TS Compiler Wrapper

compile.ts

function compiler (configFilePath: string) {
  // tslint:disable-next-line no-any
  const host: ts.ParseConfigFileHost = ts.sys as any;
  // Fix after https://github.com/Microsoft/TypeScript/issues/18217
  host.onUnRecoverableConfigFileDiagnostic = printDiagnostic;
  const parsedCmd = ts.getParsedCommandLineOfConfigFile(configFilePath, undefined, host);
  host.onUnRecoverableConfigFileDiagnostic = undefined;

  const {options, fileNames} = parsedCmd;

  const program = ts.createProgram({
    rootNames: fileNames,
    options,
  });

  const emitResult = program.emit(
    undefined,
    undefined,
    undefined,
    undefined,
    {
      before: [],
      after: [],
      afterDeclarations: [],
    }
  );

  ts.getPreEmitDiagnostics(program)
    .concat(emitResult.diagnostics)
    .forEach(diagnostic => {
      let msg = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
      if (diagnostic.file) {
        const {line, character} = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
        msg = `${diagnostic.file.fileName} (${line + 1},${character + 1}): ${msg}`;
      }
      console.error(msg);
    });

  const exitCode = emitResult.emitSkipped ? 1 : 0;
  if (exitCode) {
    console.log(red(`Process exiting with code '${exitCode}'.`));
    process.exit(exitCode);
  }
}