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- 'use strict';
- exports.__esModule = true;
- const pattern = /(^|;)\s*(export|import)((\s+\w)|(\s*[{*=]))/m;
- /**
- * detect possible imports/exports without a full parse.
- *
- * A negative test means that a file is definitely _not_ a module.
- * A positive test means it _could_ be.
- *
- * Not perfect, just a fast way to disqualify large non-ES6 modules and
- * avoid a parse.
- * @type {RegExp}
- */
- exports.test = function isMaybeUnambiguousModule(content) {
- return pattern.test(content);
- };
- // future-/Babel-proof at the expense of being a little loose
- const unambiguousNodeType = /^(?:(?:Exp|Imp)ort.*Declaration|TSExportAssignment)$/;
- /**
- * Given an AST, return true if the AST unambiguously represents a module.
- * @param {Program node} ast
- * @return {Boolean}
- */
- exports.isModule = function isUnambiguousModule(ast) {
- return ast.body.some(node => unambiguousNodeType.test(node.type));
- };
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