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