create poetry-export hook

.pre-commit-hooks.yaml

@@ -0,0 +1,5 @@
+- id: poetry-export
+  name: poetry export
+  description: pre-commit hook to keep requirements.txt updated
+  entry: poetry-export
+  language: python

README.md

@@ -1,2 +1,5 @@
 # pre-commit-poetry-export
-Pre-commit hook to keep requirements.txt updated
+pre-commit hook to keep requirements.txt updated
+
+- [] write readme
+- [] test

pre_commit_poetry_export/__init__.py

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+__version__ = '0.1.0'

pre_commit_poetry_export/poetry_export.py

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+import hashlib
+import os
+
+
+def main(argv=None):
+    os.system('cp requirements.txt old.requirements.txt')
+    os.system('poetry export -f requirements.txt > requirements.txt')
+
+    with open('requirements.txt', 'r') as new,\
+            open('old.requirements.txt', 'r') as old:
+        new_content = new.read()
+        new.close()
+        new_md5 = hashlib.md5()
+        new_md5.update(new_content.encode('utf-8'))
+
+        old_content = old.read()
+        old.close()
+        old_md5 = hashlib.md5()
+        old_md5.update(old_content.encode('utf-8'))
+
+    if new_md5.hexdigest() == old_md5.hexdigest():
+        os.system('rm old.requirements.txt')
+        return 0
+
+    print('requirements.txt updated!')
+    return 1
+
+
+if __name__ == '__name__':
+    exit(main())

pyproject.toml

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+[tool.poetry]
+name = "pre-commit-poetry-export"
+version = "0.1.1"
+description = "pre-commit hook to keep requirements.txt updated"
+authors = ["Antonio Luckwu <[email protected]>"]
+license = "MIT"
+readme = "README.md"
+homepage = "https://github.com/avlm/pre-commit-poetry-export"
+repository = "https://github.com/avlm/pre-commit-poetry-export"
+keywords = ["pre-commit", "hook", "poetry", "export", "pip", "requirements", "requirements.txt"]
+classifiers = [
+	"Environment :: Console",
+	"Operating System :: OS Independent",
+	"Topic :: Software Development :: Libraries :: Python Modules",
+]
+include = [
+	"LICENSE",
+]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+
+[tool.poetry.dev-dependencies]
+pytest = "^5.2"
+flake8 = "^3.8.3"
+
+[tool.poetry.scripts]
+poetry-export = 'pre_commit_poetry_export.poetry_export:main'
+
+[build-system]
+requires = ["poetry>=0.12"]
+build-backend = "poetry.masonry.api"

tests/test_pre_commit_poetry_export.py

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+from pre_commit_poetry_export import __version__
+
+
+def test_version():
+    assert __version__ == '0.1.0'