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* as fs from \"fs\"\nimport * as path from \"path\"\nimport mkdirp from \"mkdirp\"\nimport { TypeORMError } from \"../error\"\nimport { DataSource } from \"../data-source\"\nimport { InstanceChecker } from \"../util/InstanceChecker\"\nimport { importOrRequireFile } from \"../util/ImportUtils\"\n\n/**\n * Command line utils functions.\n */\nexport class CommandUtils {\n static async loadDataSource(\n dataSourceFilePath: string,\n ): Promise<DataSource> {\n let dataSourceFileExports\n try {\n ;[dataSourceFileExports] = await importOrRequireFile(\n dataSourceFilePath,\n )\n } catch (err) {\n throw new Error(\n `Unable to open file: \"${dataSourceFilePath}\". ${err.message}`,\n )\n }\n\n if (\n !dataSourceFileExports ||\n typeof dataSourceFileExports !== \"object\"\n ) {\n throw new Error(\n `Given data source file must contain export of a DataSource instance`,\n )\n }\n\n if (InstanceChecker.isDataSource(dataSourceFileExports)) {\n return dataSourceFileExports\n }\n\n const dataSourceExports = []\n for (const fileExportKey in dataSourceFileExports) {\n const fileExport = dataSourceFileExports[fileExportKey]\n // It is necessary to await here in case of the exported async value (Promise<DataSource>).\n // e.g. the DataSource is instantiated with an async factory in the source file\n // It is safe to await regardless of the export being async or not due to `awaits` definition:\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await#return_value\n const awaitedFileExport = await fileExport\n if (InstanceChecker.isDataSource(awaitedFileExport)) {\n dataSourceExports.push(awaitedFileExport)\n }\n }\n\n if (dataSourceExports.length === 0) {\n throw new Error(\n `Given data source file must contain export of a DataSource instance`,\n )\n }\n if (dataSourceExports.length > 1) {\n throw new Error(\n `Given data source file must contain only one export of DataSource instance`,\n )\n }\n return dataSourceExports[0]\n }\n\n /**\n * Creates directories recursively.\n */\n static createDirectories(directory: string) {\n return mkdirp(directory)\n }\n\n /**\n * Creates a file with the given content in the given path.\n */\n static async createFile(\n filePath: string,\n content: string,\n override: boolean = true,\n ): Promise<void> {\n await CommandUtils.createDirectories(path.dirname(filePath))\n return new Promise<void>((ok, fail) => {\n if (override === false && fs.existsSync(filePath)) return ok()\n\n fs.writeFile(filePath, content, (err) => (err ? fail(err) : ok()))\n })\n }\n\n /**\n * Reads everything from a given file and returns its content as a string.\n */\n static async readFile(filePath: string): Promise<string> {\n return new Promise<string>((ok, fail) => {\n fs.readFile(filePath, (err, data) =>\n err ? fail(err) : ok(data.toString()),\n )\n })\n }\n\n static async fileExists(filePath: string) {\n return fs.existsSync(filePath)\n }\n\n /**\n * Gets migration timestamp and validates argument (if sent)\n */\n static getTimestamp(timestampOptionArgument: any): number {\n if (\n timestampOptionArgument &&\n (isNaN(timestampOptionArgument) || timestampOptionArgument < 0)\n ) {\n throw new TypeORMError(\n `timestamp option should be a non-negative number. received: ${timestampOptionArgument}`,\n )\n }\n return timestampOptionArgument\n ? new Date(Number(timestampOptionArgument)).getTime()\n : Date.now()\n }\n}\n"],"sourceRoot":".."}