1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# This scripts adds local version information from the version 5# control system git. 6# 7# If something goes wrong, send a mail the kernel build mailinglist 8# (see MAINTAINERS) and CC Nico Schottelius 9# <nico-linuxsetlocalversion -at- schottelius.org>. 10# 11# 12 13set -e 14 15usage() { 16 echo "Usage: $0 [--no-local] [srctree]" >&2 17 exit 1 18} 19 20no_local=false 21if test "$1" = "--no-local"; then 22 no_local=true 23 shift 24fi 25 26srctree=. 27if test $# -gt 0; then 28 srctree=$1 29 shift 30fi 31if test $# -gt 0 -o ! -d "$srctree"; then 32 usage 33fi 34 35try_tag() { 36 tag="$1" 37 38 # Is $tag an annotated tag? 39 if [ "$(git cat-file -t "$tag" 2> /dev/null)" != tag ]; then 40 return 41 fi 42 43 # Is it an ancestor of HEAD, and if so, how many commits are in $tag..HEAD? 44 # shellcheck disable=SC2046 # word splitting is the point here 45 set -- $(git rev-list --count --left-right "$tag"...HEAD 2> /dev/null) 46 47 # $1 is 0 if and only if $tag is an ancestor of HEAD. Use 48 # string comparison, because $1 is empty if the 'git rev-list' 49 # command somehow failed. 50 if [ "$1" != 0 ]; then 51 return 52 fi 53 54 # $2 is the number of commits in the range $tag..HEAD, possibly 0. 55 count="$2" 56} 57 58scm_version() 59{ 60 local short=false 61 local no_dirty=false 62 local tag 63 64 while [ $# -gt 0 ]; 65 do 66 case "$1" in 67 --short) 68 short=true;; 69 --no-dirty) 70 no_dirty=true;; 71 esac 72 shift 73 done 74 75 cd "$srctree" 76 77 if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then 78 return 79 fi 80 81 if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then 82 return 83 fi 84 85 # mainline kernel: 6.2.0-rc5 -> v6.2-rc5 86 # stable kernel: 6.1.7 -> v6.1.7 87 version_tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/') 88 89 # try_tag initializes count if the tag is usable. 90 count= 91 92 # If a localversion* file exists, and the corresponding 93 # annotated tag exists and is an ancestor of HEAD, use 94 # it. This is the case in linux-next. 95 if [ -n "${file_localversion#-}" ] ; then 96 try_tag "${file_localversion#-}" 97 fi 98 99 # Otherwise, if a localversion* file exists, and the tag 100 # obtained by appending it to the tag derived from 101 # KERNELVERSION exists and is an ancestor of HEAD, use 102 # it. This is e.g. the case in linux-rt. 103 if [ -z "${count}" ] && [ -n "${file_localversion}" ]; then 104 try_tag "${version_tag}${file_localversion}" 105 fi 106 107 # Otherwise, default to the annotated tag derived from KERNELVERSION. 108 if [ -z "${count}" ]; then 109 try_tag "${version_tag}" 110 fi 111 112 # If we are at the tagged commit, we ignore it because the 113 # version is well-defined. If none of the attempted tags exist 114 # or were usable, $count is still empty. 115 if [ -z "${count}" ] || [ "${count}" -gt 0 ]; then 116 117 # If only the short version is requested, don't bother 118 # running further git commands 119 if $short; then 120 echo "+" 121 return 122 fi 123 124 # If we are past the tagged commit, we pretty print it. 125 # (like 6.1.0-14595-g292a089d78d3) 126 if [ -n "${count}" ]; then 127 printf "%s%05d" "-" "${count}" 128 fi 129 130 # Add -g and exactly 12 hex chars. 131 printf '%s%.12s' -g "$head" 132 fi 133 134 if ${no_dirty}; then 135 return 136 fi 137 138 # Check for uncommitted changes. 139 # This script must avoid any write attempt to the source tree, which 140 # might be read-only. 141 # You cannot use 'git describe --dirty' because it tries to create 142 # .git/index.lock . 143 # First, with git-status, but --no-optional-locks is only supported in 144 # git >= 2.14, so fall back to git-diff-index if it fails. Note that 145 # git-diff-index does not refresh the index, so it may give misleading 146 # results. 147 # See git-update-index(1), git-diff-index(1), and git-status(1). 148 if { 149 git --no-optional-locks status -uno --porcelain 2>/dev/null || 150 git diff-index --name-only HEAD 151 } | read dummy; then 152 printf '%s' -dirty 153 fi 154} 155 156collect_files() 157{ 158 local file res= 159 160 for file; do 161 case "$file" in 162 *\~*) 163 continue 164 ;; 165 esac 166 if test -e "$file"; then 167 res="$res$(cat "$file")" 168 fi 169 done 170 echo "$res" 171} 172 173if [ -z "${KERNELVERSION}" ]; then 174 echo "KERNELVERSION is not set" >&2 175 exit 1 176fi 177 178# localversion* files in the build and source directory 179file_localversion="$(collect_files localversion*)" 180if test ! "$srctree" -ef .; then 181 file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)" 182fi 183 184if ${no_local}; then 185 echo "${KERNELVERSION}$(scm_version --no-dirty)" 186 exit 0 187fi 188 189if ! test -e include/config/auto.conf; then 190 echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 191 exit 1 192fi 193 194# version string from CONFIG_LOCALVERSION 195config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) 196 197# scm version string if not at the kernel version tag or at the file_localversion 198if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then 199 # full scm version string 200 scm_version="$(scm_version)" 201elif [ "${LOCALVERSION+set}" != "set" ]; then 202 # If the variable LOCALVERSION is not set, append a plus 203 # sign if the repository is not in a clean annotated or 204 # signed tagged state (as git describe only looks at signed 205 # or annotated tags - git tag -a/-s). 206 # 207 # If the variable LOCALVERSION is set (including being set 208 # to an empty string), we don't want to append a plus sign. 209 scm_version="$(scm_version --short)" 210fi 211 212echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}" 213