build-aux/get-version

   1 #!/bin/sh
   2 #
   3 # get-version
   4 #
   5 # Copyright © 2009, 2013-2015, 2018, 2020 Guillem Jover <guillem@debian.org>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19 #
  20
  21 error()
  22 {
  23   echo "get-version: error: $*" 1>&2
  24   exit 1
  25 }
  26
  27 if [ -f .dist-version ]; then
  28   # Get the version from the file distributed in the tarball.
  29   version=$(cat .dist-version)
  30 elif [ -d .git ] || [ -f .git ]; then
  31   if ! command -v git >/dev/null; then
  32     error "cannot get project version, git checkout but git program not found"
  33   fi
  34
  35   # Get the version from the git repository. Since tags cannot contain colons
  36   # or tildes, we use percent and underscore instead. Reverse that switch here.
  37   version=$(git describe --abbrev=4 HEAD 2>/dev/null | tr %_ :~)
  38
  39   # Check if we are on a dirty checkout.
  40   git update-index --refresh -q >/dev/null
  41   dirty=$(git diff-index --name-only HEAD 2>/dev/null)
  42   if [ -n "$dirty" ]; then
  43     version="$version-dirty"
  44   fi
  45 else
  46   error "cannot get project version, not a git checkout nor a distribution tarball."
  47 fi
  48
  49 # Use printf to avoid the trailing new line that m4_esyscmd would not handle.
  50 printf "%s" "$version"