Add python mypy check to CI

docker/test/style/Dockerfile

@@ -17,7 +17,7 @@ RUN apt-get update && env DEBIAN_FRONTEND=noninteractive apt-get install --yes \
     python3-pip \
     shellcheck \
     yamllint \
-    && pip3 install black==22.8.0 boto3 codespell==2.2.1 dohq-artifactory PyGithub unidiff pylint==2.6.2 \
+    && pip3 install black==22.8.0 boto3 codespell==2.2.1 dohq-artifactory mypy PyGithub unidiff pylint==2.6.2 \
     && apt-get clean \
     && rm -rf /root/.cache/pip
 

docker/test/style/process_style_check_result.py

@@ -15,6 +15,7 @@ def process_result(result_folder):
         "shellcheck",
         "style",
         "black",
+        "mypy",
         "typos",
         "whitespaces",
         "workflows",

docker/test/style/run.sh

@@ -9,6 +9,8 @@ echo "Check style" | ts
 ./check-style -n              |& tee /test_output/style_output.txt
 echo "Check python formatting with black" | ts
 ./check-black -n              |& tee /test_output/black_output.txt
+echo "Check python type hinting with mypy" | ts
+./check-mypy -n              |& tee /test_output/mypy_output.txt
 echo "Check typos" | ts
 ./check-typos                 |& tee /test_output/typos_output.txt
 echo "Check docs spelling" | ts

utils/check-style/check-mypy

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+# The mypy supports pyproject.toml, but unfortunately it doesn't support it recursively
+# https://github.com/python/mypy/issues/10613
+#
+# Unless it's done, mypy only runs against tests/ci
+# Let's leave here a room for improvement and redo it when mypy will test anything else
+
+GIT_ROOT=$(git rev-parse --show-cdup)
+GIT_ROOT=${GIT_ROOT:-.}
+CONFIG="$GIT_ROOT/tests/ci/.mypy.ini"
+DIRS=("$GIT_ROOT/tests/ci/" "$GIT_ROOT/tests/ci/"*/)
+tmp=$(mktemp)
+for dir in "${DIRS[@]}"; do
+  if ! compgen -G "$dir"/*.py > /dev/null; then
+    continue
+  fi
+  if ! mypy --config-file="$CONFIG" --sqlite-cache "$dir"/*.py > "$tmp" 2>&1; then
+    echo "Errors while processing $dir":
+    cat "$tmp"
+  fi
+done
+rm -rf "$tmp"