bitcoin/share/genbuild.sh

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#!/bin/sh
# Copyright (c) 2012-2021 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
export LC_ALL=C
if [ $# -gt 1 ]; then
cd "$2" || exit 1
fi
if [ $# -gt 0 ]; then
FILE="$1"
shift
if [ -f "$FILE" ]; then
INFO="$(head -n 1 "$FILE")"
fi
else
echo "Usage: $0 <filename> <srcroot>"
exit 1
fi
# This checks that we are actually part of the intended git repository, and not just getting info about some unrelated git repository that the code happens to be in a directory under
git_check_in_repo() {
! { git status --porcelain -uall --ignored "$@" 2>/dev/null || echo '??'; } | grep -q '?'
}
GIT_TAG=""
GIT_COMMIT=""
if [ "${BITCOIN_GENBUILD_NO_GIT}" != "1" ] && [ -e "$(command -v git)" ] && [ "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = "true" ] && git_check_in_repo share/genbuild.sh; then
# clean 'dirty' status of touched files that haven't been modified
git diff >/dev/null 2>/dev/null
# if latest commit is tagged and not dirty, then override using the tag name
RAWDESC=$(git describe --abbrev=0 2>/dev/null)
if [ "$(git rev-parse HEAD)" = "$(git rev-list -1 "$RAWDESC" 2>/dev/null)" ]; then
git diff-index --quiet HEAD -- && GIT_TAG=$RAWDESC
fi
# otherwise generate suffix from git, i.e. string like "59887e8-dirty"
GIT_COMMIT=$(git rev-parse --short=12 HEAD)
git diff-index --quiet HEAD -- || GIT_COMMIT="$GIT_COMMIT-dirty"
fi
if [ -n "$GIT_TAG" ]; then
NEWINFO="#define BUILD_GIT_TAG \"$GIT_TAG\""
elif [ -n "$GIT_COMMIT" ]; then
NEWINFO="#define BUILD_GIT_COMMIT \"$GIT_COMMIT\""
else
# NOTE: The NEWINFO line below this comment gets replaced by a string-match in contrib/guix/libexec/make_release_tarball.sh
# If changing it, update the script too!
NEWINFO='// No build information available'
fi
# only update build.h if necessary
if [ "$INFO" != "$NEWINFO" ]; then
echo "$NEWINFO" >"$FILE"
fi