# pre-commit

This program is a git pre-commit hook that runs an arbitrary set of
syntax, style, and complexity checks against files about to be checked
in.

pre-commit is a git-hook; you install it into your project's .git
directory in .git/hooks and make it executable.  It will run every time
you attempt to commit a collection of files, running the configured list
of linters against those files, and will terminate the check-in if any
of the files fails.

pre-commit uses the git-stash to temporarily store any changes you may
have made between your "git-add" and your "git-commit"; it therefore
checks against your *staged* files, not your *workspace* files.  Most
hooks do the wrong thing and assume your stage and workspace are the
same.  This is not necessarily so.

pre-commit is written in Hy, a Lisp-like dialect of Python.  I find Hy's
support for "cond", complex anonymous functions, and complex return
values highly appealing.  The UTF-8 handling in this script means it is
compatible only with Hy running atop Python3.

pre-commit is based on the pre-commit recommendations in Steve Pulec's
"Why you need a git-hook and why most are wrong" available at:
http://css.dzone.com/articles/why-your-need-git-pre-commit The changes
I've made reflect a different set of needs, different possible ways of
receiving error conditions, and a slightly nicer output.

If, while installing this, you encounter a problem, you must return your
git repository to its original pre-stash state.  Learn to use the
following commands correctly:

git stash list
git stash pop