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#!/bin/sh
# Copyright (c) 2012-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
if [ $# -gt 1 ]; then
cd "$2"
fi
if [ $# -gt 0 ]; then
FILE="$1"
shift
if [ -f "$FILE" ]; then
INFO="$(head -n 1 "$FILE")"
fi
else
echo "Usage: $0 <filename> <srcroot>"
exit 1
fi
DESC=""
SUFFIX=""
if [ -e "$(which git 2>/dev/null)" -a "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = "true" ]; then
# clean 'dirty' status of touched files that haven't been modified
git diff >/dev/null 2>/dev/null
# if latest commit is tagged and not dirty, then override using the tag name
RAWDESC=$(git describe --abbrev=0 2>/dev/null)
if [ "$(git rev-parse HEAD)" = "$(git rev-list -1 $RAWDESC 2>/dev/null)" ]; then
git diff-index --quiet HEAD -- && DESC=$RAWDESC
fi
# otherwise generate suffix from git, i.e. string like "59887e8-dirty"
SUFFIX=$(git rev-parse --short HEAD)
git diff-index --quiet HEAD -- || SUFFIX="$SUFFIX-dirty"
fi
if [ -n "$DESC" ]; then
NEWINFO="#define BUILD_DESC \"$DESC\""
elif [ -n "$SUFFIX" ]; then
NEWINFO="#define BUILD_SUFFIX $SUFFIX"
else
NEWINFO="// No build information available"
fi
# only update build.h if necessary
if [ "$INFO" != "$NEWINFO" ]; then
echo "$NEWINFO" >"$FILE"
fi