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