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46 lines
1.0 KiB
JavaScript
46 lines
1.0 KiB
JavaScript
"use strict";
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const measureTime = require("./astformer/util/measure-time");
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const transpile = require("./transpile");
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module.exports = function evaluate(nixCode) {
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let transpiled = transpile(nixCode);
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const api = {
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builtins: {},
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$$jsNix$memoize: function (func) {
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let isCalled = false;
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let storedResult;
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return function (arg) {
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if (isCalled === false) {
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storedResult = func(arg);
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isCalled = true;
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}
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return storedResult;
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};
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}
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};
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// TODO: Switch to Node `vm` API instead, and check whether there's a polyfill for it for non-Node environments, build a custom one if not
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const context = { module: {}, exports: {} };
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context.module.exports = exports;
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new Function("module", transpiled)(context.module);
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// Warm-up for hot VM performance testing
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// for (let i = 0; i < 10000; i++) {
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// context.module.exports(api);
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// }
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let result = measureTime(() => context.module.exports(api));
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if (process.env.DEBUG_NIX) {
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console.log("-- EVALUATION RESULT:");
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console.log(result);
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}
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return result;
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};
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