private configureTypeScript()

in src/compiler.ts [179:226]
35 lines of code
4 McCabe index (conditional complexity)

  private configureTypeScript(): TypeScriptConfig {
    if (this.userProvidedTypeScriptConfig) {
      const config = this.readTypeScriptConfig();

      // emit a warning if validation is disabled
      const rules = this.options.validateTypeScriptConfig ?? TypeScriptConfigValidationRuleSet.NONE;
      if (rules === TypeScriptConfigValidationRuleSet.NONE) {
        utils.logDiagnostic(
          JsiiDiagnostic.JSII_4009_DISABLED_TSCONFIG_VALIDATION.create(undefined, this.configPath),
          this.projectRoot,
        );
      }

      // validate the user provided config
      if (rules !== TypeScriptConfigValidationRuleSet.NONE) {
        const configName = path.relative(this.projectRoot, this.configPath);
        try {
          const validator = new TypeScriptConfigValidator(rules);
          validator.validate({
            ...config,
            // convert the internal format to the user format which is what the validator operates on
            compilerOptions: convertForJson(config.compilerOptions),
          });
        } catch (error: unknown) {
          if (error instanceof ValidationError) {
            utils.logDiagnostic(
              JsiiDiagnostic.JSII_4000_FAILED_TSCONFIG_VALIDATION.create(
                undefined,
                configName,
                rules,
                error.violations,
              ),
              this.projectRoot,
            );
          }

          throw new utils.JsiiError(
            `Failed validation of tsconfig "compilerOptions" in "${configName}" against rule set "${rules}"!`,
          );
        }
      }

      return config;
    }

    // generated config if none is provided by the user
    return this.buildTypeScriptConfig();
  }