84 lines
13 KiB
JavaScript
84 lines
13 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const testcafe_hammerhead_1 = __importDefault(require("testcafe-hammerhead"));
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const asyncToGenerator_1 = __importDefault(require("@babel/runtime/helpers/asyncToGenerator"));
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const lodash_1 = require("lodash");
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const load_libs_1 = __importDefault(require("./babel/load-libs"));
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const runtime_1 = require("../errors/runtime");
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const types_1 = require("../errors/types");
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const format_babel_produced_code_1 = __importDefault(require("./babel/format-babel-produced-code"));
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const get_base_babel_options_1 = __importDefault(require("./babel/get-base-babel-options"));
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const ANONYMOUS_FN_RE = /^function\s*\*?\s*\(/;
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const ES6_OBJ_METHOD_NAME_RE = /^(\S+?)\s*\(/;
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const USE_STRICT_RE = /^('|")use strict('|");?/;
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const TRAILING_SEMICOLON_RE = /;\s*$/;
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const REGENERATOR_FOOTPRINTS_RE = /(_index\d+\.default|_regenerator\d+\.default|regeneratorRuntime)(\(\))?\.wrap\(function func\$\(_context\)/;
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const ASYNC_TO_GENERATOR_OUTPUT_CODE = (0, format_babel_produced_code_1.default)((0, asyncToGenerator_1.default)(lodash_1.noop).toString());
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const CLIENT_FUNCTION_BODY_WRAPPER = code => `const func = (${code});`;
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const CLIENT_FUNCTION_WRAPPER = ({ code, dependencies }) => `(function(){${dependencies} ${code} return func;})();`;
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let loadedBabelOptions = null;
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function getBabelOptions() {
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const { presetEnvForClientFunction, transformForOfAsArray } = (0, load_libs_1.default)();
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return Object.assign({}, get_base_babel_options_1.default, {
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presets: [{ plugins: [transformForOfAsArray] }, presetEnvForClientFunction],
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});
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}
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function ensureLoadedBabelOptions() {
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if (!loadedBabelOptions) {
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const { babel } = (0, load_libs_1.default)();
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const opts = getBabelOptions();
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loadedBabelOptions = babel.loadOptions(opts);
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}
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return loadedBabelOptions;
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}
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function downgradeES(fnCode) {
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const { babel } = (0, load_libs_1.default)();
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const opts = ensureLoadedBabelOptions();
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const compiled = babel.transform(fnCode, opts);
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return compiled.code
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.replace(USE_STRICT_RE, '')
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.trim();
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}
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function getDependenciesDefinition(dependencies) {
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return Object
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.keys(dependencies)
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.reduce((code, name) => {
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return code + `var ${name}=__dependencies$['${name}'];`;
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}, '');
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}
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function makeFnCodeSuitableForParsing(fnCode) {
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// NOTE: 'function() {}' -> '(function() {})'
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if (ANONYMOUS_FN_RE.test(fnCode))
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return `(${fnCode})`;
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// NOTE: 'myFn () {}' -> 'function myFn() {}'
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const match = fnCode.match(ES6_OBJ_METHOD_NAME_RE);
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if (match && match[1] !== 'function')
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return `function ${fnCode}`;
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return fnCode;
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}
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function containsAsyncToGeneratorOutputCode(code) {
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const formattedCode = (0, format_babel_produced_code_1.default)(code);
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return formattedCode.includes(ASYNC_TO_GENERATOR_OUTPUT_CODE);
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}
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function compileClientFunction(fnCode, dependencies, instantiationCallsiteName, compilationCallsiteName) {
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if (containsAsyncToGeneratorOutputCode(fnCode))
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throw new runtime_1.ClientFunctionAPIError(compilationCallsiteName, instantiationCallsiteName, types_1.RUNTIME_ERRORS.regeneratorInClientFunctionCode);
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fnCode = makeFnCodeSuitableForParsing(fnCode);
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fnCode = CLIENT_FUNCTION_BODY_WRAPPER(fnCode);
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// NOTE: we need to recompile ES6 code for the browser if we are on newer versions of Node.
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fnCode = downgradeES(fnCode);
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fnCode = testcafe_hammerhead_1.default.processScript(fnCode, false);
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// NOTE: check compiled code for regenerator injection
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if (REGENERATOR_FOOTPRINTS_RE.test(fnCode))
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throw new runtime_1.ClientFunctionAPIError(compilationCallsiteName, instantiationCallsiteName, types_1.RUNTIME_ERRORS.regeneratorInClientFunctionCode);
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if (!TRAILING_SEMICOLON_RE.test(fnCode))
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fnCode += ';';
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const dependenciesDefinition = dependencies ? getDependenciesDefinition(dependencies) : '';
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return CLIENT_FUNCTION_WRAPPER({ code: fnCode, dependencies: dependenciesDefinition });
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}
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exports.default = compileClientFunction;
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module.exports = exports.default;
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