#!/bin/sh+
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#+
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# Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.+
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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#+
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# This code is free software; you can redistribute it and/or modify it+
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# under the terms of the GNU General Public License version 2 only, as+
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# published by the Free Software Foundation.+
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#+
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# This code is distributed in the hope that it will be useful, but WITHOUT+
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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# version 2 for more details (a copy is included in the LICENSE file that+
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# accompanied this code).+
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#+
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# You should have received a copy of the GNU General Public License version+
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# 2 along with this work; if not, write to the Free Software Foundation,+
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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#+
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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# or visit www.oracle.com if you need additional information or have any+
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# questions.+
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#+
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+
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# Script for updating a patch file as per the shuffled/unshuffled source location.+
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+
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usage() {+
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      echo "Usage: $0 [-h|--help] [-v|--verbose] <repo> <input_patch> <output_patch>"+
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      echo "where:"+
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      echo "  <repo>          is one of: corba, jaxp, jaxws, jdk, langtools, nashorn"+
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      echo "                  [Note: patches from other repos do not need updating]"+
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      echo "  <input_patch>   is the input patch file, that needs shuffling/unshuffling"+
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      echo "  <output_patch>  is the updated patch file "+
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      echo " "+
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      exit 1+
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}+
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+
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SCRIPT_DIR=`dirname $0`+
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UNSHUFFLE_LIST=$SCRIPT_DIR"/unshuffle_list.txt"+
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+
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if [ ! -f "$UNSHUFFLE_LIST" ] ; then+
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  echo "FATAL: cannot find $UNSHUFFLE_LIST" >&2+
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  exit 1+
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fi+
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+
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vflag="false"+
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while [ $# -gt 0 ]+
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do+
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  case $1 in+
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    -h | --help )+
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      usage+
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      ;;+
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+
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    -v | --verbose )+
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      vflag="true"+
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      ;;+
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+
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    -*)  # bad option+
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      usage+
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      ;;+
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+
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     * )  # non option+
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      break+
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      ;;+
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  esac+
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  shift+
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done+
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+
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# Make sure we have the right number of arguments+
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if [ ! $# -eq 3 ] ; then+
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  echo "ERROR: Invalid number of arguments." >&2+
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  usage+
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fi+
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+
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# Check the given repo+
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repos="corba jaxp jaxws jdk langtools nashorn"+
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repo="$1"+
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found="false"+
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for r in $repos ; do+
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  if [ $repo = "$r" ] ; then+
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    found="true"+
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    break;+
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  fi+
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done+
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if [ $found = "false" ] ; then+
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  echo "ERROR: Unknown repo: $repo. Should be one of [$repos]." >&2+
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  usage+
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fi+
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+
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# Check given input/output files+
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input="$2"+
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if [ "x$input" = "x-" ] ; then+
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  input="/dev/stdin"+
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fi+
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+
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if [ ! -f $input -a "x$input" != "x/dev/stdin" ] ; then+
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  echo "ERROR: Cannot find input patch file: $input" >&2+
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  exit 1+
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fi+
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+
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output="$3"+
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if [ "x$output" = "x-" ] ; then+
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  output="/dev/stdout"+
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fi+
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+
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if [ -f $output -a "x$output" != "x/dev/stdout" ] ; then+
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  echo "ERROR: Output patch already exists: $output" >&2+
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  exit 1+
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fi+
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+
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what=""  ## shuffle or unshuffle+
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+
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verbose() {+
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  if [ ${vflag} = "true" ] ; then+
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    echo "$@" >&2+
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  fi+
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}+
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+
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unshuffle() {+
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  line=$@+
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  verbose "Attempting to rewrite: \"$line\""+
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+
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  # Retrieve the file name+
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  path=+
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  if echo "$line" | egrep '^diff' > /dev/null ; then+
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    if ! echo "$line" | egrep '\-\-git' > /dev/null ; then+
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      echo "ERROR: Only git patches supported. Please use 'hg export --git ...'." >&2+
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      exit 1+
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    fi+
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    path="`echo "$line" | sed -e s@'diff --git a/'@@ -e s@' b/.*$'@@`"+
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  elif echo "$line" | egrep '^\-\-\-' > /dev/null ; then+
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    path="`echo "$line" | sed -e s@'--- a/'@@`"+
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  elif echo "$line" | egrep '^\+\+\+' > /dev/null ; then+
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    path="`echo "$line" | sed s@'+++ b/'@@`"+
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  fi+
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  verbose "Extracted path: \"$path\""+
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+
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  # Only source can be shuffled, or unshuffled+
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  if ! echo "$path" | egrep '^src/.*' > /dev/null ; then+
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    verbose "Not a src path, skipping."+
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    echo "$line" >> $output+
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    return+
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  fi+
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+
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  # Shuffle or unshuffle?+
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  if [ "${what}" = "" ] ; then+
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    if echo "$path" | egrep '^src/java\..*|^src/jdk\..*' > /dev/null ; then+
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      what="unshuffle"+
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    else+
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      what="shuffle"+
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    fi+
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    verbose "Shuffle or unshuffle: $what"+
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  fi+
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+
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  # Find the most specific matches in the shuffle list+
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  matches=+
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  matchpath="$repo"/"$path"/x+
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  while [ "$matchpath" != "" ] ; do+
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    matchpath="`echo $matchpath | sed s@'\(.*\)/.*$'@'\1'@`"+
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+
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    if [ "${what}" =  "shuffle" ] ; then+
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      pattern=": $matchpath$"+
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    else+
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      pattern="^$matchpath :"+
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    fi+
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    verbose "Attempting to find \"$matchpath\""+
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    matches=`egrep "$pattern" "$UNSHUFFLE_LIST"`+
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    if ! [ "x${matches}" = "x" ] ; then+
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      verbose "Got matches: [$matches]"+
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      break;+
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    fi+
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+
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    if ! echo "$matchpath" | egrep '.*/.*' > /dev/null ; then+
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      break;+
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    fi+
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  done+
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+
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  # Rewrite the line, if we have a match+
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  if ! [ "x${matches}" = "x" ] ; then+
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    shuffled="`echo "$matches" | sed -e s@' : .*'@@g -e s@'^[a-z]*\/'@@`"+
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    unshuffled="`echo "$matches" | sed -e s@'.* : '@@g -e s@'^[a-z]*\/'@@`"+
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    if [ "${what}" =  "shuffle" ] ; then+
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      newline="`echo "$line" | sed -e s@"$unshuffled"@"$shuffled"@g`"+
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    else+
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      newline="`echo "$line" | sed -e s@"$shuffled"@"$unshuffled"@g`"+
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    fi+
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    verbose "Rewriting to \"$newline\""+
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    echo "$newline" >> $output+
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  else+
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    echo "WARNING: no match found for $path"+
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    echo "$line" >> $output+
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  fi+
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}+
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+
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while IFS= read -r line+
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do+
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  if echo "$line" | egrep '^diff|^\-\-\-|^\+\+\+' > /dev/null ; then+
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    unshuffle "$line"+
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  else+
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    printf "%s\n" "$line" >> $output+
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  fi+
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done < "$input"+
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