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