bad archive error when required args are not supplied

[drewbanin]

Error:

join() argument must be str or bytes, not 'NoneType'

This can be caused by typos in the Archival spec, eg:

archive:
  # these should be underscores
  - source-schema: public
    target-schema: dbt_archive
...

dbt should instead show a more helpful error, ideally linking to the docs

[drewbanin]

see also: #706

[drewbanin]

This was fixed as a part of adding a schema for dbt_project.yml. The above example now returns:

$ dbt archive
Encountered an error while reading the project:
Runtime Error
  Runtime Error
    Invalid arguments passed to "Project" instance: archive.0.Additional properties are not allowed ('target-schema', 'source-schema' were unexpected), archive.0.'target_schema' is a required property, archive.0.'source_schema' is a required property
Encountered an error:
Runtime Error
  Could not run dbt

That's not the prettiest error I've ever seen, but it's pretty descriptive. Closing this.