@aimee-blue/ab-service-kit/lib/setup/watchServerCode.js.map

Aimee Blue Service Template

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chokidar from 'chokidar';\nimport path, { dirname, resolve, join } from 'path';\nimport { Observable, of, from, defer, concat, timer, never, empty } from 'rxjs';\nimport {\n  mergeMap,\n  map,\n  expand,\n  filter,\n  find,\n  concatMap,\n  toArray,\n  mapTo,\n  catchError,\n  switchMapTo,\n} from 'rxjs/operators';\nimport {\n  IServiceConfig,\n  isTruthy,\n  isUnitTest,\n  isIntegrationTest,\n  defaultBasicLogger,\n} from '../shared';\nimport { pathExists } from 'fs-extra';\nimport { TeardownHandler } from '../shared/teardown';\nimport { clearModule } from '../shared/clearModule';\n\nif (process.env.NODE_ENV === 'production') {\n  throw new Error('This file should not be imported in production');\n}\n\nconst watchMultiple = (patterns: string[]) => {\n  if (isUnitTest() || isIntegrationTest()) {\n    return never();\n  }\n\n  const logger = defaultBasicLogger();\n\n  return new Observable<string>((subscriber) => {\n    const watcher = chokidar.watch(patterns, {\n      ignorePermissionErrors: true,\n    });\n\n    const onChange = (file: string) => {\n      logger.log('Change detected for', file);\n      subscriber.next(file);\n    };\n\n    const onError = (err: Error) => {\n      subscriber.error(err);\n    };\n\n    const onClose = () => {\n      subscriber.complete();\n    };\n\n    watcher.on('change', onChange).on('error', onError).on('close', onClose);\n\n    return () => {\n      watcher.close().catch((err) => {\n        logger.log('Couldnt close file watcher', err);\n      });\n    };\n  });\n};\n\nlet teardownOldServer: TeardownHandler = async () => {\n  const logger = defaultBasicLogger();\n\n  logger.log('Dummy teardown was called ... odd');\n  return;\n};\n\nconst moduleInfo = (mod: NodeModule) => ({\n  filePath: path.relative('./', mod.filename),\n  mod,\n});\n\nfunction mainModule() {\n  if (!require.main) {\n    throw new Error('No require.main defined');\n  }\n  return require.main;\n}\n\nfunction allChildModules(startFrom: NodeModule = mainModule()) {\n  return of(moduleInfo(startFrom)).pipe((stream) => {\n    const set = new Set();\n\n    // sometimes modules circularly reference each other :(\n    const uniqueModules = (arr: NodeModule[]) => {\n      const items = arr.filter((item) => !set.has(item));\n      items.forEach(set.add.bind(set));\n      return items;\n    };\n\n    return stream.pipe(\n      expand((data) =>\n        from(uniqueModules(data.mod.children)).pipe(\n          map(moduleInfo),\n          filter((pair) => !pair.filePath.includes('node_modules'))\n        )\n      )\n    );\n  });\n}\n\nfunction findModule(\n  fullPathToJs: string,\n  startFrom: NodeModule = mainModule()\n) {\n  const compareTo = resolve(path.normalize(fullPathToJs));\n\n  return concat(\n    allChildModules(startFrom),\n    from(\n      Object.entries(require.cache as { [key: string]: NodeModule | undefined })\n        .filter((entry) => !entry[0].includes('node_modules'))\n        .map((entry) => entry[1])\n        .filter(isTruthy)\n        .map((module) => moduleInfo(module))\n    )\n  ).pipe(\n    //\n    find((result) => {\n      const resolvedPath = resolve(path.normalize(result.filePath));\n      return resolvedPath === compareTo;\n    })\n  );\n}\n\nfunction allParentModules(module: NodeModule) {\n  return defer(() => {\n    return of(module.parent).pipe(\n      filter(isTruthy),\n      expand((next) => (next.parent ? of(next.parent) : empty())),\n      map((mod) => moduleInfo(mod))\n    );\n  });\n}\n\ntype ServiceSetupFunc = (config: IServiceConfig) => Promise<TeardownHandler>;\n\nfunction requireSetupModule(moduleId: string): IServiceConfig {\n  // eslint-disable-next-line\n  const result = require(moduleId) as\n    | IServiceConfig\n    | {\n        default: IServiceConfig;\n      };\n  if (typeof result !== 'object') {\n    throw new Error('Resolved to a non-object');\n  }\n\n  if ('default' in result) {\n    return result.default;\n  }\n\n  return result;\n}\n\nexport async function serviceSetupInWatchMode(\n  setupFilePath: string,\n  setup: ServiceSetupFunc\n): Promise<TeardownHandler> {\n  const initialConfig = requireSetupModule(setupFilePath);\n\n  const logger = defaultBasicLogger();\n\n  teardownOldServer = await setup(initialConfig);\n\n  // please note that changes to this pattern will probably need changes to `watchServerCode` function\n  // to detect .ts file locations correctly\n  const WATCH_PATTERNS = initialConfig.watchPatterns || [\n    'lib/**/*.js',\n    '.env',\n    '.env.local',\n  ];\n\n  const subscription = defer(() => {\n    logger.log(`🔍  Watching for file changes in ${WATCH_PATTERNS.join(', ')}`);\n    return watchMultiple(WATCH_PATTERNS);\n  })\n    .pipe(\n      mergeMap((filePath) =>\n        from(\n          pathExists(join(process.cwd(), filePath))\n            .catch(() => false)\n            .then((exists) => ({\n              exists,\n              filePath,\n              resolved: join(process.cwd(), filePath),\n            }))\n        )\n      ),\n      filter((pair) => {\n        if (!pair.exists) {\n          logger.log(\n            `Cannot resolve changes to ${pair.filePath} (tried ${pair.resolved}), ignoring`\n          );\n        }\n\n        return pair.exists;\n      }),\n\n      mergeMap((fileInfo) =>\n        findModule(fileInfo.resolved).pipe(\n          filter(isTruthy),\n          concatMap((mod) => concat(of(mod), allParentModules(mod.mod))),\n          toArray()\n        )\n      ),\n\n      filter((mods) => mods.length > 0),\n\n      concatMap((mods) =>\n        from(teardownOldServer('watch-mode')).pipe(mapTo(mods))\n      ),\n\n      concatMap((mods) => {\n        for (const mod of mods) {\n          if (mod.mod.id === '.') {\n            // we do not reload the main module\n            continue;\n          }\n          if (dirname(mod.mod.id) === __dirname) {\n            continue;\n          }\n\n          clearModule(mod.mod.id);\n        }\n\n        if (!mods.find((item) => item.filePath === setupFilePath)) {\n          clearModule(setupFilePath);\n        }\n\n        return defer(() =>\n          from(\n            setup(requireSetupModule(setupFilePath)).then((teardown) => {\n              teardownOldServer = teardown;\n              return Promise.resolve();\n            })\n          )\n        );\n      }),\n\n      catchError((err, self) => {\n        logger.log(\n          '💥  Watching error, will wait for 2sec before restart ... ',\n          err\n        );\n        return timer(2000).pipe(switchMapTo(self));\n      })\n    )\n    .subscribe(\n      () => {\n        return;\n      },\n      (err) => logger.log('💥  Watching error', err),\n      () => logger.log('Watching stopped')\n    );\n\n  return async (mode) => {\n    subscription.unsubscribe();\n\n    await teardownOldServer(mode);\n  };\n}\n"],"file":"watchServerCode.js"}