# All files options.ts

93.33% Statements 14/15
0% Branches 0/1
100% Functions 3/3
92.86% Lines 13/14

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     export type LogLevel = "INFO" | "WARN" | "ERROR";

    export interface Options {
      readonly configFile: string;
      readonly extensions: ReadonlyArray<string>;
      readonly baseUrl: string | undefined;
      readonly silent: boolean;
      readonly logLevel: LogLevel;
      readonly logInfoToStdOut: boolean;
      readonly context: string | undefined;
      readonly colors: boolean;
      readonly mainFields: string[];
    }

    type ValidOptions = keyof Options;
    const validOptions: ReadonlyArray<ValidOptions> = [
      "configFile",
      "extensions",
      "baseUrl",
      "silent",
      "logLevel",
      "logInfoToStdOut",
      "context",
      "mainFields",
    ];

    /**
     * Takes raw options from the webpack config,
     * validates them and adds defaults for missing options
     */
    export function getOptions(rawOptions: {}): Options {
      validateOptions(rawOptions);

      const options = makeOptions(rawOptions);

      return options;
    }

    /**
     * Validate the supplied loader options.
     * At present this validates the option names only; in future we may look at validating the values too
     *
     * @param rawOptions
     */
    function validateOptions(rawOptions: {}): void {
      const loaderOptionKeys = Object.keys(rawOptions);
      for (let i = 0; i < loaderOptionKeys.length; i++) {
        const option = loaderOptionKeys[i];
        const isUnexpectedOption =
          (validOptions as ReadonlyArray<string>).indexOf(option) === -1;
        Iif (isUnexpectedOption) {
          throw new Error(`tsconfig-paths-webpack-plugin was supplied with an unexpected loader option: ${option}
    Please take a look at the options you are supplying; the following are valid options:
    ${validOptions.join(" / ")}
    `);
        }
      }
    }

    function makeOptions(rawOptions: Partial<Options>): Options {
      const options: Options = {
        ...({
          configFile: "tsconfig.json",
          extensions: [".ts", ".tsx"],
          baseUrl: undefined,
          silent: false,
          logLevel: "WARN",
          logInfoToStdOut: false,
          context: undefined,
          colors: true,
          mainFields: ["main"],
        } as Options),
        ...rawOptions,
      };

      const options2: Options = {
        ...options,
        logLevel: options.logLevel.toUpperCase() as LogLevel,
      };

      return options2;
    }