build: add mypy (optional) (#437)

.github/workflows/mypy.yml

@@ -0,0 +1,14 @@
+name: "Patch typing check"
+
+on:
+  push:
+    branches:
+      - main
+      - staging
+  pull_request:
+  merge_group:
+
+jobs:
+  patch-typing-check:
+    name: Run Patch Type Check
+    uses: codecov/gha-workflows/.github/workflows/mypy.yml@v1.2.18

.pre-commit-config.yaml

@@ -8,3 +8,9 @@ repos:
     pass_filenames: false
     require_serial: true
     language: system
+- repo: https://github.com/pre-commit/mirrors-mypy
+  rev: 'v1.10.0'
+  hooks:
+  - id: mypy
+    verbose: true
+    entry: bash -c 'mypy "$@" || true' --

mypy.ini

@@ -0,0 +1,7 @@
+# Global options:
+
+[mypy]
+disallow_untyped_defs = True
+ignore_missing_imports = True
+disable_error_code = attr-defined,import-untyped,name-defined
+follow_imports = silent