add isort

Signed-off-by: Filipe Laíns <lains@archlinux.org>

Author: FFY00

.github/workflows/checks.yml

@@ -47,3 +47,21 @@ jobs:
     - name: Run flake8
       run: flake8 --show-source --statistics install
 
+  isort:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v1
+
+    - name: Set up Python
+      uses: actions/setup-python@v1
+
+    - name: Install flake8
+      run: |
+        pip install --upgrade pip
+        pip install isort
+        isort --version
+
+    - name: Run isort
+      run: isort --check-only --diff --recursive install
+

install/__init__.py

@@ -8,8 +8,8 @@
 import compileall
 import configparser
 import logging
-import pickle
 import os
+import pickle
 import re
 import shutil
 import sys

install/__main__.py

@@ -7,16 +7,19 @@
 import os
 import shutil
 import sys
-import warnings
 import traceback
 import typing
+import warnings
 
 from typing import Optional, TextIO
 
+# isort:maintain_block
 if False:  # TYPE_CHECKING
     from typing import Type  # not in 3.5.{0,1}
+# isort:end_maintain_block
+
 
-from . import build, install, InstallException, IncompleteInstallationWarning
+from . import IncompleteInstallationWarning, InstallException, build, install  # isort:skip # until isort 5.0.0
 
 
 logger = logging.getLogger('install.main')

setup.cfg

@@ -5,3 +5,7 @@ max-complexity = 10
 [mypy]
 ignore_missing_imports = True
 strict = True
+
+[isort]
+line_length = 127
+lines_between_types = 1