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'use strict';
const url = require('url');
const got = require('got');
const registryUrl = require('registry-url');
const registryAuthToken = require('registry-auth-token');
const semver = require('semver');
module.exports = (name, opts) => {
const scope = name.split('/')[0];
const regUrl = registryUrl(scope);
const pkgUrl = url.resolve(regUrl, encodeURIComponent(name).replace(/^%40/, '@'));
const authInfo = registryAuthToken(regUrl, {recursive: true});
opts = Object.assign({
version: 'latest'
}, opts);
const headers = {
accept: 'application/vnd.npm.install-v1+json; q=1.0, application/json; q=0.8, */*'
};
if (opts.fullMetadata) {
delete headers.accept;
}
if (authInfo) {
headers.authorization = `${authInfo.type} ${authInfo.token}`;
}
return got(pkgUrl, {json: true, headers})
.then(res => {
let data = res.body;
let version = opts.version;
if (opts.allVersions) {
return data;
}
if (data['dist-tags'][version]) {
data = data.versions[data['dist-tags'][version]];
} else if (version) {
if (!data.versions[version]) {
const versions = Object.keys(data.versions);
version = semver.maxSatisfying(versions, version);
if (!version) {
throw new Error('Version doesn\'t exist');
}
}
data = data.versions[version];
if (!data) {
throw new Error('Version doesn\'t exist');
}
}
return data;
})
.catch(err => {
if (err.statusCode === 404) {
throw new Error(`Package \`${name}\` doesn't exist`);
}
throw err;
});
};
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