My .git/hooks/pre-commit - save yourself from embarassment using pyflakes

pre-commit

#!/bin/bash
# Original version (C) 2011 by jonasvp
# Modified version by danwerner

# Save this file as .git/hooks/pre-commit, make it executable, and it will
# thank you by saving you from common mistakes *before* deployment.

# Conflict markers
git diff --cached --diff-filter=ACMR | awk '/\+(<<<[<]<<<|>>>[>]>>>|===[=]===$)/ { exit 1 }'
CODE=$?
if [ "$CODE" != "0" ]; then
    echo "COMMIT ABORTED: Conflict markers found." >&2
    exit $CODE
fi

# Pyflakes
TMPDIR=`mktemp -d`
TMPFILE=`mktemp`
git diff --cached --name-only --diff-filter=ACMR | xargs git checkout-index --prefix=$TMPDIR/ --
pyflakes $TMPDIR >$TMPFILE 2>&1
grep -v "unable to detect undefined names" $TMPFILE >$TMPFILE.2
egrep -v "migrations.*'(datetime|models)' imported but unused" $TMPFILE.2 >$TMPFILE

# PDB breakpoints
grep -rn "pdb.set_trace" $TMPDIR >>$TMPFILE
sed "s/^${TMPDIR//\//.}.//" $TMPFILE >$TMPFILE.2
mv $TMPFILE.2 $TMPFILE
CODE=0
OUTPUT=`cat $TMPFILE`
if [ -n "$OUTPUT" ]; then
    cat $TMPFILE >&2
    echo "COMMIT ABORTED: Python programming errors detected." >&2
    CODE=1
fi
rm -Rf $TMPDIR $TMPFILE
exit $CODE