#! /bin/sh
#
#   Do a cvs diff from the current directory and put the file names
#   in suitable format for use in a ChangeLog.
#
#   TODO:  No outstanding isses.
#
#  $Id$
#

mklog_()
{
  cat >XXX
  if test `cat XXX | wc -l` -ne 0 ; then
    (cat XXX | cut -d':' -f2 | \
    sed -e '$!s/$/,/' -e '$s/$/:/' ; \
    test $? -ne 0 || echo "$*" )| \
    xargs -s80 | sed -e '1s/^/	\* /' -e '2,$s/^/	/' 
  fi
  rm -f XXX
}

progname=${0##*/}
usage()
{
  echo "$progname [-ln] [-u user] [-U user_information] [-m message] [-M msgfile]"
  exit 1
}

print_name="no"
user=$LOGNAME
cvs_local_arg=""
basedir=.
while getopts d:lnM:m:p:c:u:U: OPT
do
  case "$OPT" in 
    d) basedir=$OPTARG ;;
    l) cvs_local_arg="-l" ;;
    n) print_name="yes" ;;
    p) prnum=$OPTARG ;;
    c) coverity_num=$OPTARG ;;
    m) message=$OPTARG ;; 
    M) message=`cat $OPTARG` ;; 
    u) user=$OPTARG ; print_name="yes" ;;
    U) user_name=$OPTARG ; print_name="yes" ;;
    *) usage ;;
  esac
done

let $((shiftcount = $OPTIND - 1))
shift #shiftcount

args=$*

cvsarg="${cvs_local_arg} ${basedir}"

if [ -d .svn ] ; then
  CVS=svn
elif [ -d CVS ] ; then
  cmd=cvs
  # done parsing arguments, now work 
  if [ "X${CVSROOT}" = "X" ] ; then
    CVS=${cmd}
  else
    CVS="${cmd} -d ${CVSROOT}"
  fi
else
  echo "This does not look like a CVS or SVN checkout."
  exit 1
fi

CVS="${CVS}"

if [ ! -r ChangeLog ] ; then
  ( echo "There is no ChangeLog in this directory." ;
    echo "Where are you putting the entry?" )>/dev/stderr
  exit 1
fi

files_modded=`${CVS} diff ${cvsarg} 2>&1 | grep ^Index | wc -l`
files_added=`${CVS} diff ${cvsarg} 2>&1 | grep "is a new entry, no " | wc -l`
files_deleted=`${CVS} diff ${cvsarg} 2>&1 | grep " was removed, no " | wc -l`
files_changed=`expr ${files_modded} + ${files_added} + ${files_deleted}`
if test ${files_changed} -eq 0 ; then
  exit 0
fi

if test ${print_name} = "yes" ; then
  if test "X${user_name}" = "X" ; then
    if test "X${user}" = "X" ; then
      echo "User not specified (LOGNAME not set or no -u option)"
      usage
    fi

    user_name=`grep ^${user} /etc/passwd | cut -d':' -f5 | cut -d',' -f1`
    if test "X${user_name}" = "X" ; then
      echo "User information not set"
      usage
    fi
  fi

  date=`date +%Y-%m-%d`
  echo "${date}	${user_name}"
  echo
fi

if test "X${prnum}" != "X" ; then
  echo "	PR ${prnum}"
fi
if test "X${coverity_num}" != "X" ; then
  echo "	Coverity Id ${coverity_num}"
fi

# Generate list of modified files
${CVS} diff ${cvsarg} 2>/dev/null | grep ^Index | mklog_ ${message}

# Generate list of deleted files
test ${files_added} -gt 1 && plural=s
${CVS} diff ${cvsarg} 2>&1 | grep "is a new entry, no comparison" | \
  sed -e 's/^.*: //' -e 's/ is a .*$//' | mklog_ "New file${plural}."

# Generate list of removed files
${CVS} diff ${cvsarg} 2>&1 | grep "was removed, no comparison" | \
  sed -e 's/^.*: //' -e 's/ was removed, no comparison.*$//' | \
  mklog_ Removed.
echo

rm -f XXX
exit 0