213 lines
8.2 KiB
JavaScript
213 lines
8.2 KiB
JavaScript
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"use strict";
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// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
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// See LICENSE in the project root for license information.
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.PackageName = exports.PackageNameParser = void 0;
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/**
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* A configurable parser for validating and manipulating NPM package names such as `my-package` or `@scope/my-package`.
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*
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* @remarks
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* If you do not need to customize the parser configuration, it is recommended to use {@link PackageName}
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* which exposes these operations as a simple static class.
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*
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* @public
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*/
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class PackageNameParser {
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constructor(options = {}) {
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this._options = Object.assign({}, options);
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}
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/**
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* This attempts to parse a package name that may include a scope component.
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* The packageName must not be an empty string.
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* @remarks
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* This function will not throw an exception.
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*
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* @returns an {@link IParsedPackageNameOrError} structure whose `error` property will be
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* nonempty if the string could not be parsed.
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*/
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tryParse(packageName) {
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const result = {
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scope: '',
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unscopedName: '',
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error: ''
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};
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let input = packageName;
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if (input === null || input === undefined) {
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result.error = 'The package name must not be null or undefined';
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return result;
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}
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// Rule from npmjs.com:
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// "The name must be less than or equal to 214 characters. This includes the scope for scoped packages."
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if (packageName.length > 214) {
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// Don't attempt to parse a ridiculously long input
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result.error = 'The package name cannot be longer than 214 characters';
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return result;
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}
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if (input[0] === '@') {
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const indexOfScopeSlash = input.indexOf('/');
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if (indexOfScopeSlash <= 0) {
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result.scope = input;
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result.error = `Error parsing "${packageName}": The scope must be followed by a slash`;
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return result;
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}
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// Extract the scope substring
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result.scope = input.substr(0, indexOfScopeSlash);
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input = input.substr(indexOfScopeSlash + 1);
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}
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result.unscopedName = input;
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if (result.scope === '@') {
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result.error = `Error parsing "${packageName}": The scope name cannot be empty`;
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return result;
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}
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if (result.unscopedName === '') {
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result.error = 'The package name must not be empty';
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return result;
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}
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// Rule from npmjs.com:
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// "The name can't start with a dot or an underscore."
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if (result.unscopedName[0] === '.' || result.unscopedName[0] === '_') {
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result.error = `The package name "${packageName}" starts with an invalid character`;
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return result;
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}
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// Convert "@scope/unscoped-name" --> "scopeunscoped-name"
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const nameWithoutScopeSymbols = (result.scope ? result.scope.slice(1, -1) : '') + result.unscopedName;
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if (!this._options.allowUpperCase) {
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// "New packages must not have uppercase letters in the name."
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// This can't be enforced because "old" packages are still actively maintained.
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// Example: https://www.npmjs.com/package/Base64
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// However it's pretty reasonable to require the scope to be lower case
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if (result.scope !== result.scope.toLowerCase()) {
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result.error = `The package scope "${result.scope}" must not contain upper case characters`;
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return result;
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}
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}
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// "The name ends up being part of a URL, an argument on the command line, and a folder name.
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// Therefore, the name can't contain any non-URL-safe characters"
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const match = nameWithoutScopeSymbols.match(PackageNameParser._invalidNameCharactersRegExp);
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if (match) {
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result.error = `The package name "${packageName}" contains an invalid character: "${match[0]}"`;
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return result;
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}
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return result;
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}
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/**
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* Same as {@link PackageName.tryParse}, except this throws an exception if the input
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* cannot be parsed.
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* @remarks
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* The packageName must not be an empty string.
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*/
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parse(packageName) {
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const result = this.tryParse(packageName);
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if (result.error) {
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throw new Error(result.error);
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}
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return result;
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}
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/**
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* {@inheritDoc IParsedPackageName.scope}
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*/
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getScope(packageName) {
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return this.parse(packageName).scope;
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}
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/**
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* {@inheritDoc IParsedPackageName.unscopedName}
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*/
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getUnscopedName(packageName) {
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return this.parse(packageName).unscopedName;
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}
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/**
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* Returns true if the specified package name is valid, or false otherwise.
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* @remarks
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* This function will not throw an exception.
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*/
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isValidName(packageName) {
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const result = this.tryParse(packageName);
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return !result.error;
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}
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/**
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* Throws an exception if the specified name is not a valid package name.
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* The packageName must not be an empty string.
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*/
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validate(packageName) {
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this.parse(packageName);
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}
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/**
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* Combines an optional package scope with an unscoped root name.
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* @param scope - Must be either an empty string, or a scope name such as "\@example"
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* @param unscopedName - Must be a nonempty package name that does not contain a scope
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* @returns A full package name such as "\@example/some-library".
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*/
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combineParts(scope, unscopedName) {
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if (scope !== '') {
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if (scope[0] !== '@') {
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throw new Error('The scope must start with an "@" character');
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}
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}
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if (scope.indexOf('/') >= 0) {
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throw new Error('The scope must not contain a "/" character');
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}
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if (unscopedName[0] === '@') {
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throw new Error('The unscopedName cannot start with an "@" character');
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}
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if (unscopedName.indexOf('/') >= 0) {
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throw new Error('The unscopedName must not contain a "/" character');
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}
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let result;
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if (scope === '') {
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result = unscopedName;
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}
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else {
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result = scope + '/' + unscopedName;
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}
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// Make sure the result is a valid package name
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this.validate(result);
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return result;
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}
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}
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// encodeURIComponent() escapes all characters except: A-Z a-z 0-9 - _ . ! ~ * ' ( )
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// However, these are disallowed because they are shell characters: ! ~ * ' ( )
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PackageNameParser._invalidNameCharactersRegExp = /[^A-Za-z0-9\-_\.]/;
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exports.PackageNameParser = PackageNameParser;
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/**
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* Provides basic operations for validating and manipulating NPM package names such as `my-package`
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* or `@scope/my-package`.
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*
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* @remarks
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* This is the default implementation of {@link PackageNameParser}, exposed as a convenient static class.
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* If you need to configure the parsing rules, use `PackageNameParser` instead.
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*
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* @public
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*/
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class PackageName {
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/** {@inheritDoc PackageNameParser.tryParse} */
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static tryParse(packageName) {
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return PackageName._parser.tryParse(packageName);
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}
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/** {@inheritDoc PackageNameParser.parse} */
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static parse(packageName) {
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return this._parser.parse(packageName);
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}
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/** {@inheritDoc PackageNameParser.getScope} */
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static getScope(packageName) {
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return this._parser.getScope(packageName);
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}
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/** {@inheritDoc PackageNameParser.getUnscopedName} */
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static getUnscopedName(packageName) {
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return this._parser.getUnscopedName(packageName);
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}
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/** {@inheritDoc PackageNameParser.isValidName} */
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static isValidName(packageName) {
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return this._parser.isValidName(packageName);
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}
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/** {@inheritDoc PackageNameParser.validate} */
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static validate(packageName) {
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return this._parser.validate(packageName);
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}
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/** {@inheritDoc PackageNameParser.combineParts} */
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static combineParts(scope, unscopedName) {
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return this._parser.combineParts(scope, unscopedName);
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}
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}
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PackageName._parser = new PackageNameParser();
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exports.PackageName = PackageName;
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//# sourceMappingURL=PackageName.js.map
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