git-hook-library

An exceptionally small collection of git hooks.

pre-commit hooks

• pre-commit.no-tabs

  Reject commits which contain tabs (based on git config hooks.allowtabs)

  Designed as an answer to a StackOverflow question.

  Since git 1.7.2 you can use core.whitespace=tab-in-indent to detect tabs used for indentation (though not tabs embedded in the line). See stackoverflow.