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|
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# This scripts adds local version information from the version
# control system git.
#
# If something goes wrong, send a mail the kernel build mailinglist
# (see MAINTAINERS) and CC Nico Schottelius
# <nico-linuxsetlocalversion -at- schottelius.org>.
#
#
set -e
usage() {
echo "Usage: $0 [--no-local] [srctree]" >&2
exit 1
}
no_local=false
if test "$1" = "--no-local"; then
no_local=true
shift
fi
srctree=.
if test $# -gt 0; then
srctree=$1
shift
fi
if test $# -gt 0 -o ! -d "$srctree"; then
usage
fi
try_tag() {
tag="$1"
# Is $tag an annotated tag?
if [ "$(git cat-file -t "$tag" 2> /dev/null)" != tag ]; then
return
fi
# Is it an ancestor of HEAD, and if so, how many commits are in $tag..HEAD?
# shellcheck disable=SC2046 # word splitting is the point here
set -- $(git rev-list --count --left-right "$tag"...HEAD 2> /dev/null)
# $1 is 0 if and only if $tag is an ancestor of HEAD. Use
# string comparison, because $1 is empty if the 'git rev-list'
# command somehow failed.
if [ "$1" != 0 ]; then
return
fi
# $2 is the number of commits in the range $tag..HEAD, possibly 0.
count="$2"
}
scm_version()
{
local short=false
local no_dirty=false
local tag
while [ $# -gt 0 ];
do
case "$1" in
--short)
short=true;;
--no-dirty)
no_dirty=true;;
esac
shift
done
cd "$srctree"
if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then
return
fi
if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then
return
fi
# mainline kernel: 6.2.0-rc5 -> v6.2-rc5
# stable kernel: 6.1.7 -> v6.1.7
version_tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/')
# try_tag initializes count if the tag is usable.
count=
# If a localversion* file exists, and the corresponding
# annotated tag exists and is an ancestor of HEAD, use
# it. This is the case in linux-next.
if [ -n "${file_localversion#-}" ] ; then
try_tag "${file_localversion#-}"
fi
# Otherwise, if a localversion* file exists, and the tag
# obtained by appending it to the tag derived from
# KERNELVERSION exists and is an ancestor of HEAD, use
# it. This is e.g. the case in linux-rt.
if [ -z "${count}" ] && [ -n "${file_localversion}" ]; then
try_tag "${version_tag}${file_localversion}"
fi
# Otherwise, default to the annotated tag derived from KERNELVERSION.
if [ -z "${count}" ]; then
try_tag "${version_tag}"
fi
# If we are at the tagged commit, we ignore it because the
# version is well-defined. If none of the attempted tags exist
# or were usable, $count is still empty.
if [ -z "${count}" ] || [ "${count}" -gt 0 ]; then
# If only the short version is requested, don't bother
# running further git commands
if $short; then
echo "+"
return
fi
# If we are past the tagged commit, we pretty print it.
# (like 6.1.0-14595-g292a089d78d3)
if [ -n "${count}" ]; then
printf "%s%05d" "-" "${count}"
fi
# Add -g and exactly 12 hex chars.
printf '%s%.12s' -g "$head"
fi
if ${no_dirty}; then
return
fi
# Check for uncommitted changes.
# This script must avoid any write attempt to the source tree, which
# might be read-only.
# You cannot use 'git describe --dirty' because it tries to create
# .git/index.lock .
# First, with git-status, but --no-optional-locks is only supported in
# git >= 2.14, so fall back to git-diff-index if it fails. Note that
# git-diff-index does not refresh the index, so it may give misleading
# results.
# See git-update-index(1), git-diff-index(1), and git-status(1).
if {
git --no-optional-locks status -uno --porcelain 2>/dev/null ||
git diff-index --name-only HEAD
} | read dummy; then
printf '%s' -dirty
fi
}
collect_files()
{
local file res=
for file; do
case "$file" in
*\~*)
continue
;;
esac
if test -e "$file"; then
res="$res$(cat "$file")"
fi
done
echo "$res"
}
if [ -z "${KERNELVERSION}" ]; then
echo "KERNELVERSION is not set" >&2
exit 1
fi
# localversion* files in the build and source directory
file_localversion="$(collect_files localversion*)"
if test ! "$srctree" -ef .; then
file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
fi
if ${no_local}; then
echo "${KERNELVERSION}$(scm_version --no-dirty)"
exit 0
fi
if ! test -e include/config/auto.conf; then
echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
exit 1
fi
# version string from CONFIG_LOCALVERSION
config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
# scm version string if not at the kernel version tag or at the file_localversion
if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
# full scm version string
scm_version="$(scm_version)"
elif [ "${LOCALVERSION+set}" != "set" ]; then
# If the variable LOCALVERSION is not set, append a plus
# sign if the repository is not in a clean annotated or
# signed tagged state (as git describe only looks at signed
# or annotated tags - git tag -a/-s).
#
# If the variable LOCALVERSION is set (including being set
# to an empty string), we don't want to append a plus sign.
scm_version="$(scm_version --short)"
fi
echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}"
|
