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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Using GitPython inside a pre-commit hook breaks (GIT_AUTHOR_DATE breaks)","articleBody":"I suspect the culprit of the crash is the GIT_AUTHOR_DATE. If I remove this before starting my script it works. I already pass `expand_vars=False`, but that isn't passed far enough down to make a differance.\r\n\r\nMy current workaround is to nulke the enviroment variables when invoking my script by using `env -i \u003cscript\u003e` from the commit hook.\r\n\r\nMy ideal solution would be a flag to disable the copy of the os environ on [git/cmd.py:699](https://github.com/gitpython-developers/GitPython/blob/master/git/cmd.py#L699). This will not only eliminate this issue, but also any potential other interferance (think GIT_DIR and friends).\r\n\r\nReplicate via:\r\n\r\n``` bash\r\nexport GIT_INDEX_FILE='.git/index'\r\nexport GIT_AUTHOR_DATE='@1574863356 +0100'\r\nexport GIT_EXEC_PATH='/usr/lib/git-core'\r\nexport GIT_AUTHOR_EMAIL='admin@dries007.net'\r\nexport GIT_PREFIX=''\r\nexport GIT_AUTHOR_NAME='Dries'\r\n\r\npython3\r\n```\r\n\r\n```python\r\nimport tempfile\r\n\r\nimport git\r\n\r\n\r\ndef main():\r\n    with tempfile.TemporaryDirectory() as folder:\r\n        repo = git.Repo.init(folder, expand_vars=False)\r\n        repo.index.commit(\"Init test repo with empty commit.\")\r\n        repo.head.reference = repo.create_head(\"master\")\r\n\r\n\r\nif __name__ == \"__main__\":\r\n    main()\r\n```\r\n\r\nThanks,\r\nDries","author":{"url":"https://github.com/dries007","@type":"Person","name":"dries007"},"datePublished":"2019-11-27T14:23:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/963/GitPython/issues/963"}