TypeScript Project.emitToMemory方法代码示例

/** setups and returns the fixtures for testing */
function setupFixtures() {
  const basePath = process.cwd();
  const buildPath = `${basePath}/tools/ts_library_builder/testdata`;
  const outputFile = `${buildPath}/lib.output.d.ts`;
  const inputProject = new Project({
    compilerOptions: {
      baseUrl: basePath,
      declaration: true,
      emitDeclarationOnly: true,
      module: ModuleKind.AMD,
      moduleResolution: ModuleResolutionKind.NodeJs,
      strict: true,
      stripInternal: true,
      target: ScriptTarget.ESNext
    }
  });
  inputProject.addExistingSourceFiles([
    `${buildPath}/globals.ts`,
    `${buildPath}/api.ts`
  ]);
  const declarationProject = new Project({
    compilerOptions: {},
    useVirtualFileSystem: true
  });
  loadDtsFiles(declarationProject);
  for (const { filePath, text } of inputProject.emitToMemory().getFiles()) {
    declarationProject.createSourceFile(filePath, text);
  }
  const outputProject = new Project({
    compilerOptions: {},
    useVirtualFileSystem: true
  });
  loadDtsFiles(outputProject);
  const outputSourceFile = outputProject.createSourceFile(outputFile);
  const debug = true;

  return {
    basePath,
    buildPath,
    inputProject,
    outputFile,
    declarationProject,
    outputProject,
    outputSourceFile,
    debug
  };
}

export function main({
  basePath,
  buildPath,
  inline,
  debug,
  outFile,
  silent
}: BuildLibraryOptions): void {
  if (!silent) {
    console.log("-----");
    console.log("build_lib");
    console.log();
    console.log(`basePath: "${basePath}"`);
    console.log(`buildPath: "${buildPath}"`);
    if (inline && inline.length) {
      console.log(`inline:`);
      for (const filename of inline) {
        console.log(`  "${filename}"`);
      }
    }
    console.log(`debug: ${!!debug}`);
    console.log(`outFile: "${outFile}"`);
    console.log();
  }

  // the inputProject will take in the TypeScript files that are internal
  // to Deno to be used to generate the library
  const inputProject = new Project({
    compilerOptions: {
      baseUrl: basePath,
      declaration: true,
      emitDeclarationOnly: true,
      lib: [],
      module: ModuleKind.AMD,
      moduleResolution: ModuleResolutionKind.NodeJs,
      noLib: true,
      paths: {
        "*": ["*", `${buildPath}/*`]
      },
      preserveConstEnums: true,
      strict: true,
      stripInternal: true,
      target: ScriptTarget.ESNext
    }
  });

  // Add the input files we will need to generate the declarations, `globals`
  // plus any modules that are importable in the runtime need to be added here
  // plus the `lib.esnext` which is used as the base library
  inputProject.addExistingSourceFiles([
    `${basePath}/node_modules/typescript/lib/lib.esnext.d.ts`,
    `${basePath}/js/deno.ts`,
    `${basePath}/js/globals.ts`
  ]);

  // emit the project, which will be only the declaration files
  const inputEmitResult = inputProject.emitToMemory();

  const inputDiagnostics = inputEmitResult
    .getDiagnostics()
    .map(d => d.compilerObject);
  logDiagnostics(inputDiagnostics);
  if (inputDiagnostics.length) {
    process.exit(1);
  }

  // the declaration project will be the target for the emitted files from
  // the input project, these will be used to transfer information over to
  // the final library file
  const declarationProject = new Project({
    compilerOptions: {
      baseUrl: basePath,
      moduleResolution: ModuleResolutionKind.NodeJs,
      noLib: true,
      paths: {
        "*": ["*", `${buildPath}/*`]
      },
      strict: true,
      target: ScriptTarget.ESNext
    },
    useVirtualFileSystem: true
  });

  // we don't want to add to the declaration project any of the original
  // `.ts` source files, so we need to filter those out
  const jsPath = normalizeSlashes(`${basePath}/js`);
  const inputProjectFiles = inputProject
    .getSourceFiles()
    .map(sourceFile => sourceFile.getFilePath())
    .filter(filePath => !filePath.startsWith(jsPath));
  loadFiles(declarationProject, inputProjectFiles);

  // now we add the emitted declaration files from the input project
  for (const { filePath, text } of inputEmitResult.getFiles()) {
    declarationProject.createSourceFile(filePath, text);
  }

  // the outputProject will contain the final library file we are looking to
  // build
  const outputProject = new Project({
//.........这里部分代码省略.........