runner-watch.ts — react Source File

Source Code

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import watcher from '@parcel/watcher';
import path from 'path';
import ts from 'typescript';
import {FIXTURES_PATH, BABEL_PLUGIN_ROOT} from './constants';
import {TestFilter, getFixtures} from './fixture-utils';
import {execSync} from 'child_process';

export function watchSrc(
  onStart: () => void,
  onComplete: (isSuccess: boolean) => void,
): ts.WatchOfConfigFile<ts.SemanticDiagnosticsBuilderProgram> {
  const configPath = ts.findConfigFile(
    /*searchPath*/ BABEL_PLUGIN_ROOT,
    ts.sys.fileExists,
    'tsconfig.json',
  );
  if (!configPath) {
    throw new Error("Could not find a valid 'tsconfig.json'.");
  }
  const createProgram = ts.createSemanticDiagnosticsBuilderProgram;
  const host = ts.createWatchCompilerHost(
    configPath,
    undefined,
    ts.sys,
    createProgram,
    () => {}, // we manually report errors in afterProgramCreate
    () => {}, // we manually report watch status
  );

  const origCreateProgram = host.createProgram;
  host.createProgram = (rootNames, options, host, oldProgram) => {
    onStart();
    return origCreateProgram(rootNames, options, host, oldProgram);
  };
  host.afterProgramCreate = program => {
    /**
     * Avoid calling original postProgramCreate because it always emits tsc
     * compilation output
     */

    // syntactic diagnostics refer to javascript syntax
    const errors = program
      .getSyntacticDiagnostics()
      .filter(diag => diag.category === ts.DiagnosticCategory.Error);
    // semantic diagnostics refer to typescript semantics
    errors.push(
      ...program
        .getSemanticDiagnostics()
        .filter(diag => diag.category === ts.DiagnosticCategory.Error),
    );

    if (errors.length > 0) {
      for (const diagnostic of errors) {
// ... (392 more lines)