Add --force-linters option to pylint (#179)

When this option is provided, linters will be run regardless of the
version installed. Normally tests are skipped if the linters are not the
supported version.

test/conftest.py

@@ -12,6 +12,16 @@ import py
 import pytest
 
 
+def pytest_addoption(parser):
+    """Add options to pytest"""
+    parser.addoption(
+        "--force-linters",
+        action="store_true",
+        default=False,
+        help="Run linters regardless of installed versions",
+    )
+
+
 @pytest.fixture(scope='session')
 def shellcheck_version():
     """Version of shellcheck supported"""

test/test_syntax.py

@@ -10,20 +10,22 @@ def test_yadm_syntax(runner, yadm):
     assert run.success
 
 
-def test_shellcheck(runner, yadm, shellcheck_version):
+def test_shellcheck(pytestconfig, runner, yadm, shellcheck_version):
     """Passes shellcheck"""
-    run = runner(command=['shellcheck', '-V'], report=False)
-    if f'version: {shellcheck_version}' not in run.out:
-        pytest.skip('Unsupported shellcheck version')
+    if not pytestconfig.getoption("--force-linters"):
+        run = runner(command=['shellcheck', '-V'], report=False)
+        if f'version: {shellcheck_version}' not in run.out:
+            pytest.skip('Unsupported shellcheck version')
     run = runner(command=['shellcheck', '-s', 'bash', yadm])
     assert run.success
 
 
-def test_pylint(runner, pylint_version):
+def test_pylint(pytestconfig, runner, pylint_version):
     """Passes pylint"""
-    run = runner(command=['pylint', '--version'], report=False)
-    if f'pylint {pylint_version}' not in run.out:
-        pytest.skip('Unsupported pylint version')
+    if not pytestconfig.getoption("--force-linters"):
+        run = runner(command=['pylint', '--version'], report=False)
+        if f'pylint {pylint_version}' not in run.out:
+            pytest.skip('Unsupported pylint version')
     pyfiles = list()
     for tfile in os.listdir('test'):
         if tfile.endswith('.py'):
@@ -32,20 +34,22 @@ def test_pylint(runner, pylint_version):
     assert run.success
 
 
-def test_flake8(runner, flake8_version):
+def test_flake8(pytestconfig, runner, flake8_version):
     """Passes flake8"""
-    run = runner(command=['flake8', '--version'], report=False)
-    if not run.out.startswith(flake8_version):
-        pytest.skip('Unsupported flake8 version')
+    if not pytestconfig.getoption("--force-linters"):
+        run = runner(command=['flake8', '--version'], report=False)
+        if not run.out.startswith(flake8_version):
+            pytest.skip('Unsupported flake8 version')
     run = runner(command=['flake8', 'test'])
     assert run.success
 
 
-def test_yamllint(runner, yamllint_version):
+def test_yamllint(pytestconfig, runner, yamllint_version):
     """Passes yamllint"""
-    run = runner(command=['yamllint', '--version'], report=False)
-    if not run.out.strip().endswith(yamllint_version):
-        pytest.skip('Unsupported yamllint version')
+    if not pytestconfig.getoption("--force-linters"):
+        run = runner(command=['yamllint', '--version'], report=False)
+        if not run.out.strip().endswith(yamllint_version):
+            pytest.skip('Unsupported yamllint version')
     run = runner(
         command=['yamllint', '-s', '$(find . -name \\*.yml)'],
         shell=True)