Add pyright as a pre-commit check

Another pair of eyes, pyright is a type check plus a bit more, and will
inspect the code from slightyl different point of view. As a result, it
will report issues mypy cannot spot, or cannot spot *yet* because the
set of implemented checks is simply different.

The slow, gradual approach is the key here, like the one we know from
mypy introduction, and slowly files and packages will get covered.

.pre-commit-config.yaml

@@ -37,6 +37,25 @@ repos:
         pass_filenames: false
         args: [--config-file=pyproject.toml]
 
+  - repo: https://github.com/RobertCraigie/pyright-python
+    rev: v1.1.310
+    hooks:
+      - id: pyright
+        # TODO: find out how to amend pyright, pre-commit and package requirements.
+        # Apparently, there is no easy way to avoid some level of duplication of
+        # information when the package is *not* installed, which is the case of tmt
+        # & pre-commit in our setup.
+        additional_dependencies:
+          - 'fmf>=1.2.1'
+          - 'click'
+          - 'requests'
+          - 'urllib3'
+          - 'ruamel.yaml'
+          - 'jinja2'
+          - 'setuptools'
+          - 'typing-extensions>=3.7.4.3'
+          - importlib_metadata
+
   - repo: https://github.com/python-jsonschema/check-jsonschema
     rev: "0.22.0"
     hooks:

pyproject.toml

@@ -32,6 +32,23 @@ module = [
 ]
 ignore_missing_imports = true
 
+[tool.pyright]
+include = [
+    "bin/tmt",
+    "setup.py"
+]
+ignore = [
+    "docs/**",
+    "examples/**",
+    "tests/**",
+    "tmt/**"
+]
+
+pythonVersion = "3.7"
+pythonPlatform = "Linux"
+
+typeCheckingMode = "strict"
+
 # code is currently formatted with default isort config
 #[tool.isort]
 #line_length = 99

setup.py

@@ -47,6 +47,14 @@
 __desc__ = 'Test Management Tool'
 __scripts__ = ['bin/tmt']
 
+# TODO: find out how to amend pyright, pre-commit and package requirements.
+# Apparently, there is no easy way to avoid some level of duplication of
+# information when the package is *not* installed, which is the case of tmt
+# & pre-commit in our setup.
+#
+# For now, requirements are also listed in `.pre-commit-config.yaml` which
+# is just ugly...
+
 # Prepare install requires and extra requires
 install_requires = [
     'fmf>=1.2.1',