#!/bin/bash -f

#

# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

# Script to update the Copyright YEAR range in Mercurial sources.

#  (Originally from xdono, Thanks!)

if [ "`uname -s`" = "SunOS" ] ; then

  awk=nawk

else

  awk=awk

fi

# Stop on any error

set -e

# Temp area

tmp=/tmp/`basename $0`.${USER}.$$

rm -f -r ${tmp}

mkdir -p ${tmp}

total=0

# This year or supplied year

if [ "$1" != "" ] ; then

  year="$1"

else

  year=`date +%Y`

fi

# Return true if it makes sense to edit this file

saneFileToCheck()

{

  if [ "$1" != "" -a -f $1 ] ; then

    isText=`file "$1" | egrep -i '(text|source)' | cat`

    hasCopyright=`grep 'Copyright' "$1" | cat`

    lastLineCount=`tail -1 "$1" | wc -l`

    if [ "${isText}" != ""  \

         -a "${hasCopyright}" != "" \

	 -a ${lastLineCount} -eq 1 ] ; then

      echo "true"

    else

      echo "false"

    fi

  else

    echo "false"

  fi

}

# Update the copyright year on a file

updateFile() # file

{

  changed="false"

  if [ `saneFileToCheck "$1"` = "true" ] ; then

    copyright="Copyright (c)"

    company="Oracle"

    rm -f $1.OLD

    mv $1 $1.OLD

    cat $1.OLD | \

      sed -e "s@\(${copyright} [12][0-9][0-9][0-9],\) [12][0-9][0-9][0-9], ${company}@\1 ${year}, ${company}@" | \

      sed -e "s@\(${copyright} [12][0-9][0-9][0-9],\) ${company}@\1 ${year}, ${company}@" | \

      sed -e "s@${copyright} ${year}, ${year}, ${company}@${copyright} ${year}, ${company}@"  \

      > $1

    if ! diff -b -w $1.OLD $1 > /dev/null ; then \

      changed="true"

      rm -f $1.OLD

    else

      rm -f $1

      mv $1.OLD $1

    fi

  fi

  echo "${changed}"

}

# Update the copyright year on all files changed by this changeset

updateChangesetFiles() # changeset

{

  count=0

  files=${tmp}/files.$1

  rm -f ${files}

  hg log -l1 --rev $1 -v --template '{files}\n' | expand \

    | ${awk} -F' ' '{for(i=1;i<=NF;i++)print $i}' \

    > ${files}

  if [ -f "${files}" -a -s "${files}" ] ; then

    copyright="Copyright (c)"

    company="Oracle"

    fcount=`cat ${files}| wc -l`

    for i in `cat ${files}` ; do

      if [ `updateFile "${i}"` = "true" ] ; then

        count=`expr ${count} '+' 1`

      fi

    done

    if [ ${count} -gt 0 ] ; then

      printf "  UPDATED year on %d of %d files.\n" ${count} ${fcount}

      total=`expr ${total} '+' ${count}`

    else

      printf "  None of the %d files were changed.\n" ${fcount}

    fi

  else

    printf "  ERROR: No files changed in the changeset? Must be a mistake.\n"

    set -x

    ls -al ${files}

    hg log -l1 --rev $1 -v --template '{files}\n'

    hg log -l1 --rev $1 -v --template '{files}\n' | expand \

      | ${awk} -F' ' '{for(i=1;i<=NF;i++)print $i}'

    set +x

    exit 1

  fi

  rm -f ${files}

}

# Check if repository is clean

previous=`hg status|wc -l`

if [ ${previous} -ne 0 ] ; then

  echo "WARNING: This repository contains previously edited working set files."

  echo "  hg status | wc -l = `hg status | wc -l`"

fi

# Get all changesets this year

all_changesets=${tmp}/all_changesets

rm -f ${all_changesets}

hg log --no-merges -v -d "${year}-01-01 to ${year}-12-31" --template '{node}\n' > ${all_changesets}

# Check changeset to see if it is Copyright only changes, filter changesets

if [ -s ${all_changesets} ] ; then

  echo "Changesets made in ${year}: `cat ${all_changesets} | wc -l`"

  index=0

  cat ${all_changesets} | while read changeset ; do

    index=`expr ${index} '+' 1`

    desc=${tmp}/desc.${changeset}

    rm -f ${desc}

    echo "------------------------------------------------"

    hg log -l1 --rev ${changeset} --template '{desc}\n' > ${desc}

    printf "%d: %s\n%s\n" ${index} "${changeset}" "`cat ${desc}|head -1`"

    if [ "${year}" = "2010" ] ; then

      if cat ${desc} | fgrep -i "Added tag" > /dev/null ; then

        printf "  EXCLUDED tag changeset.\n"

      elif cat ${desc} | fgrep -i rebrand > /dev/null ; then

        printf "  EXCLUDED rebrand changeset.\n"

      elif cat ${desc} | fgrep -i copyright > /dev/null ; then

        printf "  EXCLUDED copyright changeset.\n"

      else

        updateChangesetFiles ${changeset}

      fi

    else

      if cat ${desc} | fgrep -i "Added tag" > /dev/null ; then

        printf "  EXCLUDED tag changeset.\n"

      elif cat ${desc} | fgrep -i "copyright year" > /dev/null ; then

        printf "  EXCLUDED copyright year changeset.\n"

      else

        updateChangesetFiles ${changeset}

      fi

    fi

    rm -f ${desc}

  done

fi

if [ ${total} -gt 0 ] ; then

   echo "---------------------------------------------"

   echo "Updated the copyright year on a total of ${total} files."

   if [ ${previous} -eq 0 ] ; then

     echo "This count should match the count of modified files in the repository: hg status -m"

   else

     echo "WARNING: This repository contained previously edited working set files."

   fi

   echo "  hg status -m | wc -l = `hg status -m | wc -l`"

else

   echo "---------------------------------------------"

   echo "No files were changed"

   if [ ${previous} -ne 0 ] ; then

     echo "WARNING: This repository contained previously edited working set files."

   fi

   echo "  hg status -m | wc -l = `hg status -m | wc -l`"

fi

# Cleanup

rm -f -r ${tmp}

exit 0