__init__.py

import datetime
import os

USE_DOKKU = os.environ.get("USE_DOKKU") == "on"
USE_EB = os.environ.get("USE_EB") == "on"
USE_EC2 = os.environ.get("USE_EC2") == "on"
USE_ECS = os.environ.get("USE_ECS") == "on"
USE_EKS = os.environ.get("USE_EKS") == "on"
USE_GOVCLOUD = os.environ.get("USE_GOVCLOUD") == "on"
USE_NAT_GATEWAY = os.environ.get("USE_NAT_GATEWAY") == "on"

if USE_EKS:
    from . import sftp  # noqa: F401
    from . import assets  # noqa: F401
    from . import vpc  # noqa: F401
    from . import template
    from . import repository  # noqa: F401
    from . import eks  # noqa: F401
    from . import cache  # noqa: F401
    from . import database  # noqa: F401
    from . import logs  # noqa: F401
    if not USE_GOVCLOUD:
        # make sure this isn't added to the template for GovCloud, as it's not
        # supported in this region
        from . import search  # noqa: F401

    if USE_NAT_GATEWAY:
        from . import bastion  # noqa: F401

else:
    from . import sftp  # noqa: F401
    from . import assets  # noqa: F401
    from . import cache  # noqa: F401
    from . import database  # noqa: F401
    from . import logs  # noqa: F401
    from . import vpc  # noqa: F401
    from . import template

    if not USE_GOVCLOUD:
        # make sure this isn't added to the template for GovCloud, as it's not
        # supported in this region
        from . import search  # noqa: F401

    if USE_NAT_GATEWAY:
        from . import bastion  # noqa: F401

    if USE_ECS:
        from . import repository  # noqa: F401
        from . import ecs_cluster  # noqa: F401
    elif USE_EB:
        from . import repository  # noqa: F401
        from . import eb  # noqa: F401
    elif USE_DOKKU:
        from . import dokku  # noqa: F401
    elif USE_EC2 or USE_GOVCLOUD:
        # USE_GOVCLOUD and USE_EC2 both provide EC2 instances
        from . import instances  # noqa: F401

# Must be last to tag all resources
from . import tags  # noqa: F401

# Since we're outputting YAML, we can include comments
print("# This Cloudformation stack template was generated by")
print("# https://github.com/caktus/aws-web-stacks")
print("# at %s" % datetime.datetime.now())
print("# with parameters:")
parms_used = sorted(parm for parm in os.environ.keys() if parm.startswith("USE_") or parm == "DEFAULTS_FILE")
for parm in parms_used:
    print("#\t%s = %s" % (parm, os.environ[parm]))
print()
print(template.template.to_yaml())