vars defined at the global level in dbt_project.yml v2 don't end up in schema parsing

[beckjake]

Steps to reproduce

(copy+pasted from Claire in slack)

Add a variable to a package, e.g.:

name: 'marketo_source'
version: '1.0.0'
require-dbt-version: '>=0.17.0'
config-version: 2
vars:
    schema: marketo
    database: raw

2. Call the var in the same package:

version: 2
sources:
  - name: marketo
    schema: "{{ var('schema') }}"
    database: "{{ var('database') }}"
    tables:
      - name: lead

3. Install the package in another project, and dbt compile

4. Get this error:

Compilation Error
  Required var 'database' not found in config:
  Vars supplied to <Configuration> = {}

5. Move the vars to be package scoped:

name: 'marketo_source'
version: '1.0.0'
require-dbt-version: '>=0.17.0'
config-version: 2
vars:
  marketo_source:
    schema: marketo
    database: raw

6. Try again, everything works.

Expected behavior:

The var should be resolved in both instances. Vars available in the global scope should behave as if they were in package scope unless overridden by package scope.

System information

Which database are you using dbt with?

• postgres
• redshift
• bigquery
• snowflake
• other (specify: ____________)

The output of dbt --version:

dbt 0.17.0rc1

Any OS, any Python, any database

[drewbanin]

closed by #2477