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