115 lines
2.7 KiB
JavaScript
115 lines
2.7 KiB
JavaScript
'use strict';
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const {URL} = require('url');
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const {Agent: HttpAgent} = require('http');
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const {Agent: HttpsAgent} = require('https');
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const got = require('got');
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const registryUrl = require('registry-url');
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const registryAuthToken = require('registry-auth-token');
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const semver = require('semver');
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// These agent options are chosen to match the npm client defaults and help with performance
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// See: `npm config get maxsockets` and #50
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const agentOptions = {
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keepAlive: true,
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maxSockets: 50
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};
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const httpAgent = new HttpAgent(agentOptions);
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const httpsAgent = new HttpsAgent(agentOptions);
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class PackageNotFoundError extends Error {
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constructor(packageName) {
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super(`Package \`${packageName}\` could not be found`);
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this.name = 'PackageNotFoundError';
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}
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}
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class VersionNotFoundError extends Error {
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constructor(packageName, version) {
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super(`Version \`${version}\` for package \`${packageName}\` could not be found`);
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this.name = 'VersionNotFoundError';
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}
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}
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const packageJson = async (packageName, options) => {
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options = {
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version: 'latest',
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...options
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};
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const scope = packageName.split('/')[0];
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const registryUrl_ = options.registryUrl || registryUrl(scope);
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const packageUrl = new URL(encodeURIComponent(packageName).replace(/^%40/, '@'), registryUrl_);
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const authInfo = registryAuthToken(registryUrl_.toString(), {recursive: true});
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const headers = {
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accept: 'application/vnd.npm.install-v1+json; q=1.0, application/json; q=0.8, */*'
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};
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if (options.fullMetadata) {
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delete headers.accept;
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}
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if (authInfo) {
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headers.authorization = `${authInfo.type} ${authInfo.token}`;
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}
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const gotOptions = {
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json: true,
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headers,
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agent: {
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http: httpAgent,
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https: httpsAgent
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}
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};
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if (options.agent) {
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gotOptions.agent = options.agent;
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}
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let response;
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try {
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response = await got(packageUrl, gotOptions);
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} catch (error) {
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if (error.statusCode === 404) {
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throw new PackageNotFoundError(packageName);
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}
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throw error;
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}
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let data = response.body;
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if (options.allVersions) {
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return data;
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}
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let {version} = options;
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const versionError = new VersionNotFoundError(packageName, version);
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if (data['dist-tags'][version]) {
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data = data.versions[data['dist-tags'][version]];
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} else if (version) {
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if (!data.versions[version]) {
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const versions = Object.keys(data.versions);
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version = semver.maxSatisfying(versions, version);
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if (!version) {
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throw versionError;
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}
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}
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data = data.versions[version];
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if (!data) {
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throw versionError;
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}
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}
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return data;
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};
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module.exports = packageJson;
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// TODO: remove this in the next major version
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module.exports.default = packageJson;
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module.exports.PackageNotFoundError = PackageNotFoundError;
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module.exports.VersionNotFoundError = VersionNotFoundError;
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