@netlify/content-engine
Version:
48 lines • 2.28 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveModuleExports = resolveModuleExports;
const dynamic_import_1 = require("../../lib/dynamic-import");
const reporter_1 = __importDefault(require("../reporter"));
const test_import_error_1 = require("../utils/test-import-error");
const resolve_js_file_path_1 = require("./resolve-js-file-path");
const prefer_default_1 = require("./prefer-default");
/**
* Given a path to a module, return an array of the module's exports.
*
* It can run in two modes:
* 1. `analysis` mode gets exports via static analysis by traversing the file's AST with babel
* 2. `import` mode gets exports by directly importing the module and accessing its properties
*
* At the time of writing, analysis mode is used for files that can be jsx (e.g. gatsby-browser, gatsby-ssr)
* and import mode is used for files that can be js or mjs.
*
* Returns [] for invalid paths and modules without exports.
*/
async function resolveModuleExports(modulePath, { rootDir = process.cwd() } = {}) {
try {
const moduleFilePath = await (0, resolve_js_file_path_1.resolveJSFilepath)({
rootDir,
filePath: modulePath,
});
if (!moduleFilePath) {
return [];
}
const filePath = (0, resolve_js_file_path_1.maybeAddFileProtocol)(moduleFilePath);
const rawImportedModule = await (0, dynamic_import_1.dynamicImport)(filePath);
// If the module is cjs, the properties we care about are nested under a top-level `default` property
const importedModule = (0, prefer_default_1.preferDefault)(rawImportedModule);
return Object.keys(importedModule).filter((exportName) => exportName !== `__esModule`);
}
catch (error) {
if (!(0, test_import_error_1.testImportError)(modulePath, error)) {
// if module exists, but requiring it cause errors,
// show the error to the user and terminate build
reporter_1.default.panic(`Error in "${modulePath}":`, error);
}
}
return [];
}
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