update flake8 configuration and ci

Author: kkraus14

.pre-commit-config.yaml

@@ -4,15 +4,19 @@ repos:
         hooks:
               - id: isort
       - repo: https://github.com/ambv/black
-        rev: stable
+        rev: 19.10b0
         hooks:
               - id: black
       - repo: https://gitlab.com/pycqa/flake8
-        rev: 3.7.7
+        rev: 3.8.1
         hooks:
               - id: flake8
+                alias: flake8
+                name: flake8
+                args: ["--config=python/.flake8"]
+                types: [python]
       - repo: https://gitlab.com/pycqa/flake8
-        rev: 3.7.7
+        rev: 3.8.1
         hooks:
               - id: flake8
                 alias: flake8-cython

ci/checks/style.sh

@@ -22,7 +22,7 @@ BLACK=`black --check python`
 BLACK_RETVAL=$?
 
 # Run flake8 and get results/return code
-FLAKE=`flake8 python`
+FLAKE=`flake8 --config=python/.flake8 python`
 FLAKE_RETVAL=$?
 
 # Run flake8-cython and get results/return code
@@ -78,4 +78,4 @@ RETVALS=($ISORT_RETVAL $BLACK_RETVAL $FLAKE_RETVAL $FLAKE_CYTHON_RETVAL $CLANG_F
 IFS=$'\n'
 RETVAL=`echo "${RETVALS[*]}" | sort -nr | head -n1`
 
-exit $RETVAL
+exit $RETVAL

python/.flake8

@@ -0,0 +1,10 @@
+# Copyright (c) 2018, NVIDIA CORPORATION.
+
+[flake8]
+exclude = __init__.py
+ignore =
+    # line break before binary operator
+    W503
+    # whitespace before :
+    E203
+

python/setup.cfg

@@ -12,14 +12,6 @@ versionfile_build = rmm/_version.py
 tag_prefix = v
 parentdir_prefix = rmm-
 
-[flake8]
-exclude = __init__.py
-ignore =
-    # line break before binary operator
-    W503
-    # whitespace before :
-    E203
-
 [isort]
 line_length=79
 multi_line_output=3

python/setup.py

@@ -27,7 +27,7 @@
 
 if not os.path.isdir(CUDA_HOME):
     raise OSError(
-        f"Invalid CUDA_HOME: " f"directory does not exist: {CUDA_HOME}"
+        "Invalid CUDA_HOME: " f"directory does not exist: {CUDA_HOME}"
     )
 
 cuda_include_dir = os.path.join(CUDA_HOME, "include")