex": True}`,
+			result:   android.ProductVariables{CompressedApex: proptools.BoolPtr(true)},
+		},
+		{
+			starlark: `{"ApexGlobalMinSdkVersionOverride": "Tiramisu"}`,
+			result:   android.ProductVariables{ApexGlobalMinSdkVersionOverride: proptools.StringPtr("Tiramisu")},
+		},
+		{
+			starlark: `{"ProductManufacturer": "Google"}`,
+			result:   android.ProductVariables{ProductManufacturer: "Google"},
+		},
+		{
+			starlark: `{"Unbundled_build_apps": ["app1", "app2"]}`,
+			result:   android.ProductVariables{Unbundled_build_apps: []string{"app1", "app2"}},
+		},
+		{
+			starlark: `{"Platform_sdk_version": 30}`,
+			result:   android.ProductVariables{Platform_sdk_version: &thirty},
+		},
+		{
+			starlark: `{"HostFakeSnapshotEnabled": True}`,
+			result:   android.ProductVariables{HostFakeSnapshotEnabled: true},
+		},
+	}
+
+	for _, testCase := range cases {
+		productVariables, err := starlarkMapToProductVariables(createStarlarkProductVariablesMap(t,
+			testCase.starlark))
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		if !reflect.DeepEqual(testCase.result, productVariables) {
+			expected, err := json.Marshal(testCase.result)
+			if err != nil {
+				t.Error(err)
+				continue
+			}
+			actual, err := json.Marshal(productVariables)
+			if err != nil {
+				t.Error(err)
+				continue
+			}
+			expectedStr := string(expected)
+			actualStr := string(actual)
+			t.Errorf("expected %q, but got %q", expectedStr, actualStr)
+		}
+	}
+}
diff --git a/starlark_import/unmarshal.go b/starlark_import/unmarshal.go
index 33c0cd9..b243471 100644
--- a/starlark_import/unmarshal.go
+++ b/starlark_import/unmarshal.go
@@ -34,6 +34,9 @@
 		return reflect.ValueOf(value), nil
 	}
 	zero := reflect.Zero(ty)
+	if value == nil {
+		panic("nil value")
+	}
 	var result reflect.Value
 	if ty.Kind() == reflect.Interface {
 		var err error