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github.com_fedora-python_to.../src/tox_current_env/hooks.py

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import os
import shutil
import sys
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import tox
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@tox.hookimpl
def tox_addoption(parser):
parser.add_argument(
"--current-env",
action="store_true",
dest="current_env",
default=False,
help="Run tests in current environment, not creating any virtual environment",
)
parser.add_argument(
"--print-deps-only",
action="store_true",
dest="print_deps_only",
default=False,
help="Don't run tests, only print the dependencies",
)
@tox.hookimpl
def tox_configure(config):
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"""Stores options in the config. Makes all commands external"""
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if config.option.print_deps_only:
config.skipsdist = True
elif config.option.current_env:
config.skipsdist = True
for testenv in config.envconfigs:
config.envconfigs[testenv].whitelist_externals = "*"
return config
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class InterpreterMismatch(tox.exception.InterpreterNotFound):
"""Interpreter version in current env does not match requested version"""
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@tox.hookimpl
def tox_testenv_create(venv, action):
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"""We create a fake virtualenv with just the symbolic link"""
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config = venv.envconfig.config
if config.option.current_env or config.option.print_deps_only:
version_info = venv.envconfig.python_info.version_info
if version_info[:2] != sys.version_info[:2]:
raise InterpreterMismatch(
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f"tox_current_env: interpreter versions do not match:\n"
+ f" in current env: {tuple(sys.version_info)}\n"
+ f" requested: {version_info}"
)
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# Make sure the `python` command on path is sys.executable.
# (We might have e.g. /usr/bin/python3, not `python`.)
# Remove the rest of the virtualenv.
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link = venv.envconfig.get_envpython()
target = sys.executable
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shutil.rmtree(os.path.dirname(os.path.dirname(link)), ignore_errors=True)
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os.makedirs(os.path.dirname(link))
os.symlink(target, link)
return True
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else:
link = venv.envconfig.get_envpython()
shutil.rmtree(os.path.dirname(os.path.dirname(link)), ignore_errors=True)
return None # let tox handle the rest
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def _python_activate_exists(venv):
python = venv.envconfig.get_envpython()
bindir = os.path.dirname(python)
activate = os.path.join(bindir, "activate")
return os.path.exists(python), os.path.exists(activate)
def is_current_env_link(venv):
python, activate = _python_activate_exists(venv)
return python and not activate
def is_proper_venv(venv):
python, activate = _python_activate_exists(venv)
return python and activate
def unsupported_raise(config, venv):
if not config.option.recreate:
if not (
config.option.current_env or config.option.print_deps_only
) and is_current_env_link(venv):
raise tox.exception.ConfigError(
"Regular tox run after --current-env or --print-deps-only tox run is not supported without --recreate (-r)."
)
elif is_proper_venv(venv):
if config.option.current_env:
raise tox.exception.ConfigError(
"--current-env after regular tox run is not supported without --recreate (-r)."
)
elif config.option.print_deps_only:
raise tox.exception.ConfigError(
"--print-deps-only after regular tox run is not supported without --recreate (-r)."
)
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@tox.hookimpl
def tox_testenv_install_deps(venv, action):
"""We don't install anything"""
config = venv.envconfig.config
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unsupported_raise(config, venv)
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if config.option.current_env or config.option.print_deps_only:
return True
@tox.hookimpl
def tox_runtest(venv, redirect):
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config = venv.envconfig.config
unsupported_raise(config, venv)
if config.option.print_deps_only:
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for dependency in venv.get_resolved_dependencies():
print(dependency)
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return True