.

node_modules/jest-haste-map/build/lib/dependencyExtractor.js

@@ -0,0 +1,100 @@
+'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(
+      'require\\s*\\.\\s*(?:requireActual|requireMock)',
+      'jest\\s*\\.\\s*(?:requireActual|requireMock|genMockFromModule)'
+    ),
+    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;
+}