1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# This scripts adds local version information from the version 5# control systems git, mercurial (hg) and subversion (svn). 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 # If a localversion*' file and the corresponding annotated tag exist, 61 # use it. This is the case in linux-next. 62 tag=${file_localversion#-} 63 tag=$(git describe --exact-match --match=$tag $tag 2>/dev/null) 64 65 # Otherwise, default to the annotated tag derived from KERNELVERSION. 66 # mainline kernel: 6.2.0-rc5 -> v6.2-rc5 67 # stable kernel: 6.1.7 -> v6.1.7 68 if [ -z "${tag}" ]; then 69 tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/') 70 fi 71 72 # If we are at the tagged commit, we ignore it because the version is 73 # well-defined. 74 if [ -z "$(git describe --exact-match --match=$tag 2>/dev/null)" ]; then 75 76 # If only the short version is requested, don't bother 77 # running further git commands 78 if $short; then 79 echo "+" 80 return 81 fi 82 # If we are past the tagged commit, we pretty print it. 83 # (like 6.1.0-14595-g292a089d78d3) 84 if atag="$(git describe --match=$tag 2>/dev/null)"; then 85 echo "$atag" | awk -F- '{printf("-%05d", $(NF-1))}' 86 fi 87 88 # Add -g and exactly 12 hex chars. 89 printf '%s%s' -g "$(echo $head | cut -c1-12)" 90 fi 91 92 if ${no_dirty}; then 93 return 94 fi 95 96 # Check for uncommitted changes. 97 # This script must avoid any write attempt to the source tree, which 98 # might be read-only. 99 # You cannot use 'git describe --dirty' because it tries to create 100 # .git/index.lock . 101 # First, with git-status, but --no-optional-locks is only supported in 102 # git >= 2.14, so fall back to git-diff-index if it fails. Note that 103 # git-diff-index does not refresh the index, so it may give misleading 104 # results. 105 # See git-update-index(1), git-diff-index(1), and git-status(1). 106 if { 107 git --no-optional-locks status -uno --porcelain 2>/dev/null || 108 git diff-index --name-only HEAD 109 } | read dummy; then 110 printf '%s' -dirty 111 fi 112} 113 114collect_files() 115{ 116 local file res= 117 118 for file; do 119 case "$file" in 120 *\~*) 121 continue 122 ;; 123 esac 124 if test -e "$file"; then 125 res="$res$(cat "$file")" 126 fi 127 done 128 echo "$res" 129} 130 131if [ -z "${KERNELVERSION}" ]; then 132 echo "KERNELVERSION is not set" >&2 133 exit 1 134fi 135 136# localversion* files in the build and source directory 137file_localversion="$(collect_files localversion*)" 138if test ! "$srctree" -ef .; then 139 file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)" 140fi 141 142if ${no_local}; then 143 echo "${KERNELVERSION}$(scm_version --no-dirty)" 144 exit 0 145fi 146 147if ! test -e include/config/auto.conf; then 148 echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 149 exit 1 150fi 151 152# version string from CONFIG_LOCALVERSION 153config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) 154 155# scm version string if not at the kernel version tag or at the file_localversion 156if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then 157 # full scm version string 158 scm_version="$(scm_version)" 159elif [ "${LOCALVERSION+set}" != "set" ]; then 160 # If the variable LOCALVERSION is not set, append a plus 161 # sign if the repository is not in a clean annotated or 162 # signed tagged state (as git describe only looks at signed 163 # or annotated tags - git tag -a/-s). 164 # 165 # If the variable LOCALVERSION is set (including being set 166 # to an empty string), we don't want to append a plus sign. 167 scm_version="$(scm_version --short)" 168fi 169 170echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}" 171