nx/packages/node/src/generators/application/application.ts

import {
  addDependenciesToPackageJson,
  addProjectConfiguration,
  ensurePackage,
  formatFiles,
  generateFiles,
  GeneratorCallback,
  joinPathFragments,
  logger,
  names,
  offsetFromRoot,
  ProjectConfiguration,
  readProjectConfiguration,
  runTasksInSerial,
  TargetConfiguration,
  toJS,
  Tree,
  updateJson,
  updateProjectConfiguration,
  updateTsConfigsToJs,
} from '@nx/devkit';
import { determineProjectNameAndRootOptions } from '@nx/devkit/src/generators/project-name-and-root-utils';
import { configurationGenerator } from '@nx/jest';
import { getRelativePathToRootTsConfig, tsConfigBaseOptions } from '@nx/js';
import { esbuildVersion } from '@nx/js/src/utils/versions';
import { Linter, lintProjectGenerator } from '@nx/eslint';
import { join } from 'path';
import {
  expressTypingsVersion,
  expressVersion,
  fastifyAutoloadVersion,
  fastifyPluginVersion,
  fastifySensibleVersion,
  fastifyVersion,
  koaTypingsVersion,
  koaVersion,
  nxVersion,
} from '../../utils/versions';
import { e2eProjectGenerator } from '../e2e-project/e2e-project';
import { initGenerator } from '../init/init';
import { setupDockerGenerator } from '../setup-docker/setup-docker';
import { Schema } from './schema';

export interface NormalizedSchema extends Schema {
  appProjectRoot: string;
  parsedTags: string[];
}

function getWebpackBuildConfig(
  project: ProjectConfiguration,
  options: NormalizedSchema
): TargetConfiguration {
  return {
    executor: `@nx/webpack:webpack`,
    outputs: ['{options.outputPath}'],
    defaultConfiguration: 'production',
    options: {
      target: 'node',
      compiler: 'tsc',
      outputPath: joinPathFragments(
        'dist',
        options.rootProject ? options.name : options.appProjectRoot
      ),
      main: joinPathFragments(
        project.sourceRoot,
        'main' + (options.js ? '.js' : '.ts')
      ),
      tsConfig: joinPathFragments(options.appProjectRoot, 'tsconfig.app.json'),
      assets: [joinPathFragments(project.sourceRoot, 'assets')],
      isolatedConfig: true,
      webpackConfig: joinPathFragments(
        options.appProjectRoot,
        'webpack.config.js'
      ),
    },
    configurations: {
      development: {},
      production: {
        ...(options.docker && { generateLockfile: true }),
      },
    },
  };
}

function getEsBuildConfig(
  project: ProjectConfiguration,
  options: NormalizedSchema
): TargetConfiguration {
  return {
    executor: '@nx/esbuild:esbuild',
    outputs: ['{options.outputPath}'],
    defaultConfiguration: 'production',
    options: {
      platform: 'node',
      outputPath: joinPathFragments(
        'dist',
        options.rootProject ? options.name : options.appProjectRoot
      ),
      // Use CJS for Node apps for widest compatibility.
      format: ['cjs'],
      bundle: false,
      main: joinPathFragments(
        project.sourceRoot,
        'main' + (options.js ? '.js' : '.ts')
      ),
      tsConfig: joinPathFragments(options.appProjectRoot, 'tsconfig.app.json'),
      assets: [joinPathFragments(project.sourceRoot, 'assets')],
      generatePackageJson: true,
      esbuildOptions: {
        sourcemap: true,
        // Generate CJS files as .js so imports can be './foo' rather than './foo.cjs'.
        outExtension: { '.js': '.js' },
      },
    },
    configurations: {
      development: {},
      production: {
        ...(options.docker && { generateLockfile: true }),
        esbuildOptions: {
          sourcemap: false,
          // Generate CJS files as .js so imports can be './foo' rather than './foo.cjs'.
          outExtension: { '.js': '.js' },
        },
      },
    },
  };
}

function getServeConfig(options: NormalizedSchema): TargetConfiguration {
  return {
    executor: '@nx/js:node',
    defaultConfiguration: 'development',
    options: {
      buildTarget: `${options.name}:build`,
    },
    configurations: {
      development: {
        buildTarget: `${options.name}:build:development`,
      },
      production: {
        buildTarget: `${options.name}:build:production`,
      },
    },
  };
}

function addProject(tree: Tree, options: NormalizedSchema) {
  const project: ProjectConfiguration = {
    root: options.appProjectRoot,
    sourceRoot: joinPathFragments(options.appProjectRoot, 'src'),
    projectType: 'application',
    targets: {},
    tags: options.parsedTags,
  };

  project.targets.build =
    options.bundler === 'esbuild'
      ? getEsBuildConfig(project, options)
      : getWebpackBuildConfig(project, options);
  project.targets.serve = getServeConfig(options);

  addProjectConfiguration(
    tree,
    options.name,
    project,
    options.standaloneConfig
  );
}

function addAppFiles(tree: Tree, options: NormalizedSchema) {
  generateFiles(
    tree,
    join(__dirname, './files/common'),
    options.appProjectRoot,
    {
      ...options,
      tmpl: '',
      name: options.name,
      root: options.appProjectRoot,
      offset: offsetFromRoot(options.appProjectRoot),
      rootTsConfigPath: getRelativePathToRootTsConfig(
        tree,
        options.appProjectRoot
      ),
    }
  );

  if (options.bundler !== 'webpack') {
    tree.delete(joinPathFragments(options.appProjectRoot, 'webpack.config.js'));
  }

  if (options.framework && options.framework !== 'none') {
    generateFiles(
      tree,
      join(__dirname, `./files/${options.framework}`),
      options.appProjectRoot,
      {
        ...options,
        tmpl: '',
        name: options.name,
        root: options.appProjectRoot,
        offset: offsetFromRoot(options.appProjectRoot),
        rootTsConfigPath: getRelativePathToRootTsConfig(
          tree,
          options.appProjectRoot
        ),
      }
    );
  }
  if (options.js) {
    toJS(tree);
  }
  if (options.pascalCaseFiles) {
    logger.warn('NOTE: --pascalCaseFiles is a noop');
  }
}

function addProxy(tree: Tree, options: NormalizedSchema) {
  const projectConfig = readProjectConfiguration(tree, options.frontendProject);
  if (projectConfig.targets && projectConfig.targets.serve) {
    const pathToProxyFile = `${projectConfig.root}/proxy.conf.json`;
    projectConfig.targets.serve.options = {
      ...projectConfig.targets.serve.options,
      proxyConfig: pathToProxyFile,
    };

    if (!tree.exists(pathToProxyFile)) {
      tree.write(
        pathToProxyFile,
        JSON.stringify(
          {
            '/api': {
              target: `http://localhost:${options.port}`,
              secure: false,
            },
          },
          null,
          2
        )
      );
    } else {
      //add new entry to existing config
      const proxyFileContent = tree.read(pathToProxyFile).toString();

      const proxyModified = {
        ...JSON.parse(proxyFileContent),
        [`/${options.name}-api`]: {
          target: `http://localhost:${options.port}`,
          secure: false,
        },
      };

      tree.write(pathToProxyFile, JSON.stringify(proxyModified, null, 2));
    }

    updateProjectConfiguration(tree, options.frontendProject, projectConfig);
  }
}

export async function addLintingToApplication(
  tree: Tree,
  options: NormalizedSchema
): Promise<GeneratorCallback> {
  const lintTask = await lintProjectGenerator(tree, {
    linter: options.linter,
    project: options.name,
    tsConfigPaths: [
      joinPathFragments(options.appProjectRoot, 'tsconfig.app.json'),
    ],
    unitTestRunner: options.unitTestRunner,
    skipFormat: true,
    setParserOptionsProject: options.setParserOptionsProject,
    rootProject: options.rootProject,
  });

  return lintTask;
}

function addProjectDependencies(
  tree: Tree,
  options: NormalizedSchema
): GeneratorCallback {
  const bundlers = {
    webpack: {
      '@nx/webpack': nxVersion,
    },
    esbuild: {
      '@nx/esbuild': nxVersion,
      esbuild: esbuildVersion,
    },
  };

  const frameworkDependencies = {
    express: {
      express: expressVersion,
    },
    koa: {
      koa: koaVersion,
    },
    fastify: {
      fastify: fastifyVersion,
      'fastify-plugin': fastifyPluginVersion,
      '@fastify/autoload': fastifyAutoloadVersion,
      '@fastify/sensible': fastifySensibleVersion,
    },
  };
  const frameworkDevDependencies = {
    express: {
      '@types/express': expressTypingsVersion,
    },
    koa: {
      '@types/koa': koaTypingsVersion,
    },
    fastify: {},
  };
  return addDependenciesToPackageJson(
    tree,
    {
      ...frameworkDependencies[options.framework],
    },
    {
      ...frameworkDevDependencies[options.framework],
      ...bundlers[options.bundler],
    }
  );
}

function updateTsConfigOptions(tree: Tree, options: NormalizedSchema) {
  updateJson(tree, `${options.appProjectRoot}/tsconfig.json`, (json) => {
    if (options.rootProject) {
      return {
        compilerOptions: {
          ...tsConfigBaseOptions,
          ...json.compilerOptions,
          esModuleInterop: true,
        },
        ...json,
        extends: undefined,
        exclude: ['node_modules', 'tmp'],
      };
    } else {
      return {
        ...json,
        compilerOptions: {
          ...json.compilerOptions,
          esModuleInterop: true,
        },
      };
    }
  });
}

export async function applicationGenerator(tree: Tree, schema: Schema) {
  return await applicationGeneratorInternal(tree, {
    projectNameAndRootFormat: 'derived',
    ...schema,
  });
}

export async function applicationGeneratorInternal(tree: Tree, schema: Schema) {
  const options = await normalizeOptions(tree, schema);
  const tasks: GeneratorCallback[] = [];

  if (options.framework === 'nest') {
    const { applicationGenerator } = ensurePackage('@nx/nest', nxVersion);
    return await applicationGenerator(tree, { ...options, skipFormat: true });
  }

  const initTask = await initGenerator(tree, {
    ...schema,
    skipFormat: true,
  });
  tasks.push(initTask);

  const installTask = addProjectDependencies(tree, options);
  tasks.push(installTask);
  addAppFiles(tree, options);
  addProject(tree, options);

  updateTsConfigOptions(tree, options);

  if (options.linter === Linter.EsLint) {
    const lintTask = await addLintingToApplication(tree, options);
    tasks.push(lintTask);
  }

  if (options.unitTestRunner === 'jest') {
    const jestTask = await configurationGenerator(tree, {
      ...options,
      project: options.name,
      setupFile: 'none',
      skipSerializers: true,
      supportTsx: options.js,
      testEnvironment: 'node',
      compiler: options.swcJest ? 'swc' : 'tsc',
      skipFormat: true,
    });
    tasks.push(jestTask);
  } else {
    // No need for default spec file if unit testing is not setup.
    tree.delete(
      joinPathFragments(options.appProjectRoot, 'src/app/app.spec.ts')
    );
  }

  if (options.e2eTestRunner === 'jest') {
    const e2eTask = await e2eProjectGenerator(tree, {
      ...options,
      projectType: options.framework === 'none' ? 'cli' : 'server',
      name: options.rootProject ? 'e2e' : `${options.name}-e2e`,
      directory: options.rootProject ? 'e2e' : `${options.appProjectRoot}-e2e`,
      projectNameAndRootFormat: 'as-provided',
      project: options.name,
      port: options.port,
      isNest: options.isNest,
      skipFormat: true,
    });
    tasks.push(e2eTask);
  }

  if (options.js) {
    updateTsConfigsToJs(tree, { projectRoot: options.appProjectRoot });
  }

  if (options.frontendProject) {
    addProxy(tree, options);
  }

  if (options.docker) {
    const dockerTask = await setupDockerGenerator(tree, {
      ...options,
      project: options.name,
      skipFormat: true,
    });

    tasks.push(dockerTask);
  }

  if (!options.skipFormat) {
    await formatFiles(tree);
  }

  return runTasksInSerial(...tasks);
}

async function normalizeOptions(
  host: Tree,
  options: Schema
): Promise<NormalizedSchema> {
  const {
    projectName: appProjectName,
    projectRoot: appProjectRoot,
    projectNameAndRootFormat,
  } = await determineProjectNameAndRootOptions(host, {
    name: options.name,
    projectType: 'application',
    directory: options.directory,
    projectNameAndRootFormat: options.projectNameAndRootFormat,
    rootProject: options.rootProject,
    callingGenerator: '@nx/node:application',
  });
  options.rootProject = appProjectRoot === '.';
  options.projectNameAndRootFormat = projectNameAndRootFormat;

  options.bundler = options.bundler ?? 'esbuild';
  options.e2eTestRunner = options.e2eTestRunner ?? 'jest';

  const parsedTags = options.tags
    ? options.tags.split(',').map((s) => s.trim())
    : [];

  return {
    ...options,
    name: appProjectName,
    frontendProject: options.frontendProject
      ? names(options.frontendProject).fileName
      : undefined,
    appProjectRoot,
    parsedTags,
    linter: options.linter ?? Linter.EsLint,
    unitTestRunner: options.unitTestRunner ?? 'jest',
    rootProject: options.rootProject ?? false,
    port: options.port ?? 3000,
  };
}

export default applicationGenerator;