`jest-docblock` is a package that can extract and parse a specially-formatted comment called a "docblock" at the top of a file. 

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Object.defineProperty(exports, '__esModule', {

exports.parseWithComments = parseWithComments;

  const data = _interopRequireDefault(require('detect-newline'));

  _detectNewline = function _detectNewline() {

  return obj && obj.__esModule ? obj : {default: obj};

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

const docblockRe = /^\s*(\/\*\*?(.|\r?\n)*?\*\/)/;

const lineCommentRe = /(^|\s+)\/\/([^\r\n]*)/g;

const multilineRe = /(?:^|\r?\n) *(@[^\r\n]*?) *\r?\n *(?![^@\r\n]*\/\/[^]*)([^@\r\n\s][^@\r\n]+?) *\r?\n/g;

const propertyRe = /(?:^|\r?\n) *@(\S+) *([^\r\n]*)/g;

const stringStartRe = /(\r?\n|^) *\* ?/g;

  const match = contents.match(docblockRe);

  return match ? match[0].trimLeft() : '';

  return match && match[0] ? contents.substring(match[0].length) : contents;

  return parseWithComments(docblock).pragmas;

  const line = (0, _detectNewline().default)(docblock) || _os().EOL;

    .replace(stringStartRe, '$1'); // Normalize multi-line directives

    docblock = docblock.replace(multilineRe, `${line}$1 $2${line}`);

  docblock = docblock.replace(ltrimNewlineRe, '').trimRight();

  while ((match = propertyRe.exec(docblock))) {

    const nextPragma = match[2].replace(lineCommentRe, '');

      typeof result[match[1]] === 'string' ||

      result[match[1]] = [].concat(result[match[1]], nextPragma);

function print({comments = '', pragmas = {}}) {

  const line = (0, _detectNewline().default)(comments) || _os().EOL;

    .map(key => printKeyValues(key, pragmas[key]))

    .reduce((arr, next) => arr.concat(next), [])

    .map(keyValue => start + ' ' + keyValue + line)

    if (keys.length === 1 && !Array.isArray(pragmas[keys[0]])) {

      return `${head} ${printKeyValues(keys[0], value)[0]}${tail}`;

      .map(textLine => `${start} ${textLine}`)

    (comments && keys.length ? start + line : '') +

    "url": "https://github.com/facebook/jest.git",

    "directory": "packages/jest-docblock"

  "gitHead": "634e5a54f46b2a62d1dc81a170562e6f4e55ad60"

  "gitHead": "800f2f803d01c8ae194d71b251e4965dd70e5bf2"

		@@ -12,6 +12,6 @@ 'use strict';

		function _detectNewline() {
		const data = _interopRequireDefault(require('detect-newline'));
		function _os() {
		const data = require('os');

		_detectNewline = function _detectNewline() {
		_os = function _os() {
		return data;
		@@ -23,6 +23,6 @@ };

		function _os() {
		const data = require('os');
		function _detectNewline() {
		const data = _interopRequireDefault(require('detect-newline'));

		_os = function _os() {
		_detectNewline = function _detectNewline() {
		return data;
		@@ -43,4 +43,2 @@ };
		* LICENSE file in the root directory of this source tree.
		*
		*
		*/
		@@ -47,0 +45,0 @@ const commentEndRe = /\*\/$/;

		{
		"name": "jest-docblock",
		"version": "24.0.0",
		"version": "24.2.0-alpha.0",
		"repository": {
		@@ -14,6 +14,12 @@ "type": "git",
		},
		"devDependencies": {
		"@types/detect-newline": "^2.1.0"
		},
		"engines": {
		"node": ">= 6"
		},
		"gitHead": "634e5a54f46b2a62d1dc81a170562e6f4e55ad60"
		"publishConfig": {
		"access": "public"
		},
		"gitHead": "800f2f803d01c8ae194d71b251e4965dd70e5bf2"
		}

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