BLD: Run flake8 check on Cython files in pre-commit

Author: xhochy

.flake8.cython

@@ -0,0 +1,3 @@
+[flake8]
+filename = *.pyx,*.pxd,*.pxi
+select=E501,E302,E203,E111,E114,E221,E303,E128,E231,E126,E265,E305,E301,E127,E261,E271,E129,W291,E222,E241,E123,F403,C400,C401,C402,C403,C404,C405,C406,C407,C408,C409,C410,C411

.flake8.cython-header

@@ -0,0 +1,4 @@
+[flake8]
+filename = *.pxd,*.pxi,*.pxi.in
+select = E501,E302,E203,E111,E114,E221,E303,E231,E126,F403
+

.pre-commit-config.yaml

@@ -10,6 +10,20 @@ repos:
     -   id: flake8
         language: python_venv
         additional_dependencies: [flake8-comprehensions>=3.1.0]
+    -   id: flake8
+        name: flake8-pyx
+        language: python_venv
+        files: \.pyx$
+        types:
+          - file
+        args: [--append-config=.flake8.cython]
+    -   id: flake8
+        name: flake8-pxd
+        language: python_venv
+        files: \.(pxd|pxi\.in)$
+        types:
+          - file
+        args: [--append-config=.flake8.cython-header]
 -   repo: https://github.com/pre-commit/mirrors-isort
     rev: v4.3.21
     hooks:

ci/code_checks.sh

@@ -66,11 +66,11 @@ if [[ -z "$CHECK" || "$CHECK" == "lint" ]]; then
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Linting .pyx code' ; echo $MSG
-    flake8 --format="$FLAKE8_FORMAT" pandas --filename=*.pyx --select=E501,E302,E203,E111,E114,E221,E303,E128,E231,E126,E265,E305,E301,E127,E261,E271,E129,W291,E222,E241,E123,F403,C400,C401,C402,C403,C404,C405,C406,C407,C408,C409,C410,C411
+    flake8 --format="$FLAKE8_FORMAT" pandas --append-config=.flake8.cython
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Linting .pxd and .pxi.in' ; echo $MSG
-    flake8 --format="$FLAKE8_FORMAT" pandas/_libs --filename=*.pxi.in,*.pxd --select=E501,E302,E203,E111,E114,E221,E303,E231,E126,F403
+    flake8 --format="$FLAKE8_FORMAT" pandas/_libs --append-config=.flake8.cython-header
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     echo "flake8-rst --version"