Add pre-commit

.github/workflows/lint.yml

@@ -0,0 +1,27 @@
+name: Lint
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.x"
+
+      - uses: pre-commit/action@v3.0.1

.pre-commit-config.yaml

@@ -0,0 +1,16 @@
+repos:
+  - repo: https://github.com/psf/black
+    rev: 24.10.0
+    hooks:
+      - id: black
+        language_version: python3
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+      - id: check-merge-conflict
+      - id: mixed-line-ending

iconvcodec.py

@@ -81,10 +81,11 @@ def _iconv_decode_impl(decoder, msg, errors, bufsize=None):
 
 def codec_factory(encoding):
     # Workaround for https://github.com/bodograumann/python-iconv/issues/4
-    _encoding = encoding \
-        .replace("_translit", "//TRANSLIT") \
-        .replace("_ignore", "//IGNORE") \
+    _encoding = (
+        encoding.replace("_translit", "//TRANSLIT")
+        .replace("_ignore", "//IGNORE")
         .replace("_non_identical_discard", "//NON_IDENTICAL_DISCARD")
+    )
 
     encoder = iconv.open(_encoding, "utf-8")
     decoder = iconv.open("utf-8", _encoding)

setup.py

@@ -3,7 +3,7 @@
 
 # On Linux, iconv is part of glibc and doesn't need separate linkage
 # Otherwise, link against libiconv
-if sys.platform.startswith('linux'):
+if sys.platform.startswith("linux"):
     libraries = []
 else:
     libraries = ["iconv"]