[domain] checks versions specified in __deps__ variable of domain module

Dockerfile

@@ -4,9 +4,6 @@ COPY . /halfapi
 WORKDIR /halfapi
 RUN apt-get update > /dev/null && apt-get -y install git > /dev/null
 RUN pip install gunicorn uvicorn
-# Install package with extra_requires for testing
+RUN pip install .
-RUN pip install ".[tests]"
-ENV PYTHONPATH=./tests
-RUN pytest
 CMD gunicorn halfapi.app
 

Pipfile

@@ -25,6 +25,7 @@ timing-asgi = ">=0.2.1,<1"
 schema = ">=0.7.4,<1"
 toml = "*"
 pip = "*"
+packaging = "*"
 
 [scripts]
 halfapi = "python -m halfapi"

halfapi/half_domain.py

@@ -3,6 +3,8 @@ import inspect
 import os
 import re
 
+from packaging.specifiers import SpecifierSet
+from packaging.version import Version
 from typing import Coroutine, Dict, Iterator, List, Tuple
 from types import ModuleType, FunctionType
 
@@ -42,6 +44,8 @@ class HalfDomain(Starlette):
         # TODO: Check if given domain halfapi_version matches with __version__
         self.halfapi_version = getattr(self.m_domain, '__halfapi_version__', __version__)
 
+        self.deps = getattr(self.m_domain, '__deps__', tuple())
+
         if not router:
             self.router = getattr('__router__', domain, '.routers')
         else:
@@ -54,6 +58,18 @@ class HalfDomain(Starlette):
         self.config = { **app.config }
 
         logger.info('HalfDomain creation %s %s', domain, self.config)
+
+        for elt in self.deps:
+            package, version = elt
+            specifier = SpecifierSet(version)
+            package_module = importlib.import_module(package)
+            if Version(package_module.__version__) not in specifier:
+                raise Exception(
+                    'Wrong version for package {} version {} (excepting {})'.format(
+                        package, package_module.__version__, specifier
+                    ))
+
+
         super().__init__(
             routes=self.gen_domain_routes(),
             middleware=[

halfapi/testing/test_domain.py

@@ -3,6 +3,7 @@ import functools
 import os
 import sys
 import json
+from json.decoder import JSONDecodeError
 from unittest import TestCase
 from starlette.testclient import TestClient
 from click.testing import CliRunner
@@ -84,6 +85,11 @@ class TestDomain(TestCase):
             print(f'Stdout {result.stdout}')
             print(f'Stderr {result.stderr}')
             raise exc
+        except JSONDecodeError as exc:
+            print(f'Result {result}')
+            print(f'Stdout {result.stdout}')
+            raise exc
+
 
 
         return result_d

tests/dummy_domain/__init__.py

@@ -1,6 +1,12 @@
+from halfapi import __version__ as halfapi_version
+
 __name__ = 'dummy_domain'
 __version__ = '0.0.0'
 __patch_release__ = '0.0.0'
 __routers__ = '.routers'
 __id__ = '8b88e60a625369235b36c2d6d70756a0c02c1c7fb169fcee6dc820bcf9723f5a'
 
+__deps__ = (
+    ('halfapi', '=={}'.format(halfapi_version)),
+)
+