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TOMOYO Linux Cross Reference
Linux/scripts/setlocalversion

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  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 
 13 usage() {
 14         echo "Usage: $0 [--no-local] [srctree]" >&2
 15         exit 1
 16 }
 17 
 18 no_local=false
 19 if test "$1" = "--no-local"; then
 20         no_local=true
 21         shift
 22 fi
 23 
 24 srctree=.
 25 if test $# -gt 0; then
 26         srctree=$1
 27         shift
 28 fi
 29 if test $# -gt 0 -o ! -d "$srctree"; then
 30         usage
 31 fi
 32 
 33 scm_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 ${no_dirty}; then
109                 return
110         fi
111 
112         # Check for uncommitted changes.
113         # This script must avoid any write attempt to the source tree, which
114         # might be read-only.
115         # You cannot use 'git describe --dirty' because it tries to create
116         # .git/index.lock .
117         # First, with git-status, but --no-optional-locks is only supported in
118         # git >= 2.14, so fall back to git-diff-index if it fails. Note that
119         # git-diff-index does not refresh the index, so it may give misleading
120         # results.
121         # See git-update-index(1), git-diff-index(1), and git-status(1).
122         if {
123                 git --no-optional-locks status -uno --porcelain 2>/dev/null ||
124                 git diff-index --name-only HEAD
125         } | read dummy; then
126                 printf '%s' -dirty
127         fi
128 }
129 
130 collect_files()
131 {
132         local file res=
133 
134         for file; do
135                 case "$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 "$res"
145 }
146 
147 if [ -z "${KERNELVERSION}" ]; then
148         echo "KERNELVERSION is not set" >&2
149         exit 1
150 fi
151 
152 # localversion* files in the build and source directory
153 file_localversion="$(collect_files localversion*)"
154 if test ! "$srctree" -ef .; then
155         file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
156 fi
157 
158 if ${no_local}; then
159         echo "${KERNELVERSION}$(scm_version --no-dirty)"
160         exit 0
161 fi
162 
163 if ! test -e include/config/auto.conf; then
164         echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
165         exit 1
166 fi
167 
168 # version string from CONFIG_LOCALVERSION
169 config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
170 
171 # scm version string if not at the kernel version tag or at the file_localversion
172 if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
173         # full scm version string
174         scm_version="$(scm_version)"
175 elif [ "${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="$(scm_version --short)"
184 fi
185 
186 echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}"

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