Initial version

flake8_leading_blank_lines.py

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+import token
+
+__version__ = '1.0.1'
+
+
+def plugin(tree, file_tokens):
+    try:
+        first = file_tokens[0]
+    except IndexError:
+        return
+    if first.type == token.NL:
+        yield (
+            first.start[0],
+            first.start[1],
+            'LBL001: Blank line at start of file',
+            None
+        )
+
+
+plugin.name = 'flake8-leading-blank-lines'
+plugin.version = __version__

setup.cfg

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+[bdist_wheel]
+universal = 1

setup.py

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+import setuptools
+
+
+def get_version():
+    with open('flake8_leading_blank_lines.py') as f:
+        lines = [line.strip() for line in f if line.startswith('__version__')]
+
+    for line in lines:
+        _, versionstr = line.split('=', 1)
+        return versionstr.strip(' "\'')
+
+    raise Exception("__version__ not found in flake8_leading_blank_lines.py")
+
+
+with open("README.md", "r", encoding="utf-8") as fh:
+    long_description = fh.read()
+
+
+setuptools.setup(
+    name="flake8-leading-blank-lines",
+    license="MIT",
+    version=get_version(),
+    description="A flake8 plugin to detect blank lines at the start of a file",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    author="Baptiste Mispelon",
+    author_email="[email protected]",
+    url="https://github.com/bmispelon/flake8-leading-blank-lines",
+    project_urls={
+        "Bug Tracker": "https://github.com/bmispelon/flake8-leading-blank-lines/issues",
+    },
+    py_modules=["flake8_leading_blank_lines"],
+    install_requires=[
+        "flake8 > 3.0.0",
+    ],
+    entry_points={
+        'flake8.extension': [
+            'LBL001 = flake8_leading_blank_lines:plugin',
+        ],
+    },
+    classifiers=[
+        "Framework :: Flake8",
+        "Environment :: Console",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Topic :: Software Development :: Libraries :: Python Modules",
+        "Topic :: Software Development :: Quality Assurance",
+    ],
+)