#!/bin/sh

# ctg_commit
#
# David Adams
# April 11, 2003
# Updated for ctest_gnu 20jan05
#
# Commits the code in the current directory and then tags using
# the content of VERSION. No action is taken if VERSION is not
# present.
#
# Argument is the message to log with the commit.
#

# Extract command line options.
HELP=
FORCE=
BRANCH=
COMMIT=true
TAG=true
while getopts hfb: OPT; do
  case $OPT in
  h) HELP=true;;
  f) FORCE=true;;
  b) BRANCH=$OPTARG;;
  *) exit 1;;
  esac
done
shift $(( OPTIND - 1 ))

# Display help if requested
if [ -n "$HELP" ]; then
  echo Usage: $0 [ -f ] '"log message"'
  echo "  -f forces commit even if version is not changed"
  echo "  -b brname tags changes on branch brname"
  echo "  (First create branch with \"cvs rtag -b brname my_module\")"
  exit 0
fi

# Fetch the log message.
if [ "$#" -eq 0 ]; then
  echo Log message must be provided
  exit 1
fi
MSG=$*

# Fetch the package name
REP=CVS/Repository
if [ ! -r $REP ]; then
  echo Unable to find $REP
  exit 2
fi
PKG=`cat $REP`
if [ $? != 0  -o  -z "$PKG" ]; then
  echo Unable to parse $REP
  exit 3
fi

# Check if there are any changes in the package.
if [ `cvs diff > /dev/null 2>&1; echo $?` = 0 ]; then
  echo "Package $PKG is unchanged: modify VERSION to force tag"
  exit 0
fi

# Fetch the version
if [ ! -r VERSION ]; then
  echo Unable to read VERSION
  exit 4
fi
## if version is unchanged...
if [ `cvs diff VERSION > /dev/null 2>&1; echo $?` = 0 ]; then
  if [ -n "$FORCE" ]; then
    echo WARNING: Continuuing with VERSION unchanged
  else
    echo Modify VERSION before commiting changes
    exit 5
  fi
  VERSIONCHANGE=
else
  VERSIONCHANGE=true
fi
VERSION=`cat VERSION`
if [ $? != 0  -o  "$VERSION" = "" ]; then
  echo Unable to parse VERSION
  exit 6
fi

# Record the new version.
CHFILE=doc/changes.txt
if [ -r $CHFILE ]; then
  mv $CHFILE $CHFILE.tmp
  if [ -n "$VERSIONCHANGE" ]; then
    echo "$VERSION "`date +"%d%b%y %H%M"`" - $MSG" > $CHFILE.ver
  else
    echo "          "`date +"%d%b%y %H%M"`" - $MSG" > $CHFILE.ver
  fi
  cat $CHFILE.ver $CHFILE.tmp > $CHFILE
  rm $CHFILE.ver $CHFILE.tmp
else
  echo $CHFILE not found -- change not recorded
  exit 7
fi

# Commit changes.
COMMITDONE=
if [ -n "$COMMIT" ]; then
  echo
  echo Committing...
  cvs commit -m "$MSG"
  STAT=$?
  if [ $STAT != 0 ]; then
    echo Commit failed with error $STAT
    exit 8
  fi
  COMMITDONE=true
fi

# Tag.
TAGDONE=
TVERSION=v`echo $VERSION | sed 's/\./-/g'`
if [ -n "$TAG" ]; then
  echo
  if [ -n "$VERSIONCHANGE" ]; then
    echo Tagging...
    if [ -n "$BRANCH" ]; then
      cvs rtag -r $BRANCH $TVERSION $PKG
    else
      cvs rtag $TVERSION $PKG
    fi
    STAT=$?
    if [ $STAT != 0 ]; then
      echo Tag failed with error $STAT
      exit 8
    fi
    TAGDONE=true
  else
    echo Version unchanged -- tag not applied
  fi
fi

echo

# Display commit and tag status
echo -n Changes to package $PKG
if [ -z "$COMMITDONE" ]; then
  echo -n " not"
fi
echo -n " committed and"
if [ -z "$TAGDONE" ]; then
  echo " not tagged"
else
  echo " tagged $TVERSION"
  if [ -n "$BRANCH" ]; then
    echo "  Tag applied to branch $BRANCH"
  fi
fi