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const npmFetch = require('npm-registry-fetch')
const needsAuthError = (msg) =>
Object.assign(new Error(msg), { code: 'ENEEDAUTH' })
module.exports = async (npm, opts = {}) => {
const { registry } = opts
if (!registry)
throw Object.assign(new Error('No registry specified.'), { code: 'ENOREGISTRY' })
// First, check if we have a user/pass-based auth
const creds = npm.config.getCredentialsByURI(registry)
const { username: usernameFromURI, token } = creds
if (usernameFromURI) {
// Found username; return it
return usernameFromURI
} else if (token) {
// No username, but we have a token; fetch the username from registry
const registryData = await npmFetch.json('/-/whoami', {
...opts,
})
const { username: usernameFromRegistry } = registryData
// Retrieved username from registry; return it
if (usernameFromRegistry)
return usernameFromRegistry
else {
// Didn't get username from registry; bad token
throw needsAuthError(
'Your auth token is no longer valid. Please login again.'
)
}
} else {
// At this point, if they have a credentials object, it doesn't have a
// token or auth in it. Probably just the default registry.
throw needsAuthError('This command requires you to be logged in.')
}
}