Introduce ruff code checker and formatter

- make code formatting consistent
- discover issues like #6 earlier

.github/workflows/pre-commit.yml

@@ -0,0 +1,27 @@
+name: pre-commit check
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-24.04
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.13'
+    - uses: astral-sh/setup-uv@v4
+    - name: pre-commit
+      run: uvx pre-commit run --all
+      env:
+        RUFF_OUTPUT_FORMAT: github
+    - name: show diff
+      run: git diff
+      if: always()

.pre-commit-config.yaml

@@ -0,0 +1,9 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.8.0
+  hooks:
+  - id: ruff
+    args: [--fix, --exit-non-zero-on-fix]
+  - id: ruff-format

setup.py

@@ -1,21 +1,21 @@
 from setuptools import setup, find_packages
 
 setup(
-    name='altcha',
-    version='0.1.5',
-    description='A library for creating and verifying challenges for ALTCHA.',
-    long_description=open('README.md').read(),
-    long_description_content_type='text/markdown',
-    author='Daniel Regeci',
-    author_email='[email protected]',
-    url='https://github.com/altcha-org/altcha-lib-py',
+    name="altcha",
+    version="0.1.5",
+    description="A library for creating and verifying challenges for ALTCHA.",
+    long_description=open("README.md").read(),
+    long_description_content_type="text/markdown",
+    author="Daniel Regeci",
+    author_email="[email protected]",
+    url="https://github.com/altcha-org/altcha-lib-py",
     packages=find_packages(),
     classifiers=[
-        'Programming Language :: Python :: 3',
-        'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent',
+        "Programming Language :: Python :: 3",
+        "License :: OSI Approved :: MIT License",
+        "Operating System :: OS Independent",
     ],
-    python_requires='>=3.6',
+    python_requires=">=3.6",
     install_requires=[
         # Add any dependencies here
     ],

tests/test_altcha.py

@@ -19,7 +19,6 @@
 
 
 class TestALTCHA(unittest.TestCase):
-
     def setUp(self):
         self.hmac_key = "test-key"
 
@@ -90,7 +89,8 @@ def test_verify_solution_not_expired(self):
             hmac_key=self.hmac_key,
             salt="somesalt",
             number=123,
-            expires=datetime.datetime.now().astimezone() + datetime.timedelta(minutes=1)
+            expires=datetime.datetime.now().astimezone()
+            + datetime.timedelta(minutes=1),
         )
         challenge = create_challenge(options)
         payload = Payload(
@@ -114,7 +114,8 @@ def test_verify_solution_expired(self):
             hmac_key=self.hmac_key,
             salt="somesalt",
             number=123,
-            expires=datetime.datetime.now().astimezone() - datetime.timedelta(minutes=1)
+            expires=datetime.datetime.now().astimezone()
+            - datetime.timedelta(minutes=1),
         )
         challenge = create_challenge(options)
         payload = Payload(
@@ -138,14 +139,15 @@ def test_verify_solution_malformed_expiry(self):
             hmac_key=self.hmac_key,
             salt="somesalt",
             number=123,
-            expires=datetime.datetime.now().astimezone() + datetime.timedelta(minutes=1)
+            expires=datetime.datetime.now().astimezone()
+            + datetime.timedelta(minutes=1),
         )
         challenge = create_challenge(options)
         payload = Payload(
             algorithm="SHA-256",
             challenge=challenge.challenge,
             number=123,
-            salt='somesalt?expires=foobar',
+            salt="somesalt?expires=foobar",
             signature=challenge.signature,
         )
         payload_encoded = base64.b64encode(