在 Git hook 中获取提交消息

我想在 Git 提交之前检查提交消息。

我使用预提交挂钩来执行此操作，但我找不到在中获取提交消息的方法.git/预提交脚本。 我怎样才能得到它？

In the pre-commit hook, the commit message usually hasn't been created yet ¹. You probably want to use one of the prepare-commit-msg or commit-msg hooks instead. There's a nice section in Pro Git http://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks on the order in which these hooks are run, and what you typically might do with them.

_{1. The exception is that the committer might have supplied a commit message with -m, but the message still isn't accessible to the pre-commit hook, whereas it is to prepare-commit-msg or commit-msg}