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generate_managed_option.go
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generate_managed_option.go
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// Copyright 2020-2024 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bufconfig
import (
"errors"
"fmt"
"strconv"
"strings"
"google.golang.org/protobuf/types/descriptorpb"
)
// FileOption is a file option.
type FileOption int
const (
// FileOptionUnspecified is an unspecified file option.
FileOptionUnspecified FileOption = iota
// FileOptionJavaPackage is the file option java_package.
FileOptionJavaPackage
// FileOptionJavaPackagePrefix is the file option java_package_prefix.
FileOptionJavaPackagePrefix
// FileOptionJavaPackageSuffix is the file option java_package_suffix.
FileOptionJavaPackageSuffix
// FileOptionJavaOuterClassname is the file option java_outer_classname.
FileOptionJavaOuterClassname
// FileOptionJavaMultipleFiles is the file option java_multiple_files.
FileOptionJavaMultipleFiles
// FileOptionJavaStringCheckUtf8 is the file option java_string_check_utf8.
FileOptionJavaStringCheckUtf8
// FileOptionOptimizeFor is the file option optimize_for.
FileOptionOptimizeFor
// FileOptionGoPackage is the file option go_package.
FileOptionGoPackage
// FileOptionGoPackagePrefix is the file option go_package_prefix.
FileOptionGoPackagePrefix
// FileOptionCcEnableArenas is the file option cc_enable_arenas.
FileOptionCcEnableArenas
// FileOptionObjcClassPrefix is the file option objc_class_prefix.
FileOptionObjcClassPrefix
// FileOptionCsharpNamespace is the file option csharp_namespace.
FileOptionCsharpNamespace
// FileOptionCsharpNamespacePrefix is the file option csharp_namespace_prefix.
FileOptionCsharpNamespacePrefix
// FileOptionPhpNamespace is the file option php_namespace.
FileOptionPhpNamespace
// FileOptionPhpMetadataNamespace is the file option php_metadata_namespace.
FileOptionPhpMetadataNamespace
// FileOptionPhpMetadataNamespaceSuffix is the file option php_metadata_namespace_suffix.
FileOptionPhpMetadataNamespaceSuffix
// FileOptionRubyPackage is the file option ruby_package.
FileOptionRubyPackage
// FileOptionRubyPackageSuffix is the file option ruby_package_suffix.
FileOptionRubyPackageSuffix
)
// String implements fmt.Stringer.
func (f FileOption) String() string {
s, ok := fileOptionToString[f]
if !ok {
return strconv.Itoa(int(f))
}
return s
}
// FieldOption is a field option.
type FieldOption int
const (
// FieldOptionUnspecified is an unspecified field option.
FieldOptionUnspecified FieldOption = iota
// FieldOptionJSType is the field option js_type.
FieldOptionJSType
)
// String implements fmt.Stringer.
func (f FieldOption) String() string {
s, ok := fieldOptionToString[f]
if !ok {
return strconv.Itoa(int(f))
}
return s
}
// *** PRIVATE ***
var (
fileOptionToString = map[FileOption]string{
FileOptionJavaPackage: "java_package",
FileOptionJavaPackagePrefix: "java_package_prefix",
FileOptionJavaPackageSuffix: "java_package_suffix",
FileOptionJavaOuterClassname: "java_outer_classname",
FileOptionJavaMultipleFiles: "java_multiple_files",
FileOptionJavaStringCheckUtf8: "java_string_check_utf8",
FileOptionOptimizeFor: "optimize_for",
FileOptionGoPackage: "go_package",
FileOptionGoPackagePrefix: "go_package_prefix",
FileOptionCcEnableArenas: "cc_enable_arenas",
FileOptionObjcClassPrefix: "objc_class_prefix",
FileOptionCsharpNamespace: "csharp_namespace",
FileOptionCsharpNamespacePrefix: "csharp_namespace_prefix",
FileOptionPhpNamespace: "php_namespace",
FileOptionPhpMetadataNamespace: "php_metadata_namespace",
FileOptionPhpMetadataNamespaceSuffix: "php_metadata_namespace_suffix",
FileOptionRubyPackage: "ruby_package",
FileOptionRubyPackageSuffix: "ruby_package_suffix",
}
stringToFileOption = map[string]FileOption{
"java_package": FileOptionJavaPackage,
"java_package_prefix": FileOptionJavaPackagePrefix,
"java_package_suffix": FileOptionJavaPackageSuffix,
"java_outer_classname": FileOptionJavaOuterClassname,
"java_multiple_files": FileOptionJavaMultipleFiles,
"java_string_check_utf8": FileOptionJavaStringCheckUtf8,
"optimize_for": FileOptionOptimizeFor,
"go_package": FileOptionGoPackage,
"go_package_prefix": FileOptionGoPackagePrefix,
"cc_enable_arenas": FileOptionCcEnableArenas,
"objc_class_prefix": FileOptionObjcClassPrefix,
"csharp_namespace": FileOptionCsharpNamespace,
"csharp_namespace_prefix": FileOptionCsharpNamespacePrefix,
"php_namespace": FileOptionPhpNamespace,
"php_metadata_namespace": FileOptionPhpMetadataNamespace,
"php_metadata_namespace_suffix": FileOptionPhpMetadataNamespaceSuffix,
"ruby_package": FileOptionRubyPackage,
"ruby_package_suffix": FileOptionRubyPackageSuffix,
}
fileOptionToParseOverrideValueFunc = map[FileOption]func(interface{}) (interface{}, error){
FileOptionJavaPackage: parseOverrideValue[string],
FileOptionJavaPackagePrefix: parseOverrideValue[string],
FileOptionJavaPackageSuffix: parseOverrideValue[string],
FileOptionOptimizeFor: parseOverrideValueOptimizeMode,
FileOptionJavaOuterClassname: parseOverrideValue[string],
FileOptionJavaMultipleFiles: parseOverrideValue[bool],
FileOptionJavaStringCheckUtf8: parseOverrideValue[bool],
FileOptionGoPackage: parseOverrideValue[string],
FileOptionGoPackagePrefix: parseOverrideValue[string],
FileOptionCcEnableArenas: parseOverrideValue[bool],
FileOptionObjcClassPrefix: parseOverrideValue[string], // objc_class_prefix is in descriptor.proto
FileOptionCsharpNamespace: parseOverrideValue[string],
FileOptionCsharpNamespacePrefix: parseOverrideValue[string],
FileOptionPhpNamespace: parseOverrideValue[string],
FileOptionPhpMetadataNamespace: parseOverrideValue[string],
FileOptionPhpMetadataNamespaceSuffix: parseOverrideValue[string],
FileOptionRubyPackage: parseOverrideValue[string],
FileOptionRubyPackageSuffix: parseOverrideValue[string],
}
fieldOptionToString = map[FieldOption]string{
FieldOptionJSType: "jstype",
}
stringToFieldOption = map[string]FieldOption{
"jstype": FieldOptionJSType,
}
fieldOptionToParseOverrideValueFunc = map[FieldOption]func(interface{}) (interface{}, error){
FieldOptionJSType: parseOverrideValueJSType,
}
)
func parseFileOption(s string) (FileOption, error) {
s = strings.ToLower(strings.TrimSpace(s))
if s == "" {
return 0, errors.New("empty file_option")
}
f, ok := stringToFileOption[s]
if ok {
return f, nil
}
return 0, fmt.Errorf("unknown file_option: %q", s)
}
func parseFieldOption(s string) (FieldOption, error) {
s = strings.ToLower(strings.TrimSpace(s))
if s == "" {
return 0, errors.New("empty field_option")
}
f, ok := stringToFieldOption[s]
if ok {
return f, nil
}
return 0, fmt.Errorf("unknown field_option: %q", s)
}
func parseOverrideValue[T string | bool](overrideValue interface{}) (interface{}, error) {
parsedValue, ok := overrideValue.(T)
if !ok {
return nil, fmt.Errorf("expected a %T, got %T", parsedValue, overrideValue)
}
return parsedValue, nil
}
func parseOverrideValueOptimizeMode(overrideValue interface{}) (interface{}, error) {
optimizeModeName, ok := overrideValue.(string)
if !ok {
return nil, errors.New("must be one of SPEED, CODE_SIZE or LITE_RUNTIME")
}
optimizeMode, ok := descriptorpb.FileOptions_OptimizeMode_value[optimizeModeName]
if !ok {
return nil, errors.New("must be one of SPEED, CODE_SIZE or LITE_RUNTIME")
}
return descriptorpb.FileOptions_OptimizeMode(optimizeMode), nil
}
func parseOverrideValueJSType(override interface{}) (interface{}, error) {
jsTypeName, ok := override.(string)
if !ok {
return nil, errors.New("must be one of JS_NORMAL, JS_STRING or JS_NUMBER")
}
jsTypeEnum, ok := descriptorpb.FieldOptions_JSType_value[jsTypeName]
if !ok {
return nil, errors.New("must be one of JS_NORMAL, JS_STRING or JS_NUMBER")
}
return descriptorpb.FieldOptions_JSType(jsTypeEnum), nil
}
// If the file or field option override value is one of the supported enum types,
// then we want to write out the string representation of the enum value, not
// the corresponding int32.
// Otherwise we just return the value.
func getOverrideValue(fileOptionName string, fieldOptionName string, value interface{}) (interface{}, error) {
var optionName string
if fileOptionName != "" && fieldOptionName != "" {
return externalGenerateManagedConfigV2{}, fmt.Errorf("field option %s and file option %s set on the same override", fileOptionName, fieldOptionName)
}
if fileOptionName != "" {
optionName = fileOptionName
fileOption, err := parseFileOption(fileOptionName)
if err != nil {
return nil, err
}
switch fileOption {
case
FileOptionJavaPackage,
FileOptionJavaPackagePrefix,
FileOptionJavaPackageSuffix,
FileOptionJavaOuterClassname,
FileOptionJavaMultipleFiles,
FileOptionJavaStringCheckUtf8,
FileOptionGoPackage,
FileOptionGoPackagePrefix,
FileOptionCcEnableArenas,
FileOptionObjcClassPrefix,
FileOptionCsharpNamespace,
FileOptionCsharpNamespacePrefix,
FileOptionPhpNamespace,
FileOptionPhpMetadataNamespace,
FileOptionPhpMetadataNamespaceSuffix,
FileOptionRubyPackage,
FileOptionRubyPackageSuffix:
return value, nil
case FileOptionOptimizeFor:
if optimizeModeValue, ok := value.(descriptorpb.FileOptions_OptimizeMode); ok {
return optimizeModeValue.String(), nil
}
}
}
if fieldOptionName != "" {
optionName = fieldOptionName
fieldOption, err := parseFieldOption(fieldOptionName)
if err != nil {
return nil, err
}
switch fieldOption {
case FieldOptionJSType:
if jsTypeValue, ok := value.(descriptorpb.FieldOptions_JSType); ok {
return jsTypeValue.String(), nil
}
}
}
return nil, fmt.Errorf("unable to get override value for %s: %v", optionName, value)
}