manager packaging tests: added a test checking existance of dependencies

ci/pkgtest.yaml

@@ -5,9 +5,9 @@ stages:
 # pkgbuild {{{
 .pkgbuild: &pkgbuild
   stage: pkgbuild
-  tags:
-    - lxc
-    - amd64
+#   tags:
+#     - lxc
+#     - amd64
   before_script:
     - git config --global user.name CI
     - git config --global user.email ci@nic

distro/tests/manager-packaging/control

+{# Test that all packages are installed #}
+Tests: dependencies.py
+Tests-Directory: manager/tests/packaging/
+
+
 {# Test that kresctl command exists and is in $PATH #}
 Tests: kresctl.sh
 Tests-Directory: manager/tests/packaging

manager/knot_resolver_manager/__main__.py

+# pylint: skip-file
+# flake8: noqa
+
 # throws nice syntax error on old Python versions:
 0_0  # Python >= 3.6 required
 

manager/tests/packaging/dependencies.py

+#!/usr/bin/python3
+
+import importlib
+import importlib.util
+import sys
+from types import ModuleType
+
+import pkg_resources
+
+# replace imports with mocks
+dummy = ModuleType("dummy")
+dummy.__dict__["setup"] = lambda *args, **kwargs: None
+dummy.__dict__["build"] = lambda *args, **kwargs: None
+sys.modules["setuptools"] = dummy
+sys.modules["build"] = dummy
+
+# load install_requires array from setup.py
+spec = importlib.util.spec_from_file_location("setup", "manager/setup.py")
+mod = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(mod)
+install_requires = mod.install_requires
+
+# stip version codes
+deps = set((x[: x.index(">")].lower() for x in install_requires))
+
+# find out which packages are missing
+installed = {pkg.key for pkg in pkg_resources.working_set}
+missing = deps - installed
+
+# fail if there are some missing
+if len(missing) > 0:
+    print(f"Some required packages are missing: {missing}", file=sys.stderr)
+    exit(1)