100 lines
2.3 KiB
JavaScript
100 lines
2.3 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.extract = extract;
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var _isRegExpSupported = _interopRequireDefault(require('./isRegExpSupported'));
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function _interopRequireDefault(obj) {
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return obj && obj.__esModule ? obj : {default: obj};
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}
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// Negative look behind is only supported in Node 9+
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const NOT_A_DOT = (0, _isRegExpSupported.default)('(?<!\\.\\s*)')
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? '(?<!\\.\\s*)'
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: '(?:^|[^.]\\s*)';
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const CAPTURE_STRING_LITERAL = pos => `([\`'"])([^'"\`]*?)(?:\\${pos})`;
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const WORD_SEPARATOR = '\\b';
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const LEFT_PARENTHESIS = '\\(';
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const RIGHT_PARENTHESIS = '\\)';
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const WHITESPACE = '\\s*';
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const OPTIONAL_COMMA = '(:?,\\s*)?';
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function createRegExp(parts, flags) {
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return new RegExp(parts.join(''), flags);
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}
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function alternatives(...parts) {
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return `(?:${parts.join('|')})`;
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}
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function functionCallStart(...names) {
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return [
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NOT_A_DOT,
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WORD_SEPARATOR,
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alternatives(...names),
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WHITESPACE,
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LEFT_PARENTHESIS,
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WHITESPACE
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];
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}
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const BLOCK_COMMENT_RE = /\/\*[^]*?\*\//g;
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const LINE_COMMENT_RE = /\/\/.*/g;
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const REQUIRE_OR_DYNAMIC_IMPORT_RE = createRegExp(
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[
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...functionCallStart('require', 'import'),
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CAPTURE_STRING_LITERAL(1),
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WHITESPACE,
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OPTIONAL_COMMA,
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RIGHT_PARENTHESIS
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],
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'g'
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);
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const IMPORT_OR_EXPORT_RE = createRegExp(
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[
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'\\b(?:import|export)\\s+(?!type(?:of)?\\s+)(?:[^\'"]+\\s+from\\s+)?',
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CAPTURE_STRING_LITERAL(1)
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],
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'g'
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);
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const JEST_EXTENSIONS_RE = createRegExp(
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[
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...functionCallStart(
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'jest\\s*\\.\\s*(?:requireActual|requireMock|genMockFromModule|createMockFromModule)'
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),
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CAPTURE_STRING_LITERAL(1),
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WHITESPACE,
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OPTIONAL_COMMA,
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RIGHT_PARENTHESIS
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],
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'g'
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);
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function extract(code) {
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const dependencies = new Set();
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const addDependency = (match, _, dep) => {
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dependencies.add(dep);
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return match;
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};
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code
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.replace(BLOCK_COMMENT_RE, '')
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.replace(LINE_COMMENT_RE, '')
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.replace(IMPORT_OR_EXPORT_RE, addDependency)
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.replace(REQUIRE_OR_DYNAMIC_IMPORT_RE, addDependency)
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.replace(JEST_EXTENSIONS_RE, addDependency);
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return dependencies;
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}
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