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#!/bin/bash
#
# Copyright (c) 2017 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Check for new lines in diff that introduce trailing whitespace.
# We can't run this check unless we know the commit range for the PR.
if [ -z "${TRAVIS_COMMIT_RANGE}" ]; then
exit 0
fi
showdiff() {
if ! git diff -U0 "${TRAVIS_COMMIT_RANGE}" --; then
echo "Failed to get a diff"
exit 1
fi
}
# Do a first pass, and if no trailing whitespace was found then exit early.
if ! showdiff | grep -E -q '^\+.*\s+$'; then
exit
fi
echo "This diff appears to have added new lines with trailing whitespace."
echo "The following changes were suspected:"
FILENAME=""
SEEN=0
while read -r line; do
if [[ "$line" =~ ^diff ]]; then
FILENAME="$line"
SEEN=0
else
if [ "$SEEN" -eq 0 ]; then
# The first time a file is seen with trailing whitespace, we print the
# filename (preceded by a newline).
echo
echo "$FILENAME"
SEEN=1
fi
echo "$line"
fi
done < <(showdiff | grep -E '^(diff --git |\+.*\s+$)')
exit 1
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