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#!/bin/sh
# Copyright (c) 2017-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
# This simple script checks for commits beginning with: scripted-diff:
# If found, looks for a script between the lines -BEGIN VERIFY SCRIPT- and
# -END VERIFY SCRIPT-. If no ending is found, it reads until the end of the
# commit message.
# The resulting script should exactly transform the previous commit into the current
# one. Any remaining diff signals an error.
export LC_ALL=C
if test -z "$1"; then
echo "Usage: $0 <commit>..."
exit 1
fi
if ! sed --help 2>&1 | grep -q 'GNU'; then
echo "Error: the installed sed package is not compatible. Please make sure you have GNU sed installed in your system.";
exit 1;
fi
if ! grep --help 2>&1 | grep -q 'GNU'; then
echo "Error: the installed grep package is not compatible. Please make sure you have GNU grep installed in your system.";
exit 1;
fi
RET=0
PREV_BRANCH=$(git name-rev --name-only HEAD)
PREV_HEAD=$(git rev-parse HEAD)
for commit in $(git rev-list --reverse "$1"); do
if git rev-list -n 1 --pretty="%s" "$commit" | grep -q "^scripted-diff:"; then
git checkout --quiet "$commit"^ || exit
SCRIPT="$(git rev-list --format=%b -n1 "$commit" | sed '/^-BEGIN VERIFY SCRIPT-$/,/^-END VERIFY SCRIPT-$/{//!b};d')"
if test -z "$SCRIPT"; then
echo "Error: missing script for: $commit"
echo "Failed"
RET=1
else
echo "Running script for: $commit"
echo "$SCRIPT"
(eval "$SCRIPT")
git --no-pager diff --exit-code "$commit" && echo "OK" || (echo "Failed"; false) || RET=1
fi
git reset --quiet --hard HEAD
else
if git rev-list "--format=%b" -n1 "$commit" | grep -q '^-\(BEGIN\|END\)[ a-zA-Z]*-$'; then
echo "Error: script block marker but no scripted-diff in title of commit $commit"
echo "Failed"
RET=1
fi
fi
done
git checkout --quiet "$PREV_BRANCH" 2>/dev/null || git checkout --quiet "$PREV_HEAD"
exit $RET
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