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#!/bin/sh
# 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.
# 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 "x$1" = "x"; then
echo "Usage: $0 <commit>..."
exit 1
fi
RET=0
PREV_BRANCH=`git name-rev --name-only HEAD`
PREV_HEAD=`git rev-parse HEAD`
for i in `git rev-list --reverse $1`; do
if git rev-list -n 1 --pretty="%s" $i | grep -q "^scripted-diff:"; then
git checkout --quiet $i^ || exit
SCRIPT="`git rev-list --format=%b -n1 $i | sed '/^-BEGIN VERIFY SCRIPT-$/,/^-END VERIFY SCRIPT-$/{//!b};d'`"
if test "x$SCRIPT" = "x"; then
echo "Error: missing script for: $i"
echo "Failed"
RET=1
else
echo "Running script for: $i"
echo "$SCRIPT"
eval "$SCRIPT"
git --no-pager diff --exit-code $i && echo "OK" || (echo "Failed"; false) || RET=1
fi
git reset --quiet --hard HEAD
else
if git rev-list "--format=%b" -n1 $i | grep -q '^-\(BEGIN\|END\)[ a-zA-Z]*-$'; then
echo "Error: script block marker but no scripted-diff in title"
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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