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newvers.sh: add option to eliminate kernel build metadata

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Build metadata (username, hostname, etc.) prevents the FreeBSD kernel
from building reproducibly. Add an option to disable inclusion of that
metadata but retain the release information and SVN/git VCS details.
See https://reproducible-builds.org/ for additional background.

Reviewed by:	bapt
Obtained from:	NetBSD
MFC after:	1 month
Sponsored by:	Reproducible Builds World Summit 2, Berlin
Differential Revision:	https://reviews.freebsd.org/D4347
This commit is contained in:
emaste 2016-12-15 12:57:03 +00:00
parent d828ed76b5
commit 8b9ac4e4a6
1 changed files with 28 additions and 2 deletions
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30
sys/conf/newvers.sh
View File

@ -30,6 +30,14 @@
# @(#)newvers.sh 8.1 (Berkeley) 4/20/94
# $FreeBSD$
# Command line options:
#
# -r Reproducible build. Do not embed directory names, user
# names, time stamps or other dynamic information into
# the outuput file. This is intended to allow two builds
# done at different times and even by different people on
# different hosts to produce identical output.
TYPE="FreeBSD"
REVISION="12.0"
BRANCH="CURRENT"
@ -250,10 +258,28 @@ if [ -n "$hg_cmd" ] ; then
fi
fi
include_metadata=true
while getopts r opt; do
case "$opt" in
r)
include_metadata=
;;
esac
done
shift $((OPTIND - 1))
if [ -z "${include_metadata}" ]; then
VERINFO="${VERSION} ${svn}${git}${hg}${p4version}"
VERSTR="${VERINFO}\\n"
else
VERINFO="${VERSION} #${v}${svn}${git}${hg}${p4version}: ${t}"
VERSTR="${VERINFO}\\n ${u}@${h}:${d}\\n"
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}:${d}\\n"
#define SCCSSTR "@(#)${VERINFO}"
#define VERSTR "${VERSTR}"
#define RELSTR "${RELEASE}"
char sccs[sizeof(SCCSSTR) > 128 ? sizeof(SCCSSTR) : 128] = SCCSSTR;