Add sanity import test to ansible-test. (#26730)

* Add sanity import test to ansible-test.
* Run sanity import test on all python versions.

test/runner/lib/sanity.py

@@ -19,6 +19,7 @@ from lib.util import (
     run_command,
     deepest_path,
     parse_to_dict,
+    remove_tree,
 )
 
 from lib.ansible_util import (
@@ -38,6 +39,7 @@ from lib.executor import (
     install_command_requirements,
     SUPPORTED_PYTHON_VERSIONS,
     intercept_command,
+    generate_pip_install,
 )
 
 from lib.config import (
@@ -668,6 +670,91 @@ def command_sanity_ansible_doc(args, targets, python_version):
     return SanitySuccess(test, python_version=python_version)
 
 
+def command_sanity_import(args, targets, python_version):
+    """
+    :type args: SanityConfig
+    :type targets: SanityTargets
+    :type python_version: str
+    :rtype: SanityResult
+    """
+    test = 'import'
+
+    with open('test/sanity/import/skip.txt', 'r') as skip_fd:
+        skip_paths = skip_fd.read().splitlines()
+
+    skip_paths_set = set(skip_paths)
+
+    paths = sorted(
+        i.path
+        for i in targets.include
+        if os.path.splitext(i.path)[1] == '.py' and
+        (i.path.startswith('lib/ansible/modules/') or i.path.startswith('lib/ansible/module_utils/')) and
+        i.path not in skip_paths_set
+    )
+
+    if not paths:
+        return SanitySkipped(test, python_version=python_version)
+
+    env = ansible_environment(args, color=False)
+
+    # create a clean virtual environment to minimize the available imports beyond the python standard library
+    virtual_environment_path = os.path.abspath('test/runner/.tox/minimal-py%s' % python_version.replace('.', ''))
+    virtual_environment_bin = os.path.join(virtual_environment_path, 'bin')
+
+    remove_tree(virtual_environment_path)
+
+    cmd = ['virtualenv', virtual_environment_path, '--python', 'python%s' % python_version, '--no-setuptools', '--no-wheel']
+
+    if not args.coverage:
+        cmd.append('--no-pip')
+
+    run_command(args, cmd, capture=True)
+
+    # add the importer to our virtual environment so it can be accessed through the coverage injector
+    importer_path = os.path.join(virtual_environment_bin, 'importer.py')
+    os.symlink(os.path.abspath('test/runner/importer.py'), importer_path)
+
+    # activate the virtual environment
+    env['PATH'] = '%s:%s' % (virtual_environment_bin, env['PATH'])
+    env['PYTHONPATH'] = os.path.abspath('test/runner/import/lib')
+
+    # make sure coverage is available in the virtual environment if needed
+    if args.coverage:
+        run_command(args, generate_pip_install('sanity.import', packages=['coverage']), env=env)
+        run_command(args, ['pip', 'uninstall', '--disable-pip-version-check', '-y', 'pip'], env=env)
+
+    cmd = ['importer.py'] + paths
+
+    results = []
+
+    try:
+        stdout, stderr = intercept_command(args, cmd, target_name=test, env=env, capture=True, python_version=python_version, path=env['PATH'])
+
+        if stdout or stderr:
+            raise SubprocessError(cmd, stdout=stdout, stderr=stderr)
+    except SubprocessError as ex:
+        if ex.status != 10 or ex.stderr or not ex.stdout:
+            raise
+
+        pattern = r'^(?P<path>[^:]*):(?P<line>[0-9]+):(?P<column>[0-9]+): (?P<message>.*)$'
+
+        results = [re.search(pattern, line).groupdict() for line in ex.stdout.splitlines()]
+
+        results = [SanityMessage(
+            message=r['message'],
+            path=r['path'],
+            line=int(r['line']),
+            column=int(r['column']),
+        ) for r in results]
+
+        results = [result for result in results if result.path not in skip_paths]
+
+    if results:
+        return SanityFailure(test, messages=results, python_version=python_version)
+
+    return SanitySuccess(test, python_version=python_version)
+
+
 def collect_code_smell_tests():
     """
     :rtype: tuple(SanityFunc)
@@ -771,6 +858,7 @@ SANITY_TESTS = (
     SanityFunc('rstcheck', command_sanity_rstcheck, intercept=False),
     SanityFunc('validate-modules', command_sanity_validate_modules, intercept=False),
     SanityFunc('ansible-doc', command_sanity_ansible_doc),
+    SanityFunc('import', command_sanity_import),
 )