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 33scm_version() 34{ 35 local short=false 36 local no_dirty=false 37 local tag 38 39 while [ $# -gt 0 ]; 40 do 41 case "$1" in 42 --short) 43 short=true;; 44 --no-dirty) 45 no_dirty=true;; 46 esac 47 shift 48 done 49 50 cd "$srctree" 51 52 if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then 53 return 54 fi 55 56 if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then 57 return 58 fi 59 60 # mainline kernel: 6.2.0-rc5 -> v6.2-rc5 61 # stable kernel: 6.1.7 -> v6.1.7 62 version_tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/') 63 64 # If a localversion* file exists, and the corresponding 65 # annotated tag exists and is an ancestor of HEAD, use 66 # it. This is the case in linux-next. 67 tag=${file_localversion#-} 68 desc= 69 if [ -n "${tag}" ]; then 70 desc=$(git describe --match=$tag 2>/dev/null) 71 fi 72 73 # Otherwise, if a localversion* file exists, and the tag 74 # obtained by appending it to the tag derived from 75 # KERNELVERSION exists and is an ancestor of HEAD, use 76 # it. This is e.g. the case in linux-rt. 77 if [ -z "${desc}" ] && [ -n "${file_localversion}" ]; then 78 tag="${version_tag}${file_localversion}" 79 desc=$(git describe --match=$tag 2>/dev/null) 80 fi 81 82 # Otherwise, default to the annotated tag derived from KERNELVERSION. 83 if [ -z "${desc}" ]; then 84 tag="${version_tag}" 85 desc=$(git describe --match=$tag 2>/dev/null) 86 fi 87 88 # If we are at the tagged commit, we ignore it because the version is 89 # well-defined. 90 if [ "${tag}" != "${desc}" ]; then 91 92 # If only the short version is requested, don't bother 93 # running further git commands 94 if $short; then 95 echo "+" 96 return 97 fi 98 # If we are past the tagged commit, we pretty print it. 99 # (like 6.1.0-14595-g292a089d78d3) 100 if [ -n "${desc}" ]; then 101 echo "${desc}" | awk -F- '{printf("-%05d", $(NF-1))}' 102 fi 103 104 # Add -g and exactly 12 hex chars. 105 printf '%s%s' -g "$(echo $head | cut -c1-12)" 106 fi 107 108 if ${no_dirty}; then 109 return 110 fi 111 112 # Check for uncommitted changes. 113 # This script must avoid any write attempt to the source tree, which 114 # might be read-only. 115 # You cannot use 'git describe --dirty' because it tries to create 116 # .git/index.lock . 117 # First, with git-status, but --no-optional-locks is only supported in 118 # git >= 2.14, so fall back to git-diff-index if it fails. Note that 119 # git-diff-index does not refresh the index, so it may give misleading 120 # results. 121 # See git-update-index(1), git-diff-index(1), and git-status(1). 122 if { 123 git --no-optional-locks status -uno --porcelain 2>/dev/null || 124 git diff-index --name-only HEAD 125 } | read dummy; then 126 printf '%s' -dirty 127 fi 128} 129 130collect_files() 131{ 132 local file res= 133 134 for file; do 135 case "$file" in 136 *\~*) 137 continue 138 ;; 139 esac 140 if test -e "$file"; then 141 res="$res$(cat "$file")" 142 fi 143 done 144 echo "$res" 145} 146 147if [ -z "${KERNELVERSION}" ]; then 148 echo "KERNELVERSION is not set" >&2 149 exit 1 150fi 151 152# localversion* files in the build and source directory 153file_localversion="$(collect_files localversion*)" 154if test ! "$srctree" -ef .; then 155 file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)" 156fi 157 158if ${no_local}; then 159 echo "${KERNELVERSION}$(scm_version --no-dirty)" 160 exit 0 161fi 162 163if ! test -e include/config/auto.conf; then 164 echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 165 exit 1 166fi 167 168# version string from CONFIG_LOCALVERSION 169config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) 170 171# scm version string if not at the kernel version tag or at the file_localversion 172if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then 173 # full scm version string 174 scm_version="$(scm_version)" 175elif [ "${LOCALVERSION+set}" != "set" ]; then 176 # If the variable LOCALVERSION is not set, append a plus 177 # sign if the repository is not in a clean annotated or 178 # signed tagged state (as git describe only looks at signed 179 # or annotated tags - git tag -a/-s). 180 # 181 # If the variable LOCALVERSION is set (including being set 182 # to an empty string), we don't want to append a plus sign. 183 scm_version="$(scm_version --short)" 184fi 185 186echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}" 187