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Lazy-initialize external helper template.

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This commit is contained in:
Logan Smyth 2017-12-01 17:11:38 -08:00
parent dffcef785a
commit 600106b9cb
1 changed files with 16 additions and 13 deletions
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29
packages/babel-core/src/tools/build-external-helpers.js
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@ -3,19 +3,22 @@ import generator from "@babel/generator";
import template from "@babel/template"; import template from "@babel/template";
import * as t from "@babel/types"; import * as t from "@babel/types";
const buildUmdWrapper = template(` // Wrapped to avoid wasting time parsing this when almost no-one uses
(function (root, factory) { // build-external-helpers.
if (typeof define === "function" && define.amd) { const buildUmdWrapper = replacements =>
define(AMD_ARGUMENTS, factory); template`
} else if (typeof exports === "object") { (function (root, factory) {
factory(COMMON_ARGUMENTS); if (typeof define === "function" && define.amd) {
} else { define(AMD_ARGUMENTS, factory);
factory(BROWSER_ARGUMENTS); } else if (typeof exports === "object") {
} factory(COMMON_ARGUMENTS);
})(UMD_ROOT, function (FACTORY_PARAMETERS) { } else {
FACTORY_BODY factory(BROWSER_ARGUMENTS);
}); }
`); })(UMD_ROOT, function (FACTORY_PARAMETERS) {
FACTORY_BODY
});
`(replacements);
function buildGlobal(whitelist) { function buildGlobal(whitelist) {
const namespace = t.identifier("babelHelpers"); const namespace = t.identifier("babelHelpers");