Unable to deploy a packaged service (This command can only be run in a Serverless service directory)

This is a Bug Report

Description

• What went wrong?
  I have created a vanilla aws-nodejs service.
  Then packaged and tried to deploy the artifacts outwith the source folder.

• What did you expect should have happened?
  The stack should have been deployed to AWS

• What was the config you used?

These are the steps to reproduce the issue from scratch

serverless create --template aws-nodejs --path hello-world
cd hello-world
serverless package --package artifacts
cd ..
serverless deploy --package hello-world/artifacts

The following error shows

  This command can only be run in a Serverless service directory

• What stacktrace or error message from your provider did you see?

Error: This command can only be run in a Serverless service directory
    at getServerlessConfigFile.then (/usr/local/lib/node_modules/serverless/lib/plugins/lib/validate.js:20:23)
From previous event:
    at Deploy.validate (/usr/local/lib/node_modules/serverless/lib/plugins/lib/validate.js:12:51)

I've looked at the source file in the stack trace
gerServerlessConfigFile.js

and it seems to be looking for one of the standard config files

const jsonPath = path.join(servicePath, 'serverless.json');
  const ymlPath = path.join(servicePath, 'serverless.yml');
  const yamlPath = path.join(servicePath, 'serverless.yaml');
  const jsPath = path.join(servicePath, 'serverless.js');

  return BbPromise.props({
    json: fileExists(jsonPath),
    yml: fileExists(ymlPath),
    yaml: fileExists(yamlPath),
    js: fileExists(jsPath),

If I understand this correctly, the point of generating a package was not to rely on having access to the serverless config in source.
So I'd say that there is something with the way the deploy --package command

Similar or dependent issues:

• #4692

Additional Data

• Serverless Framework Version you're using: 1.26.0
• Operating System: MacOs and Linux

thanks very much,

Jaume

Reproduce the commands in the issue, especially deploying with --package from the parent directory. Start with lib/utils/getServerlessConfigFile.js and lib/plugins/lib/validate.js, then trace how packaged deployment validation uses the service path. Done means the documented packaged service deploys successfully without the source directory present.