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 [--save-scmversion] [srctree]" >&2 15 exit 1 16} 17 18scm_only=false 19srctree=. 20if test "$1" = "--save-scmversion"; then 21 scm_only=true 22 shift 23fi 24if test $# -gt 0; then 25 srctree=$1 26 shift 27fi 28if test $# -gt 0 -o ! -d "$srctree"; then 29 usage 30fi 31 32scm_version() 33{ 34 local short 35 short=false 36 37 cd "$srctree" 38 if test -e .scmversion; then 39 cat .scmversion 40 return 41 fi 42 if test "$1" = "--short"; then 43 short=true 44 fi 45 46 # Check for git and a git repo. 47 if test -z "$(git rev-parse --show-cdup 2>/dev/null)" && 48 head=$(git rev-parse --verify HEAD 2>/dev/null); then 49 50 # If we are at a tagged commit (like "v2.6.30-rc6"), we ignore 51 # it, because this version is defined in the top level Makefile. 52 if [ -z "$(git describe --exact-match 2>/dev/null)" ]; then 53 54 # If only the short version is requested, don't bother 55 # running further git commands 56 if $short; then 57 echo "+" 58 return 59 fi 60 # If we are past a tagged commit (like 61 # "v2.6.30-rc5-302-g72357d5"), we pretty print it. 62 if atag="$(git describe 2>/dev/null)"; then 63 echo "$atag" | awk -F- '{printf("-%05d", $(NF-1))}' 64 fi 65 66 # Add -g and exactly 12 hex chars. 67 printf '%s%s' -g "$(echo $head | cut -c1-12)" 68 fi 69 70 # Check for uncommitted changes. 71 # This script must avoid any write attempt to the source tree, 72 # which might be read-only. 73 # You cannot use 'git describe --dirty' because it tries to 74 # create .git/index.lock . 75 # First, with git-status, but --no-optional-locks is only 76 # supported in git >= 2.14, so fall back to git-diff-index if 77 # it fails. Note that git-diff-index does not refresh the 78 # index, so it may give misleading results. See 79 # git-update-index(1), git-diff-index(1), and git-status(1). 80 if { 81 git --no-optional-locks status -uno --porcelain 2>/dev/null || 82 git diff-index --name-only HEAD 83 } | read dummy; then 84 printf '%s' -dirty 85 fi 86 fi 87} 88 89collect_files() 90{ 91 local file res= 92 93 for file; do 94 case "$file" in 95 *\~*) 96 continue 97 ;; 98 esac 99 if test -e "$file"; then 100 res="$res$(cat "$file")" 101 fi 102 done 103 echo "$res" 104} 105 106if $scm_only; then 107 if test ! -e .scmversion; then 108 res=$(scm_version) 109 echo "$res" >.scmversion 110 fi 111 exit 112fi 113 114if ! test -e include/config/auto.conf; then 115 echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 116 exit 1 117fi 118 119# localversion* files in the build and source directory 120res="$(collect_files localversion*)" 121if test ! "$srctree" -ef .; then 122 res="$res$(collect_files "$srctree"/localversion*)" 123fi 124 125# CONFIG_LOCALVERSION and LOCALVERSION (if set) 126config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) 127res="${res}${config_localversion}${LOCALVERSION}" 128 129# scm version string if not at a tagged commit 130if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then 131 # full scm version string 132 res="$res$(scm_version)" 133elif [ "${LOCALVERSION+set}" != "set" ]; then 134 # If the variable LOCALVERSION is not set, append a plus 135 # sign if the repository is not in a clean annotated or 136 # signed tagged state (as git describe only looks at signed 137 # or annotated tags - git tag -a/-s). 138 # 139 # If the variable LOCALVERSION is set (including being set 140 # to an empty string), we don't want to append a plus sign. 141 scm=$(scm_version --short) 142 res="$res${scm:++}" 143fi 144 145echo "$res" 146