jsdoc/packages/jsdoc-doclet/lib/package.js

/*
  Copyright 2011 the JSDoc Authors.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      https://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/
import { log } from '@jsdoc/util';
import stripBom from 'strip-bom';

/**
 * Provides access to information about a JavaScript package.
 *
 * @see https://www.npmjs.org/doc/files/package.json.html
 */

// Collect all of the license information from a `package.json` file.
function getLicenses(packageInfo) {
  const licenses = packageInfo.licenses ? packageInfo.licenses.slice() : [];

  if (packageInfo.license) {
    licenses.push({ type: packageInfo.license });
  }

  return licenses;
}

/**
 * Information about where to report bugs in the package.
 *
 * @typedef {Object} module:@jsdoc/doclet.Package~BugInfo
 * @property {string} email - The email address for reporting bugs.
 * @property {string} url - The URL for reporting bugs.
 */

/**
 * Information about a package's software license.
 *
 * @typedef {Object} module:@jsdoc/doclet.Package~LicenseInfo
 * @property {string} type - An identifier for the type of license.
 * @property {string} url - The URL for the complete text of the license.
 */

/**
 * Information about a package author or contributor.
 *
 * @typedef {Object} module:@jsdoc/doclet.Package~PersonInfo
 * @property {string} name - The person's full name.
 * @property {string} email - The person's email address.
 * @property {string} url - The URL of the person's website.
 */

/**
 * Information about a package's version-control repository.
 *
 * @typedef {Object} module:@jsdoc/doclet.Package~RepositoryInfo
 * @property {string} type - The type of version-control system that the repository uses (for
 * example, `git` or `svn`).
 * @property {string} url - The URL for the repository.
 */

/**
 * Information about a JavaScript package. JSDoc can extract package information from
 * `package.json` files that follow the
 * [npm specification](https://www.npmjs.org/doc/files/package.json.html).
 *
 * **Note**: JSDoc does not validate or normalize the contents of `package.json` files. If your
 * `package.json` file does not follow the npm specification, some properties of the `Package`
 * object may not use the format documented here.
 */
export class Package {
  /**
   * @param {string} json - The contents of the `package.json` file.
   */
  constructor(json) {
    let packageInfo;

    /**
     * The string identifier that is shared by all `Package` objects.
     *
     * @readonly
     * @default
     * @type {string}
     */
    this.kind = 'package';

    try {
      packageInfo = JSON.parse(json ? stripBom(json) : '{}');
    } catch (e) {
      log.error(`Unable to parse the package file: ${e.message}`);
      packageInfo = {};
    }

    if (packageInfo.name) {
      /**
       * The package name.
       *
       * @type {string}
       */
      this.name = packageInfo.name;
    }

    /**
     * The unique longname for this `Package` object.
     *
     * @type {string}
     */
    this.longname = `${this.kind}:${this.name}`;

    if (packageInfo.author) {
      /**
       * The author of this package. Contains either a
       * {@link module:@jsdoc/doclet.Package~PersonInfo PersonInfo} object or a string with
       * information about the author.
       *
       * @type {(module:@jsdoc/doclet.Package~PersonInfo|string)}
       */
      this.author = packageInfo.author;
    }

    if (packageInfo.bugs) {
      /**
       * Information about where to report bugs in the project. May contain a URL, a string, or an
       * object with more detailed information.
       *
       * @type {(string|module:@jsdoc/doclet.Package~BugInfo)}
       */
      this.bugs = packageInfo.bugs;
    }

    if (packageInfo.contributors) {
      /**
       * The contributors to this package.
       *
       * @type {Array.<(module:@jsdoc/doclet.Package~PersonInfo|string)>}
       */
      this.contributors = packageInfo.contributors;
    }

    if (packageInfo.dependencies) {
      /**
       * The dependencies for this package.
       *
       * @type {Object}
       */
      this.dependencies = packageInfo.dependencies;
    }

    if (packageInfo.description) {
      /**
       * A brief description of the package.
       *
       * @type {string}
       */
      this.description = packageInfo.description;
    }

    if (packageInfo.devDependencies) {
      /**
       * The development dependencies for this package.
       *
       * @type {Object}
       */
      this.devDependencies = packageInfo.devDependencies;
    }

    if (packageInfo.engines) {
      /**
       * The JavaScript engines that this package supports. Each key is a string that identifies the
       * engine (for example, `node`). Each value is a
       * [semver](https://www.npmjs.org/doc/misc/semver.html)-compliant version number for the
       * engine.
       *
       * @type {Object}
       */
      this.engines = packageInfo.engines;
    }

    /**
     * The source files associated with the package.
     *
     * New `Package` objects always contain an empty array, regardless of whether the `package.json`
     * file includes a `files` property.
     *
     * After JSDoc parses your input files, it sets this property to a list of paths to your input
     * files.
     *
     * @type {Array.<string>}
     */
    this.files = [];

    if (packageInfo.homepage) {
      /**
       * The URL for the package's homepage.
       *
       * @type {string}
       */
      this.homepage = packageInfo.homepage;
    }

    if (packageInfo.keywords) {
      /**
       * Keywords to help users find the package.
       *
       * @type {Array.<string>}
       */
      this.keywords = packageInfo.keywords;
    }

    if (packageInfo.license || packageInfo.licenses) {
      /**
       * The licenses used by this package. Combines information from the `package.json` file's
       * `license` property and the deprecated `licenses` property.
       *
       * @type {Array.<module:@jsdoc/doclet.Package~LicenseInfo>}
       */
      this.licenses = getLicenses(packageInfo);
    }

    if (packageInfo.main) {
      /**
       * The module ID that provides the primary entry point to the package. For example, if your
       * package is a CommonJS module, and the value of this property is `foo`, users should be able
       * to load your module with `require('foo')`.
       *
       * @type {string}
       */
      this.main = packageInfo.main;
    }

    if (packageInfo.repository) {
      /**
       * The version-control repository for the package.
       *
       * @type {module:@jsdoc/doclet.Package~RepositoryInfo}
       */
      this.repository = packageInfo.repository;
    }

    if (packageInfo.version) {
      /**
       * The [semver](https://www.npmjs.org/doc/misc/semver.html)-compliant version number of the
       * package.
       *
       * @type {string}
       */
      this.version = packageInfo.version;
    }
  }
}