#!/bin/bash

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Usage: tar-munge 0.21.0-SNAPSHOT hadoop-{common,hdfs,mapred}-*.tar.gz
# reads tarballs from command line
# writes hadoop-$vers.tar.gz

set -x
set -e

WORKDIR="hadoop-$1"

# erase the output directory and recreate it
rm -fr "$WORKDIR"
mkdir "$WORKDIR"

# untar the sub-projects
cat "$2" | (cd "$WORKDIR"; tar xzf -)
cat "$3" | (cd "$WORKDIR"; tar xzf -)
cat "$4" | (cd "$WORKDIR"; tar xzf -)

# cd into the work directory
cd "$WORKDIR"

# get rid of the version names
mv hadoop-common-* common
mv hadoop-hdfs-* hdfs
mv hadoop-mapred-* mapred

# munge text docs
mv common/{LICENSE,NOTICE,README}.txt .
rm hdfs/{LICENSE,NOTICE}.txt # same as common
rm mapred/{LICENSE,NOTICE}.txt # same as common

# munge the bin and conf directories
for dir in bin conf; do
  mkdir $dir
  for proj in common hdfs mapred; do
    cp -Rp $proj/$dir/* $dir
  done
done

# munge the lib directory
mkdir lib
for proj in common hdfs mapred; do
  cp -Rp $proj/lib/* lib
  rm -r $proj/lib
done
rm lib/hadoop-*.jar # hdfs and mapred dependencies on common, hdfs jars

# munge the webapps directory
mkdir webapps
for proj in hdfs mapred; do
  cp -Rp $proj/webapps/* webapps
  rm -r $proj/webapps
done

# get the c++ binaries (if compiled)
mkdir c++
for proj in hdfs mapred; do
  if [ -d $proj/c++ ]; then
    cp -Rp $proj/c++/* c++
    rm -r $proj/c++
  fi
done

# get librecordio (if compiled)
if [ -d mapred/librecordio ]; then
  mkdir librecordio
  cp -Rp mapred/librecordio/* librecordio
  rm -r mapred/librecordio
fi

# get our jar files
mv {common,hdfs,mapred}/*.jar .

# tar up the result
cd ..
tar czf "hadoop-$1.tar.gz" "hadoop-$1"