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 $short; then 57 echo "+" 58 return 59 fi 60 # If we are past a tagged commit (like 61 # "v2.6.30-rc5-302-g72357d5"), we pretty print it. 62 # 63 # Ensure the abbreviated sha1 has exactly 12 64 # hex characters, to make the output 65 # independent of git version, local 66 # core.abbrev settings and/or total number of 67 # objects in the current repository - passing 68 # --abbrev=12 ensures a minimum of 12, and the 69 # awk substr() then picks the 'g' and first 12 70 # hex chars. 71 if atag="$(git describe --abbrev=12 2>/dev/null)"; then 72 echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),substr($(NF),0,13))}' 73 74 # If we don't have a tag at all we print -g{commitish}, 75 # again using exactly 12 hex chars. 76 else 77 head="$(echo $head | cut -c1-12)" 78 printf '%s%s' -g $head 79 fi 80 fi 81 82 # Check for uncommitted changes. 83 # This script must avoid any write attempt to the source tree, 84 # which might be read-only. 85 # You cannot use 'git describe --dirty' because it tries to 86 # create .git/index.lock . 87 # First, with git-status, but --no-optional-locks is only 88 # supported in git >= 2.14, so fall back to git-diff-index if 89 # it fails. Note that git-diff-index does not refresh the 90 # index, so it may give misleading results. See 91 # git-update-index(1), git-diff-index(1), and git-status(1). 92 if { 93 git --no-optional-locks status -uno --porcelain 2>/dev/null || 94 git diff-index --name-only HEAD 95 } | read dummy; then 96 printf '%s' -dirty 97 fi 98 fi 99} 100 101collect_files() 102{ 103 local file res= 104 105 for file; do 106 case "$file" in 107 *\~*) 108 continue 109 ;; 110 esac 111 if test -e "$file"; then 112 res="$res$(cat "$file")" 113 fi 114 done 115 echo "$res" 116} 117 118if $scm_only; then 119 if test ! -e .scmversion; then 120 res=$(scm_version) 121 echo "$res" >.scmversion 122 fi 123 exit 124fi 125 126if test -e include/config/auto.conf; then 127 . include/config/auto.conf 128else 129 echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 130 exit 1 131fi 132 133# localversion* files in the build and source directory 134res="$(collect_files localversion*)" 135if test ! "$srctree" -ef .; then 136 res="$res$(collect_files "$srctree"/localversion*)" 137fi 138 139# CONFIG_LOCALVERSION and LOCALVERSION (if set) 140res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}" 141 142# scm version string if not at a tagged commit 143if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then 144 # full scm version string 145 res="$res$(scm_version)" 146else 147 # append a plus sign if the repository is not in a clean 148 # annotated or signed tagged state (as git describe only 149 # looks at signed or annotated tags - git tag -a/-s) and 150 # LOCALVERSION= is not specified 151 if test "${LOCALVERSION+set}" != "set"; then 152 scm=$(scm_version --short) 153 res="$res${scm:++}" 154 fi 155fi 156 157echo "$res" 158