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