Resolve private GitHub https access (~/.netrc file).

[Syntactical01]

Issue:

Scenario::

• Trying to package a project that uses a setup.py which has a dependency from a private GitHub repository.

Problem: The follow DroneCI step fails because the pip installation fails saying it does not have access to the repository.

  - name: build-deployment
    image: 3mcloud/lambda-packager:python-3.7
    pull: always
    depends_on: []
    environment:
      LAMBDA_CODE_DIR: ./src
      ARTIFACT_NAME: deployment.zip

But the following step works without issues.

  - name: build-deployment
    image: 3mcloud/lambda-packager:python-3.7
    pull: always
    depends_on: []
    environment:
      LAMBDA_CODE_DIR: ./src
      ARTIFACT_NAME: deployment.zip
    commands:
    - /entrypoint.sh

The reason for this is in regards to when the volume mount happens. In the second scenario the entrypoint.sh script runs after the volume mount, in which case drone mounts ~/.netrc which is used for GitHub access. In the first case, the ~/.netrc file is not yet mounted when CMD ["/entrypoint.sh"] is run within the Docker image, thus there is not GitHub access for the clone to work.

To verify this, I swapped out CMD ["/entrypoint.sh"] with CMD ["/entrypoint.sh && cat ~/.netrc"] in one of the Dockerfiles and got:

We should switch to using environment variables to generate the ~/.netrc file.