freebsd-dev/sys/conf/newvers.sh
Ed Maste 484df459f0 newvers: Honour SOURCE_DATE_EPOCH as a build reproducibility measure
One reason the kernel does not build reproducibly is that it includes
a timestamp in the version string. SOURCE_DATE_EPOCH provides a standard
method to address this: it should be set to the last modification time
of the source, and build processes use the specified timestamp instead
of the "current" date and time.

This change uses SOURCE_DATE_EPOCH if it is set; how it gets set needs
to be addressed elsewhere.

Reviewed by:	bapt
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2015-12-03 12:17:09 +00:00

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#!/bin/sh -
#
# Copyright (c) 1984, 1986, 1990, 1993
# The Regents of the University of California. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 4. Neither the name of the University nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#)newvers.sh 8.1 (Berkeley) 4/20/94
# $FreeBSD$
TYPE="FreeBSD"
REVISION="11.0"
BRANCH="CURRENT"
if [ -n "${BRANCH_OVERRIDE}" ]; then
BRANCH=${BRANCH_OVERRIDE}
fi
RELEASE="${REVISION}-${BRANCH}"
VERSION="${TYPE} ${RELEASE}"
if [ -z "${SYSDIR}" ]; then
SYSDIR=$(dirname $0)/..
fi
if [ -n "${PARAMFILE}" ]; then
RELDATE=$(awk '/__FreeBSD_version.*propagated to newvers/ {print $3}' \
${PARAMFILE})
else
RELDATE=$(awk '/__FreeBSD_version.*propagated to newvers/ {print $3}' \
${SYSDIR}/sys/param.h)
fi
b=share/examples/etc/bsd-style-copyright
if [ -r "${SYSDIR}/../COPYRIGHT" ]; then
year=$(sed -Ee '/^Copyright .* The FreeBSD Project/!d;s/^.*1992-([0-9]*) .*$/\1/g' ${SYSDIR}/../COPYRIGHT)
else
year=$(date +%Y)
fi
# look for copyright template
for bsd_copyright in ../$b ../../$b ../../../$b /usr/src/$b /usr/$b
do
if [ -r "$bsd_copyright" ]; then
COPYRIGHT=`sed \
-e "s/\[year\]/1992-$year/" \
-e 's/\[your name here\]\.* /The FreeBSD Project./' \
-e 's/\[your name\]\.*/The FreeBSD Project./' \
-e '/\[id for your version control system, if any\]/d' \
$bsd_copyright`
break
fi
done
# no copyright found, use a dummy
if [ -z "$COPYRIGHT" ]; then
COPYRIGHT="/*-
* Copyright (c) 1992-$year The FreeBSD Project.
* All rights reserved.
*
*/"
fi
# add newline
COPYRIGHT="$COPYRIGHT
"
# VARS_ONLY means no files should be generated, this is just being
# included.
if [ -n "$VARS_ONLY" ]; then
return 0
fi
LC_ALL=C; export LC_ALL
if [ ! -r version ]
then
echo 0 > version
fi
touch version
v=`cat version` u=${USER:-root} d=`pwd` h=${HOSTNAME:-`hostname`}
if [ -n "$SOURCE_DATE_EPOCH" ]; then
if ! t=`date -r $SOURCE_DATE_EPOCH 2>/dev/null`; then
echo "Invalid SOURCE_DATE_EPOCH" >&2
exit 1
fi
else
t=`date`
fi
i=`${MAKE:-make} -V KERN_IDENT`
compiler_v=$($(${MAKE:-make} -V CC) -v 2>&1 | grep -w 'version')
for dir in /usr/bin /usr/local/bin; do
if [ ! -z "${svnversion}" ] ; then
break
fi
if [ -x "${dir}/svnversion" ] && [ -z ${svnversion} ] ; then
# Run svnversion from ${dir} on this script; if return code
# is not zero, the checkout might not be compatible with the
# svnversion being used.
${dir}/svnversion $(realpath ${0}) >/dev/null 2>&1
if [ $? -eq 0 ]; then
svnversion=${dir}/svnversion
break
fi
fi
done
if [ -z "${svnversion}" ] && [ -x /usr/bin/svnliteversion ] ; then
/usr/bin/svnliteversion $(realpath ${0}) >/dev/null 2>&1
if [ $? -eq 0 ]; then
svnversion=/usr/bin/svnliteversion
else
svnversion=
fi
fi
for dir in /usr/bin /usr/local/bin; do
if [ -x "${dir}/p4" ] && [ -z ${p4_cmd} ] ; then
p4_cmd=${dir}/p4
fi
done
if [ -d "${SYSDIR}/../.git" ] ; then
for dir in /usr/bin /usr/local/bin; do
if [ -x "${dir}/git" ] ; then
git_cmd="${dir}/git --git-dir=${SYSDIR}/../.git"
break
fi
done
fi
if [ -d "${SYSDIR}/../.hg" ] ; then
for dir in /usr/bin /usr/local/bin; do
if [ -x "${dir}/hg" ] ; then
hg_cmd="${dir}/hg -R ${SYSDIR}/.."
break
fi
done
fi
if [ -n "$svnversion" ] ; then
svn=`cd ${SYSDIR} && $svnversion 2>/dev/null`
case "$svn" in
[0-9]*) svn=" r${svn}" ;;
*) unset svn ;;
esac
fi
if [ -n "$git_cmd" ] ; then
git=`$git_cmd rev-parse --verify --short HEAD 2>/dev/null`
svn=`$git_cmd svn find-rev $git 2>/dev/null`
if [ -n "$svn" ] ; then
svn=" r${svn}"
git="=${git}"
else
svn=`$git_cmd log | fgrep 'git-svn-id:' | head -1 | \
sed -n 's/^.*@\([0-9][0-9]*\).*$/\1/p'`
if [ -z "$svn" ] ; then
svn=`$git_cmd log --format='format:%N' | \
grep '^svn ' | head -1 | \
sed -n 's/^.*revision=\([0-9][0-9]*\).*$/\1/p'`
fi
if [ -n "$svn" ] ; then
svn=" r${svn}"
git="+${git}"
else
git=" ${git}"
fi
fi
git_b=`$git_cmd rev-parse --abbrev-ref HEAD`
if [ -n "$git_b" ] ; then
git="${git}(${git_b})"
fi
if $git_cmd --work-tree=${SYSDIR}/.. diff-index \
--name-only HEAD | read dummy; then
git="${git}-dirty"
fi
fi
if [ -n "$p4_cmd" ] ; then
p4version=`cd ${SYSDIR} && $p4_cmd changes -m1 "./...#have" 2>&1 | \
awk '{ print $2 }'`
case "$p4version" in
[0-9]*)
p4version=" ${p4version}"
p4opened=`cd ${SYSDIR} && $p4_cmd opened ./... 2>&1`
case "$p4opened" in
File*) ;;
//*) p4version="${p4version}+edit" ;;
esac
;;
*) unset p4version ;;
esac
fi
if [ -n "$hg_cmd" ] ; then
hg=`$hg_cmd id 2>/dev/null`
svn=`$hg_cmd svn info 2>/dev/null | \
awk -F': ' '/Revision/ { print $2 }'`
if [ -n "$svn" ] ; then
svn=" r${svn}"
fi
if [ -n "$hg" ] ; then
hg=" ${hg}"
fi
fi
cat << EOF > vers.c
$COPYRIGHT
#define SCCSSTR "@(#)${VERSION} #${v}${svn}${git}${hg}${p4version}: ${t}"
#define VERSTR "${VERSION} #${v}${svn}${git}${hg}${p4version}: ${t}\\n ${u}@${h}:${d}\\n"
#define RELSTR "${RELEASE}"
char sccs[sizeof(SCCSSTR) > 128 ? sizeof(SCCSSTR) : 128] = SCCSSTR;
char version[sizeof(VERSTR) > 256 ? sizeof(VERSTR) : 256] = VERSTR;
char compiler_version[] = "${compiler_v}";
char ostype[] = "${TYPE}";
char osrelease[sizeof(RELSTR) > 32 ? sizeof(RELSTR) : 32] = RELSTR;
int osreldate = ${RELDATE};
char kern_ident[] = "${i}";
EOF
echo $((v + 1)) > version