configure pre-commit

.pre-commit-config.yaml

@@ -0,0 +1,30 @@
+repos:
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.11.0
+    hooks:
+      - id: pyupgrade
+        args:
+          - --keep-percent-format
+
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.9.0
+    hooks:
+      - id: flake8
+
+  - repo: https://github.com/asottile/yesqa
+    rev: v1.2.2
+    hooks:
+      - id: yesqa
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: check-yaml
+      - id: mixed-line-ending

.travis.yml

@@ -24,11 +24,9 @@ matrix:
       env: TOX_ENV=tests
     - python: 3.9
       env: TOX_ENV=tests
-    - env: TOX_ENV=black
     - env: TOX_ENV=mypy
     - env: TOX_ENV=apidocs
     - env: PUSH_DOCS=true
-    - env: TOX_ENV=check-manifest
 
 script:
   - if [[ -n "${TOX_ENV}" ]]; then tox -e $TOX_ENV; fi

setup.cfg

@@ -48,3 +48,8 @@ mypy =
 
 [bdist_wheel]
 universal = 1
+
+[flake8]
+max-line-length = 88
+extend-ignore =
+   E203,  # whitespace before : is not PEP8 compliant (& conflicts with black)

tox.ini

@@ -7,7 +7,6 @@ isolated_build = true
 envlist =
     flake8,
     tests,
-    check-manifest,
     apidocs
 
 
@@ -17,25 +16,18 @@ wheel_build_env = build
 deps =
     tests: coverage
     apidocs: pydoctor
-    check-manifest: check-manifest
-    black: black
-    black-reformat: black
+    lint: pre-commit
 extras =
     mypy: mypy
     tests: scripts
 
-setenv =
-    black: BLACK_LINT_ARGS=--check
-
 commands =
     python -V
 
-    black: black {env:BLACK_LINT_ARGS} .
+    lint: pre-commit run --all-files --show-diff-on-failure
 
     apidocs: pydoctor -q --project-name incremental src/incremental
 
-    check-manifest: check-manifest -v
-
     tests: coverage --version
     tests: {envbindir}/trial --version
     tests: coverage erase
@@ -47,10 +39,6 @@ commands =
     tests: coverage html
     mypy: mypy src
 
-[testenv:black-reformat]
-setenv =
-; Clear the --check flag
-    BLACK_LINT_ARGS=
 
 [testenv:build]
 # empty environment to build universal wheel once per tox invocation