56 lines
2.0 KiB
TypeScript
56 lines
2.0 KiB
TypeScript
// Copyright 2022 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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import * as fs from 'fs';
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import {FileDescriptorSet} from 'google-protobuf/google/protobuf/descriptor_pb';
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function buildModulePath(rootDir: string, fileName: string): string {
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const name = `${rootDir}/${fileName}`;
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return name.replace(/\.proto$/, '_pb');
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}
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export default function generateTemplate(outputPath: string, descriptorDataPath: string, templatePath: string, protoRootDir: string) {
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let template = fs.readFileSync(templatePath).toString();
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const descriptorSetBinary = fs.readFileSync(descriptorDataPath);
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const base64DescriptorSet = descriptorSetBinary.toString('base64');
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const fileDescriptorSet = FileDescriptorSet.deserializeBinary(
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Buffer.from(descriptorSetBinary)
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);
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const imports = [];
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const moduleDictionary = [];
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const fileList = fileDescriptorSet.getFileList();
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for (let i = 0; i < fileList.length; i++) {
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const file = fileList[i];
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const modulePath = buildModulePath(".", file.getName()!);
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const moduleName = 'proto_' + i;
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imports.push(`import * as ${moduleName} from '${modulePath}';`);
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const key = file.getName()!;
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moduleDictionary.push(`['${key}', ${moduleName}],`);
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}
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template = template.replace(
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'{TEMPLATE_descriptor_binary}',
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base64DescriptorSet
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);
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template = template.replace('// TEMPLATE_proto_imports', imports.join('\n'));
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template = template.replace(
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'// TEMPLATE_module_map',
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moduleDictionary.join('\n')
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);
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fs.writeFileSync(outputPath, template);
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}
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