TypeScript schematics.noop函数代码示例

  return (host: Tree, context: SchematicContext) => {
    const workspace = getWorkspace(host);
    if (Object.keys(workspace.projects).length <= 0) {
      throw new SchematicsException('Could not find any project.');
    }
    if (!schema.project) {
      schema.project = Object.keys(workspace.projects)[0];
    }
    const project = workspace.projects[schema.project];

    resolveSchema(host, project, schema);

    schema.componentName = buildComponentName(schema, (project as any).prefix);

    const templateSource = apply(url('./files'), [
      schema.spec ? noop() : filter(path => !path.endsWith('.spec.ts')),
      schema.inlineStyle
        ? filter(path => !path.endsWith('.__styleext__'))
        : noop(),
      schema.inlineTemplate ? filter(path => !path.endsWith('.html')) : noop(),
      template({
        ...strings,
        'if-flat': (s: string) => (schema.flat ? '' : s),
        ...schema,
      }),
      move(null, schema.path + '/'),
    ]);

    return chain([
      branchAndMerge(
        chain([addDeclaration(schema), mergeWith(templateSource)]),
      ),
    ])(host, context);
  };

  return async (host: Tree) => {
    if (options.path === undefined) {
      options.path = await createDefaultPath(host, options.project as string);
    }

    options.module = findModuleFromOptions(host, options);

    const parsedPath = parseName(options.path, options.name);
    options.name = parsedPath.name;
    options.path = parsedPath.path;

    // todo remove these when we remove the deprecations
    options.skipTests = options.skipTests || !options.spec;

    const templateSource = apply(url('./files'), [
      options.skipTests ? filter(path => !path.endsWith('.spec.ts.template')) : noop(),
      applyTemplates({
        ...strings,
        'if-flat': (s: string) => options.flat ? '' : s,
        ...options,
      }),
      move(parsedPath.path),
    ]);

    return chain([
      addDeclarationToNgModule(options),
      mergeWith(templateSource),
      options.lintFix ? applyLintFix(options.path) : noop(),
    ]);
  };

/**
 * Scaffolds the basics of a Angular Material application, this includes:
 *  - Add Packages to package.json
 *  - Adds pre-built themes to styles.ext
 *  - Adds Browser Animation to app.module
 */
export default function(options: Schema): Rule {
  return chain([
    options && options.skipPackageJson ? noop() : addFormlyToPackageJson(),
    addFormlyModuleConfig(options),
    options && options.uiTheme ? addUITheme(options) : noop(),
  ]);
}

  return (host: Tree) => {
    const workspace = getWorkspace(host);
    if (!options.project) {
      throw new SchematicsException('Option (project) is required.');
    }
    const project = workspace.projects[options.project];

    if (options.path === undefined) {
      options.path = buildDefaultPath(project);
    }

    const parsedPath = parseName(options.path, options.name);
    options.name = parsedPath.name;
    options.path = parsedPath.path;

    const templateSource = apply(url('./files'), [
      options.spec ? noop() : filter(path => !path.endsWith('.spec.ts')),
      template({
        ...strings,
        'if-flat': (s: string) => options.flat ? '' : s,
        ...options,
      }),
      move(parsedPath.path),
    ]);

    return chain([
      mergeWith(templateSource),
      options.lintFix ? applyLintFix(options.path) : noop(),
    ]);
  };

  return (host: Tree, context: SchematicContext) => {
    if (!options.project) {
      throw new SchematicsException('Option (project) is required.');
    }

    const project = getProject(host, options.project);

    if (options.path === undefined) {
      options.path = buildDefaultPath(project);
    }

    options.type = !!options.type ? `.${options.type}` : '';

    const parsedPath = parseName(options.path, options.name);
    options.name = parsedPath.name;
    options.path = parsedPath.path;

    // todo remove these when we remove the deprecations
    options.skipTests = options.skipTests || !options.spec;

    const templateSource = apply(url('./files'), [
      options.skipTests ? filter(path => !path.endsWith('.spec.ts')) : noop(),
      template({
        ...strings,
        ...options,
      }),
      move(parsedPath.path),
    ]);

    return chain([
      branchAndMerge(mergeWith(templateSource)),
      options.lintFix ? applyLintFix(options.path) : noop(),
    ]);
  };

/**
 * Update a project's target, maybe. Only if it's a builder supported and the options look right.
 * This is a rule factory so we return the new rule (or noop if we don't support doing the change).
 * @param root The root of the project source.
 * @param targetObject The target information.
 * @private
 */
function _updateProjectTarget(targetObject: JsonObject): Rule {
  // Make sure we're using the correct builder.
  if (targetObject.builder !== '@angular-devkit/build-angular:browser'
      || !isJsonObject(targetObject.options)) {
    return noop();
  }
  const options = targetObject.options;
  if (typeof options.polyfills != 'string') {
    return noop();
  }

  const polyfillsToUpdate = [options.polyfills];
  const configurations = targetObject.configurations;
  if (isJsonObject(configurations)) {
    for (const configName of Object.keys(configurations)) {
      const config = configurations[configName];

      // Just in case, only do non-AOT configurations.
      if (isJsonObject(config)
          && typeof config.polyfills == 'string'
          && config.aot !== true) {
        polyfillsToUpdate.push(config.polyfills);
      }
    }
  }

  return chain(
    polyfillsToUpdate.map(polyfillPath => {
      return (tree: Tree) => _removeReflectFromPolyfills(tree, polyfillPath);
    }),
  );
}

function addFilesToRoot(options: ApplicationOptions) {
  return chain([
    mergeWith(
      apply(url('./files/src'), [
        options.i18n ? noop() : filter(p => p.indexOf('i18n') === -1),
        options.form ? noop() : filter(p => p.indexOf('json-schema') === -1),
        template({
          utils: strings,
          ...options,
          dot: '.',
          VERSION,
          ZORROVERSION,
        }),
        move(appSourceRoot),
      ]),
    ),
    mergeWith(
      apply(url('./files/root'), [
        options.i18n ? noop() : filter(p => p.indexOf('i18n') === -1),
        options.form ? noop() : filter(p => p.indexOf('json-schema') === -1),
        template({
          utils: strings,
          ...options,
          dot: '.',
          VERSION,
          ZORROVERSION,
        }),
        move('/'),
      ]),
    ),
  ]);
}

export default function(options: Schema): Rule {
  return chain([
    options && options.skipPackageJson ? noop() : addPackageJsonDependencies(),
    options && options.skipPackageJson ? noop() : installPackageJsonDependencies(),
    options && options.skipModuleImport ? noop() : addModuleToImports(options),
    options && options.skipPolyfill ? noop() : addPolyfillToScripts(options)
  ]);
}