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#!/bin/sh
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#
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# Git hook script to verify what is about to be committed.
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# Checks that the changes don't introduce new flake8 errors.
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TMPDIFF=`tempfile`
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FLAKE8="`git rev-parse --show-toplevel`/bin/flake8"
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status=0
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# select only changed python files which are not migrations
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changed=`git diff --cached --name-only | grep 'py$' | grep -v 'migrations/[0-9]'`
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if [ -z $changed ] ; then
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# Nothing to check. Note the exit is necessary -- we would not pass any
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# paths to git diff below and it would output the diff unfiltered.
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exit 0
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fi
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git diff --unified=1 --cached HEAD -- $changed > $TMPDIFF
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# only do the check when there are some changes to be commited
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# otherwise flake8 would hang waiting for input
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if [ -s $TMPDIFF ] ; then
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cat $TMPDIFF | $FLAKE8 --diff
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status=$?
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fi
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rm -f $TMPDIFF
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exit $status
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