git pre-commit hook script to run pycodestyle to check for PEP-8 conformance

pre-commit

#!/bin/sh

# Is pycodestyle is installed?
which pycodestyle &> /dev/null

if [[ $? -ne 0 ]]; then
	cat <<-EOF
	pre-commit hook failed. pycodestyle is not installed.
	Run the following and try your commit again:
    	    pip install pycodestyle
	EOF
	exit 1
fi

# Run pycodestyle to check pep8 conformance.
pycodestyle

if [[ $? -ne 0 ]]; then
	echo pycodestyle failed in pre-commit hook.
	echo Fix errors and retry commit.
	exit 1
fi