fix: Fix integration test codegen script (#291)

The codegen script was importing plugin.ts which expects to read from stdin (which is empty), then calls process.exit. This caused codegen to fail silently.

Co-authored-by: Eric Butler <eric@level.com>

integration/codegen.ts

@@ -1,14 +1,13 @@
-import { CodeGeneratorRequest } from 'ts-proto-descriptors';
+import { CodeGeneratorRequest, FileDescriptorProto } from 'ts-proto-descriptors';
 import { mkdir, readFile, writeFile } from 'fs';
 import { parse } from 'path';
 import { promisify } from 'util';
 import { generateFile, makeUtils } from '../src/main';
 import { createTypeMap } from '../src/types';
-import { prefixDisableLinter } from '../src/utils';
+import { prefixDisableLinter, protoFilesToGenerate } from '../src/utils';
 import { getTsPoetOpts, optionsFromParameter } from '../src/options';
 import { Context } from '../src/context';
 import { generateTypeRegistry } from '../src/generate-type-registry';
-import { protoFilesToGenerate } from '../src/plugin';
 
 /**
  * Generates output for our integration tests from their example proto files.

src/plugin.ts

@@ -5,17 +5,13 @@ import {
   FileDescriptorProto,
 } from 'ts-proto-descriptors';
 import { promisify } from 'util';
-import { prefixDisableLinter, readToBuffer } from './utils';
+import { prefixDisableLinter, protoFilesToGenerate, readToBuffer } from './utils';
 import { generateFile, makeUtils } from './main';
 import { createTypeMap } from './types';
 import { Context } from './context';
 import { getTsPoetOpts, optionsFromParameter } from './options';
 import { generateTypeRegistry } from './generate-type-registry';
 
-export function protoFilesToGenerate(request: CodeGeneratorRequest): FileDescriptorProto[] {
-  return request.protoFile.filter((f) => request.fileToGenerate.includes(f.name));
-}
-
 // this would be the plugin called by the protoc compiler
 async function main() {
   const stdin = await readToBuffer(process.stdin);

src/utils.ts

@@ -1,8 +1,12 @@
 import { code, Code } from 'ts-poet';
-import { FileDescriptorProto } from 'ts-proto-descriptors';
+import { CodeGeneratorRequest, FileDescriptorProto } from 'ts-proto-descriptors';
 import ReadStream = NodeJS.ReadStream;
 import { SourceDescription } from './sourceInfo';
 
+export function protoFilesToGenerate(request: CodeGeneratorRequest): FileDescriptorProto[] {
+  return request.protoFile.filter((f) => request.fileToGenerate.includes(f.name));
+}
+
 export function readToBuffer(stream: ReadStream): Promise<Buffer> {
   return new Promise((resolve) => {
     const ret: Array<Buffer | string> = [];