scripts/setlocalversion

   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
  13 usage() {
  14         echo "Usage: $0 [--save-scmversion] [srctree]" >&2
  15         exit 1
  16 }
  17
  18 scm_only=false
  19 srctree=.
  20 if test "$1" = "--save-scmversion"; then
  21         scm_only=true
  22         shift
  23 fi
  24 if test $# -gt 0; then
  25         srctree=$1
  26         shift
  27 fi
  28 if test $# -gt 0 -o ! -d "$srctree"; then
  29         usage
  30 fi
  31
  32 scm_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 $head | cut -c1-12)"
  68                 fi
  69
  70                 # Check for uncommitted changes.
  71                 # This script must avoid any write attempt to the source tree,
  72                 # which might be read-only.
  73                 # You cannot use 'git describe --dirty' because it tries to
  74                 # create .git/index.lock .
  75                 # First, with git-status, but --no-optional-locks is only
  76                 # supported in git >= 2.14, so fall back to git-diff-index if
  77                 # it fails. Note that git-diff-index does not refresh the
  78                 # index, so it may give misleading results. See
  79                 # git-update-index(1), git-diff-index(1), and git-status(1).
  80                 if {
  81                         git --no-optional-locks status -uno --porcelain 2>/dev/null ||
  82                         git diff-index --name-only HEAD
  83                 } | read dummy; then
  84                         printf '%s' -dirty
  85                 fi
  86         fi
  87 }
  88
  89 collect_files()
  90 {
  91         local file res=
  92
  93         for file; do
  94                 case "$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
 106 if $scm_only; then
 107         if test ! -e .scmversion; then
 108                 res=$(scm_version)
 109                 echo "$res" >.scmversion
 110         fi
 111         exit
 112 fi
 113
 114 if ! test -e include/config/auto.conf; then
 115         echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
 116         exit 1
 117 fi
 118
 119 # localversion* files in the build and source directory
 120 res="$(collect_files localversion*)"
 121 if test ! "$srctree" -ef .; then
 122         res="$res$(collect_files "$srctree"/localversion*)"
 123 fi
 124
 125 # CONFIG_LOCALVERSION and LOCALVERSION (if set)
 126 config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
 127 res="${res}${config_localversion}${LOCALVERSION}"
 128
 129 # scm version string if not at a tagged commit
 130 if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
 131         # full scm version string
 132         res="$res$(scm_version)"
 133 elif [ "${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${scm:++}"
 143 fi
 144
 145 echo "$res"