原理图 - 管理模板文件复制错误

Question

我正在设法将原理图 files 目录中的一些文件复制到主项目目标文件夹：

function addTplFiles(path: string): Source {
  // copy templates
  return apply(url('./files'), [
    move(path as string)
  ]);
}

export function ngAdd(options: ISchema): Rule {
  return (host: Tree/*, context: SchematicContext*/) => {
    // get the workspace config of the consuming project
    // i.e. angular.json file
    const workspace = getWorkspace(host);
    // identify the project config which is using our library
    // or default to the default project in consumer workspace
    const project = getProjectFromWorkspace(
      workspace,
      options.project || workspace.defaultProject
    );
    const projectType = project.projectType === 'application' ? 'app' : 'lib';
    const path = (options.path === undefined) ? `${project.sourceRoot}/${projectType}` : options.path;

    const templateSource = addTplFiles(project.sourceRoot || '');

    // return updated tree
    try {
      return chain([
        mergeWith(templateSource)
      ]);
    } catch (e) {
      return host;
    }
  };

代码运行良好，除非文件已经在主应用程序项目中：

ERROR! src/assets/i18n/en.json already exists. ERROR! src/assets/i18n/it.json already exists. The Schematic workflow failed. See above.

如何捕获和管理此异常？

Answer 1

您有 2 个选择：

在原理图命令中使用 --force 选项，强制覆盖所有现有文件。

  ng g @custom/my-schematics:rule --force

检查文件是否已存在于您的原理图代码中，并在这种情况下应用特定行为。

const templateSource = apply(url('./files'), [
  forEach((fileEntry: FileEntry) => {
    if (tree.exists(fileEntry.path)) {
      console.log('File already exists, but it\'s ok');
      return null;
    }
    return fileEntry;
  })
]);

return chain([
  mergeWith(templateSource)
]);

原理图 - 管理模板文件复制错误

Schematics - Manage template files copy error

angular

angular-schematics