Remove dependency on ansible library

molecule/config.py

@@ -23,12 +23,12 @@
 from uuid import uuid4
 
 import pkg_resources
-from ansible.module_utils.parsing.convert_bool import boolean
 
 from molecule import api, interpolation, logger, platforms, scenario, state, util
 from molecule.dependency import ansible_galaxy, gilt, shell
 from molecule.model import schema_v3
 from molecule.provisioner import ansible
+from molecule.util import boolean
 
 LOG = logger.get_logger(__name__)
 MOLECULE_DEBUG = boolean(os.environ.get("MOLECULE_DEBUG", "False"))

molecule/logger.py

@@ -22,16 +22,28 @@
 import logging
 import os
 import sys
+from typing import Any
 
 import colorama
-from ansible.module_utils.parsing.convert_bool import boolean as to_bool
+
+
+# Based on Ansible implementation
+def to_bool(a: Any) -> bool:
+    """Return a bool for the arg."""
+    if a is None or isinstance(a, bool):
+        return bool(a)
+    if isinstance(a, str):
+        a = a.lower()
+    if a in ("yes", "on", "1", "true", 1):
+        return True
+    return False
 
 
 def should_do_markup() -> bool:
     """Decide about use of ANSI colors."""
     py_colors = os.environ.get("PY_COLORS", None)
     if py_colors is not None:
-        return to_bool(py_colors, strict=False)
+        return to_bool(py_colors)
 
     return sys.stdout.isatty() and os.environ.get("TERM") != "dumb"
 

molecule/shell.py

@@ -19,7 +19,9 @@
 #  DEALINGS IN THE SOFTWARE.
 """Molecule Shell Module."""
 
+import subprocess
 import sys
+from functools import lru_cache
 
 import click
 import click_completion
@@ -40,20 +42,27 @@
 LOCAL_CONFIG_SEARCH = ".config/molecule/config.yml"
 LOCAL_CONFIG = lookup_config_file(LOCAL_CONFIG_SEARCH)
 
-
 ENV_FILE = ".env.yml"
 
 
+@lru_cache()
 def _version_string() -> str:
 
     v = pkg_resources.parse_version(molecule.__version__)
     color = "bright_yellow" if v.is_prerelease else "green"  # type: ignore
     msg = "molecule %s\n" % _colorize(molecule.__version__, color)
 
-    try:
-        ansible_version = pkg_resources.get_distribution("ansible-base").version
-    except Exception:
-        ansible_version = pkg_resources.get_distribution("ansible").version
+    # extract ansible from the command line
+    ansible_version = (
+        subprocess.run(
+            ["ansible", "--version"],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            universal_newlines=True,
+        )
+        .stdout.splitlines()[0]
+        .split()[1]
+    )
 
     msg += _colorize(
         "   ansible==%s python==%s.%s"

molecule/test/scenarios/plugins/library/project_library.py

@@ -21,6 +21,7 @@
 #  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 #  DEALINGS IN THE SOFTWARE.
 """testplugin role plugin library project_library."""
+from ansible.module_utils.basic import AnsibleModule
 
 
 def main():
@@ -35,6 +36,4 @@ def main():
     module.exit_json(**ansible_facts_dict)
 
 
-from ansible.module_utils.basic import *  # noqa
-
 main()

molecule/util.py

@@ -27,6 +27,7 @@
 import sys
 from collections.abc import Mapping
 from functools import lru_cache  # noqa
+from typing import Any
 
 import colorama
 import jinja2
@@ -360,3 +361,29 @@ def lookup_config_file(filename: str) -> str:
             LOG.info("Found config file %s", f)
             return f
     return f
+
+
+def boolean(value: Any, strict=True) -> bool:
+    """Evaluate any object as boolean matching ansible behavior."""
+    # Based on https://github.com/ansible/ansible/blob/devel/lib/ansible/module_utils/parsing/convert_bool.py
+
+    BOOLEANS_TRUE = frozenset(("y", "yes", "on", "1", "true", "t", 1, 1.0, True))
+    BOOLEANS_FALSE = frozenset(("n", "no", "off", "0", "false", "f", 0, 0.0, False))
+    BOOLEANS = BOOLEANS_TRUE.union(BOOLEANS_FALSE)
+
+    if isinstance(value, bool):
+        return value
+
+    normalized_value = value
+    if isinstance(value, (str, bytes)):
+        normalized_value = str(value).lower().strip()
+
+    if normalized_value in BOOLEANS_TRUE:
+        return True
+    elif normalized_value in BOOLEANS_FALSE or not strict:
+        return False
+
+    raise TypeError(
+        "The value '%s' is not a valid boolean.  Valid booleans include: %s"
+        % (str(value), ", ".join(repr(i) for i in BOOLEANS))
+    )

setup.cfg

@@ -63,8 +63,6 @@ setup_requires =
 
 # These are required in actual runtime:
 install_requires =
-    ansible >= 2.8  # keep it N/N-1
-
     cerberus >= 1.3.1
     click >= 7.0
     click-completion >= 0.5.1
@@ -98,6 +96,8 @@ docker =
 windows =
     pywinrm
 test =
+    ansible >= 2.8  # keep it N/N-1
+
     ansi2html
     coverage < 5  # https://github.com/pytest-dev/pytest-cov/issues/250