#!/bin/sh

#

# get-version

#

# Copyright © 2009 Guillem Jover <guillem@hadrons.org>

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

# 1. Redistributions of source code must retain the above copyright

#    notice, this list of conditions and the following disclaimer.

# 2. Redistributions in binary form must reproduce the above copyright

#    notice, this list of conditions and the following disclaimer in the

#    documentation and/or other materials provided with the distribution.

# 3. The name of the author may not be used to endorse or promote products

#    derived from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,

# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL

# THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

if [ -f .dist-version ]; then

  # Get the version from the file distributed in the tarball.

  version=$(cat .dist-version)

elif [ -e .git ]; then

  # Ger the version from the git repository.

  version=$(git describe --tags --always --match [0-9]* 2> /dev/null)

  # Check if we are on a dirty checkout.

  git update-index --refresh -q >/dev/null

  dirty=$(git diff-index --name-only --ignore-submodules=untracked HEAD 2>/dev/null)

  if [ -n "$dirty" ]; then

    version="$version-dirty"

  fi

else

  version=$(date +%F)

fi

# Use printf to avoid the trailing new line that m4_esyscmd would not handle.

printf "$version"