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#!/usr/bin/env bash
#
# Copyright (c) 2017-2019 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.
export LC_ALL=C
while getopts "?" opt; do
case $opt in
?)
echo "Usage: $0 [N]"
echo " COMMIT_RANGE='<commit range>' $0"
echo " $0 -?"
echo "Checks unstaged changes, the previous N commits, or a commit range."
echo "COMMIT_RANGE='47ba2c3...ee50c9e' $0"
exit 0
;;
esac
done
if [ -z "${COMMIT_RANGE}" ]; then
if [ -n "$1" ]; then
COMMIT_RANGE="HEAD~$1...HEAD"
else
# This assumes that the target branch of the pull request will be master.
MERGE_BASE=$(git merge-base HEAD master)
COMMIT_RANGE="$MERGE_BASE..HEAD"
fi
fi
showdiff() {
if ! git diff -U0 "${COMMIT_RANGE}" -- "." ":(exclude)depends/patches/" ":(exclude)src/leveldb/" ":(exclude)src/crc32c/" ":(exclude)src/secp256k1/" ":(exclude)src/univalue/" ":(exclude)doc/release-notes/" ":(exclude)src/qt/locale/"; then
echo "Failed to get a diff"
exit 1
fi
}
showcodediff() {
if ! git diff -U0 "${COMMIT_RANGE}" -- *.cpp *.h *.md *.py *.sh ":(exclude)src/leveldb/" ":(exclude)src/crc32c/" ":(exclude)src/secp256k1/" ":(exclude)src/univalue/" ":(exclude)doc/release-notes/" ":(exclude)src/qt/locale/"; then
echo "Failed to get a diff"
exit 1
fi
}
RET=0
# Check if trailing whitespace was found in the diff.
if showdiff | grep -E -q '^\+.*\s+$'; then
echo "This diff appears to have added new lines with trailing whitespace."
echo "The following changes were suspected:"
FILENAME=""
SEEN=0
SEENLN=0
while read -r line; do
if [[ "$line" =~ ^diff ]]; then
FILENAME="$line"
SEEN=0
elif [[ "$line" =~ ^@@ ]]; then
LINENUMBER="$line"
SEENLN=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
if [ "$SEENLN" -eq 0 ]; then
echo "$LINENUMBER"
SEENLN=1
fi
echo "$line"
fi
done < <(showdiff | grep -E '^(diff --git |@@|\+.*\s+$)')
RET=1
fi
# Check if tab characters were found in the diff.
if showcodediff | perl -nle '$MATCH++ if m{^\+.*\t}; END{exit 1 unless $MATCH>0}' > /dev/null; then
echo "This diff appears to have added new lines with tab characters instead of spaces."
echo "The following changes were suspected:"
FILENAME=""
SEEN=0
SEENLN=0
while read -r line; do
if [[ "$line" =~ ^diff ]]; then
FILENAME="$line"
SEEN=0
elif [[ "$line" =~ ^@@ ]]; then
LINENUMBER="$line"
SEENLN=0
else
if [ "$SEEN" -eq 0 ]; then
# The first time a file is seen with a tab character, we print the
# filename (preceded by a newline).
echo
echo "$FILENAME"
SEEN=1
fi
if [ "$SEENLN" -eq 0 ]; then
echo "$LINENUMBER"
SEENLN=1
fi
echo "$line"
fi
done < <(showcodediff | perl -nle 'print if m{^(diff --git |@@|\+.*\t)}')
RET=1
fi
exit $RET
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