pyflakes-hook.sh

#!/bin/sh
# Run pyflakes on all changed .py files before commit.
#
# By David Warde-Farley, Feb 28, 2013 -- released under the 3-clause BSD license.
#
# To use, run this file from the script .git/hooks/pre-commit

FILES=`git diff --staged --name-status |grep '\.py$' |grep '^[AM]' |sed -e's/^[AM]\s\+//'`
ROOT=`git rev-parse --show-toplevel`
NUM_BAD_FILES=0

for fn in $FILES; do
        pyflakes $ROOT/$fn
        STATUS=$?
        if [ $STATUS ]; then
                NUM_BAD_FILES=`expr $NUM_BAD_FILES + 1`
        fi
done
if [ $NUM_BAD_FILES -gt 0 ]; then
        echo "! Aborting commit; pyflakes errors in $NUM_BAD_FILES staged file(s)."
        exit $NUM_BAD_FILES
fi