#!/bin/sh
#
# Usage:
#   gnc-svnversion <srcdir>
#
# Prints the revision number to stdout and exits 0 on success
# exits with errorcode 1 if we're not in an svn, svk or git checkout
#
# Written By:  Derek Atkins <derek@ihtfp.com>
#
# $Id$

# Print an error message and then exit
my_die()
{
  echo "$1"
  exit 1
}

# Make sure we have a srcdir
[ -n "$1" ] || my_die "Usage: $0 <srcdir>"
[ -d "$1" ] || my_die "$0: $1: not a directory"

# Find the real srcdir.
# This handles the case of a symlink (lndir) tree
# $real_srcdir will hold the actual source dir
if test -h "$1"/Makefile.am
then 
  tmp_srcdir=`readlink "$1"/Makefile.am`
  real_srcdir="$1/`dirname ${tmp_srcdir}`"
else
  real_srcdir="$1"
fi

# Test if this code is an SVN Checkout
#   If this is an svn checkout we assume you have svnversion!
if test -d "${real_srcdir}"/.svn
then
  svnversion "$real_srcdir"
  exit $?
fi

# If we get here then this is NOT an svn checkout.

# Maybe it's git?
if test -d "${real_srcdir}"/.git
then
  githead=`git --git-dir "${real_srcdir}"/.git rev-parse HEAD 2>/dev/null`
  if test $? = 0 ; then
    echo $githead
    exit 0
  else
    exit 1
  fi
fi

if test $OSTYPE == "msys"
then
  svk_name="svk.bat"
  svk_cmd="cmd \/c svk"
else
  svk_name="svk"
  svk_cmd="svk"
fi

# Maybe it's SVK?  First, check if we've got 'svk' in the path.  If not,
# then exit with an error code of 1..
which $svk_name >/dev/null 2>&1
if test $? != 0 ; then exit 1 ; fi

# Okay, we have 'svk'.  Now see if $real_srcdir is an svk checkout
# Note that the 'echo n' is to protect against having svk installed
# without having configured the depotmap.
svkinfo=`echo n | $svk_cmd info "$real_srcdir" 2>&1`
if test $? != 0 ; then exit 1 ; fi

# If we got here, then $real_srcdir is an svk checkout.  Parse out
# the revision info, print it out, and then output 0.  Just combine
# all the revision numbers into a single string by combining them
# with periods.
svkinfo=`$svk_cmd info "$real_srcdir" | grep Rev | head -5 | sed -e 's/^.* \([0-9:]*\)$/\1/'`
echo $svkinfo | sed -e 's/ /./g'

exit 0