Ensure that containers.podman collection is present (#40)

Adds check for presence of containers.podman collection and requires
the latest known version to present. This means that this driver
will no longer work with podman modules shipped with Ansible 2.9.

Still, installing the collection on 2.9 will make it work but that
must be run by the user.

.pre-commit-config.yaml

@@ -50,12 +50,14 @@ repos:
         entry: mypy lib/
         pass_filenames: false
         additional_dependencies:
+          - ansible-lint>=5.1.0a0
           - molecule
           - packaging
   - repo: https://github.com/pre-commit/mirrors-pylint
     rev: v2.6.0
     hooks:
       - id: pylint
         additional_dependencies:
-          - ansible-base
+          - ansible-core>=2.11.1
+          - ansible-lint>=5.1.0a0
           - molecule

README.rst

@@ -17,9 +17,13 @@ Molecule Podman Plugin
    :target: LICENSE
    :alt: Repository License
 
-Molecule podman Plugin is designed to allow use Podman containers for
+Molecule Podman Plugin is designed to allow use Podman containers for
 provisioning test resources.
 
+This plugin requires `containers.podman` collection to be present:
+
+    ansible-galaxy collection install containers.podman
+
 Please note that this driver is currently in its early stage of development.
 
 .. _get-involved:

lib/molecule_podman/driver.py

@@ -23,6 +23,7 @@
 
 import os
 
+from ansiblelint.prerun import require_collection
 from molecule import logger
 from molecule.api import Driver
 from molecule.util import lru_cache
@@ -189,3 +190,4 @@ def ansible_connection_options(self, instance_name):
     def sanity_checks(self):
         """Implement Podman driver sanity checks."""
         log.info("Sanity checks: '{}'".format(self._name))
+        require_collection("containers.podman", "1.6.1")

setup.cfg

@@ -66,6 +66,8 @@ setup_requires =
 
 # These are required in actual runtime:
 install_requires =
+    # we need require_collection from ansiblelint.prerun
+    ansible-lint >= 5.1.0a0
     molecule >= 3.2.0
     # selinux python module is needed as least by ansible-podman modules
     # and allows us of isolated (default) virtualenvs. It does not avoid need

tox.ini

@@ -43,7 +43,9 @@ deps =
     dockerfile: ansible>=2.9.12
     selinux
 commands =
-    ansibledevel: ansible-galaxy install git+https://github.com/ansible-collections/community.general.git
+    ansibledevel: ansible-galaxy collection install git+https://github.com/containers/ansible-podman-collections
+    # this should mention oldest version we find acceptable for runtime
+    ansible-galaxy collection install 'containers.podman:==1.6.1'
     # failsafe as pip may install incompatible dependencies
     pip check
     # failsafe for preventing changes that may break pytest collection