#!/bin/sh

# hg2cl.sh - front end shell script for svn2cl.xsl, calls xsltproc
#             with the correct parameters
# 
# Copyright (C) 2005 Arthur de Jong.
# Copyright (C) 2008 Matti Hamalainen
# 
# 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 BY THE AUTHOR ``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.

# exit on any failures
set -e

# svn2cl version
VERSION="0.2"

# set default parameters
STRIPPREFIX=`basename $(pwd)`
LINELEN=75
GROUPBYDAY="yes"
INCLUDEREV="no"
CHANGELOG="ChangeLog"

# do command line checking
prog=`basename $0`
while [ -n "$1" ]
do
  case "$1" in
    --strip-prefix)
      STRIPPREFIX="$2"
      shift 2
      ;;
    --linelen)
      LINELEN="$2";
      shift 2
      ;;
    --separate)
      GROUPBYDAY="no";
      shift
      ;;
    -r|--include-rev)
      INCLUDEREV="yes";
      shift
      ;;
    -O|--hg-options)
      EXTRAOPTS="$2"
      shift 2
      ;;
    -o|--output)
      CHANGELOG="$2"
      shift 2
      ;;
    --stdout)
      CHANGELOG="-"
      shift
      ;;
    -V|--version)
      echo "$prog $VERSION";
      echo "Written by Arthur de Jong."
      echo "Modified for Mercurial by Matti Hamalainen."
      echo "Copyright (C) 2005 Arthur de Jong."
      echo "Copyright (C) 2008 Matti Hamalainen."
      echo ""
      echo "This is free software; see the source for copying conditions.  There is NO"
      echo "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
      exit 0
      ;;
    -h|--help)
      echo "Usage: $prog [OPTION]..."
      echo "Generate a ChangeLog from a checked out subversion repository."
      echo ""
      echo "  --strip-prefix NAME    prefix to strip from all entries, defaults"
      echo "                         to the name of the current directory"
      echo "  --linelen NUM          maximum length of an output line"
      echo "  --separate             don't group changelog entries by day"
      echo "  -r, --include-rev      include revision numbers"
      echo "  -o, --output FILE      output to FILE instead of ChangeLog"
      echo "  --stdout               output to stdout instead of ChangeLog"
      echo "  -O, --hg-options OPTS  options passed to Mercurial"
      echo "  -h, --help             display this help and exit"
      echo "  -V, --version          output version information and exit"
      exit 0
      ;;
    *)
      echo "$prog: invalid option -- $1"
      echo "Try \`$prog --help' for more information."
      exit 1
      ;;
  esac
done

# find the directory that this script resides in
prog="$0"
while test -h "$prog"; do
  prog=`ls -ld "$prog" | sed "s/^.*-> \(.*\)/\1/;/^[^/]/s,^,$(dirname "$prog")/,"`
done
dir=`dirname $prog`
dir=`cd $dir && pwd`
XSL="$dir/svn2cl.xsl"

# redirect stdout to the changelog file if needed
if test "x$CHANGELOG" != "x-"; then
  exec > "$CHANGELOG"
fi

# actually run the command we need
( echo '<?xml version="1.0"?>' &&
echo '<log>' && \
hg log $EXTRAOPTS -M -v -f --template \
'<logentry revision="#rev#"><author>#author|escape#</author><date>#date|isodate#</date><paths><path>#files#</path></paths><msg>#desc|escape#</msg></logentry>\n' && \
echo '</log>' ) | \
iconv -f "iso-8859-1" -t "utf-8" | \
xsltproc --stringparam strip-prefix "$STRIPPREFIX" \
         --stringparam linelen $LINELEN \
         --stringparam groupbyday $GROUPBYDAY \
         --stringparam include-rev $INCLUDEREV \
         "$XSL" -